6.8 Transmit Modulation
25.1423GPPBase Station (BS) conformance testing (TDD)Release 17TS
6.8.1 Modulation accuracy
6.8.1.1 Definition and applicability
The Error Vector Magnitude is a measure of the difference between the reference waveform and the measured waveform. This difference is called the error vector. Both waveforms pass through a matched Root Raised Cosine filter with bandwidth corresponding to the considered chip rate and roll-off =0,22. Both waveforms are then further modified by selecting the frequency, absolute phase, absolute amplitude and chip clock timing so as to minimise the error vector. The EVM result is defined as the square root of the ratio of the mean error vector power to the mean reference power expressed as a %. The measurement interval is one timeslot. The requirement is valid over the total power dynamic range as specified in section 3.1. See Annex C of this specification for further details.
NOTE: The theoretical modulated waveform shall be calculated on the basis that the transmit pulse shaping filter is a root-raised cosine (RRC) with roll-off =0,22 in the frequency domain. The impulse response of the chip impulse filter RC0(t) is
Where the roll-off factor = 0,22 and TC is the chip duration
6.8.1.2 Minimum Requirements
The error vector magnitude (EVM) shall not exceed 12,5 %. The requirement is valid over the total power dynamic range as specified in section 3.1.
The normative reference for this requirement is TS 25.105 [1] subclause 6.8.2.1.
6.8.1.3 Test purpose
The test purpose is to verify the ability of the BS transmitter to generate a sufficient precise waveform and thus to enable the UE receiver to achieve the specified error performance.
6.8.1.4 Method of test
6.8.1.4.1 Initial conditions
For 1,28 Mcps BS supporting 16QAM, the EVM requirements shall be tested with the general test set up specified in section 6.8.1.4.1.2 and also with the special test set up for 16QAM capable base station specified in section 6.8.1.4.1.2.
6.8.1.4.1.0 General test conditions
Test environment: normal; see subclause 5.9.1.
RF channels to be tested for single carrier: B, M and T; see subclause 5.3.
RF bandwidth positions to be tested for multi-carrier: BRFBW, MRFBW and TRFBW in single band operation, see subclause 5.3; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see subclause 5.3;
6.8.1.4.1.1 3,84 Mcps TDD option – General test setup
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.39. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 1 in subclause 6.1.1.1.
Table 6.39: Parameters of the BS transmitted signal for modulation accuracy testing
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
Number of DPCH in each time slot under test |
1 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
BS power setting |
PRAT |
|
Data content of DPCH |
real life (sufficient irregular) |
6.8.1.4.1.2 1,28 Mcps TDD option – General test set up
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) For a BS declared to be capable of single carrier operation only, set the parameters of the BS transmitted signal according to Table 6.39A at manufacturer’s declared output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the BS to transmit according to Table 6.39A on all carriers configured using the applicable test configuration and corresponding power setting specified in subclause 5.20 and 5.21.
Table 6.39A: Parameters of the BS transmitted signal for modulation accuracy testing at maximum BS output power for 1,28 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: Transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
Number of DPCH in each time slot under test |
10 |
|
Power of each DPCH |
1/10 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
6.8.1.4.1.3 1,28 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) For a BS declared to be capable of single carrier operation only, set the parameters of the BS transmitted signal according to table 6.39B at the manufacturer’s declared output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the BS to transmit according to Table 6.39B on all carriers configured using the applicable test configuration and corresponding power setting specified in subclause 5.20 and 5.21.
Table 6.39B: Parameters of the BS transmitted signal for modulation accuracy testing at maximum BS output power setting for 1,28 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, 3, 4, 5, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
HS-PDSCH modulation |
16QAM |
|
Number of HS-PDSCH in each time slot under test |
10 |
|
Power of each HS-PDSCH |
1/10 of Base Station output power |
|
Data content of HS-PDSCH |
Real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.1.4.1.4 3,84 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.39BA. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 2 in subclause 6.1.1.2.
Table 6.39BA: Parameters of the BS transmitted signal for modulation accuracy testing at maximum BS output power setting for 3,84 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slots under test |
TS i, i even and non zero |
|
HS-PDSCH modulation |
16QAM |
|
Number of DPCH in each time slot under test |
9 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
BS power setting |
PRAT |
|
Data content of DPCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.1.4.1.5 7,68 Mcps TDD option – General test setup
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.39BC.
Table 6.39BC: Parameters of the BS transmitted signal for modulation accuracy testing
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
Number of DPCH in each time slot under test |
1 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
BS power setting |
PRAT |
|
Data content of DPCH |
real life (sufficient irregular) |
6.8.1.4.1.6 7,68 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.39BD.
Table 6.39BD: Parameters of the BS transmitted signal for modulation accuracy testing at maximum BS output power setting for 7.68 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slots under test |
TS i, i even and non zero |
|
HS-PDSCH modulation |
16QAM |
|
Number of DPCH in each time slot under test |
9 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
BS power setting |
PRAT |
|
Data content of DPCH |
real life (sufficient irregular) |
|
Spreading factor |
32 |
6.8.1.4.2 Procedure
6.8.1.4.2.1 3,84 Mcps TDD option – General procedure
(1) Measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C with the BS transmitted signal set as described in Table 6.39.
(2) Set the BS transmitted signal according to Table 6.39BB and measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 1 in subclause 6.1.1.1. A prerequisite for the test is that the BS output power setting is set to the maximum – 30 dB.
Table 6.39BB: Parameters of the BS transmitted signal for modulation accuracy testing at minimum BS output power setting for 3,84 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
Maximum output power – 30 dB |
|
Number of DPCH in each time slot under test |
1 |
|
Data content of DPCH |
real life (sufficient irregular) |
6.8.1.4.2.2 1,28 Mcps TDD option – General procedure
(1) Measure the error vector magnitude (EVM) for each carrier by applying the global in-channel Tx test method described in Annex C with the BS transmitted signal set as described in Table 6.39A.
(2) Measure the error vector magnitude (EVM) for each carrier by applying the global in-channel Tx test method described in Annex C with the BS transmitted signal on each carrier set as described in Table 6.39C.
In addition, for a multi-band capable BS, the following steps shall apply:
(3) For multi-band capable BS and single band tests, repeat the steps above per involved band with no carrier activated in the other band.
(4) For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.
Table 6.39C: Parameters of the BS transmitted signal for modulation accuracy testing at minimum BS output power for 1,28 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: Transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slot under test |
TS4, TS5 and TS6 |
|
Number of DPCH in each time slot under test |
1 |
|
BS output power setting on each carrier |
Maximum output power – 30 dB |
|
Data content of DPCH |
Real life (sufficient irregular) |
6.8.1.4.2.3 1,28 Mcps TDD option – Special procedure for 16QAM capable BS
(1) Measure the error vector magnitude (EVM) for each carrier by applying the global in-channel Tx test method described in Annex C with the BS transmitted signal set as described in Table 6.39B.
(2) Measure the error vector magnitude (EVM) for each carrier by applying the global in-channel Tx test method described in Annex C with the BS transmitted singal on each carrier set as described in Table 6.39D.
In addition, for a multi-band capable BS, the following steps shall apply:
(3) For multi-band capable BS and single band tests, repeat the steps above per involved band with no carrier activated in the other band.
(4) For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.
Table 6.39D: Parameters of the BS transmitted signal for modulation accuracy testing at minimum BS output power setting for 1,28 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, 3, 4, 5, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
HS-PDSCH modulation |
16QAM |
|
Time slots under test |
TS4, TS5 and TS6 |
|
Number of HS-PDSCH in each time slot under test |
1 |
|
BS output power setting on each carrier |
Maximum output power – 30 dB |
|
Data content of HS-PDSCH |
Real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.1.4.2.4 3,84 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C.
(2) Set the BS transmitted signal according Table 6.39E and measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 2 in subclause 6.1.1.2. A prerequisite for the test is that the BS output power setting is set to the maximum – 30 dB.
Table 6.39E: Parameters of the BS transmitted signal for modulation accuracy testing at minimum BS output power setting for 3,84 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
Maximum output power- 30 dB |
|
HS-PDSCH modulation |
16QAM |
|
Number of HS-PDSCH in each time slot under test |
1 |
|
Data content of HS-PDSCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.1.4.2.5 7,68 Mcps TDD option – General procedure
(1) Measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C with the BS transmitted signal set as described in Table 6.39F.
(2) Set the BS transmitted signal according to Table 6.39F and measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C
Table 6.39F: Parameters of the BS transmitted signal for modulation accuracy testing at minimum BS output power setting for 7,68 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
Maximum output power – 30 dB |
|
Number of DPCH in each time slot under test |
1 |
|
Data content of DPCH |
real life (sufficient irregular) |
6.8.1.4.2.6 7,68 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C.
(2) Set the BS transmitted signal according Table 6.39G and measure the error vector magnitude (EVM) by applying the global in-channel Tx test method described in Annex C.
Table 6.39G: Parameters of the BS transmitted signal for modulation accuracy testing at minimum BS output power setting for 7,68 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
Maximum output power- 30 dB |
|
HS-PDSCH modulation |
16QAM |
|
Number of HS-PDSCH in each time slot under test |
1 |
|
Data content of HS-PDSCH |
real life (sufficient irregular) |
|
Spreading factor |
32 |
6.8.1.5 Test Requirements
NOTE: If the Test Requirement below differs from the Minimum Requirement, then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in subclause 5.11 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex D.
The error vector magnitude (EVM) for each carrier measured according to subclause 6.8.1.4.2 shall not exceed 12,5 %.
6.8.2 Peak code domain error
6.8.2.1 Definition and applicability
The code domain error is computed by projecting the error vector power onto the code domain at a specific spreading factor. The error power for each code is defined as the ratio to the mean power of the reference waveform expressed in dB. And the Peak Code Domain Error is defined as the maximum value for Code Domain Error. The measurement interval is one timeslot.
The requirements in this subclause shall apply to both Wide Area BS and Local Area BS.
6.8.2.2 Minimum Requirements
The peak code domain error shall not exceed -28 dB at spreading factor 16. For 7.68 Mcps, the peak code domain error shall not exceed -31 dB at spreading factor 32.
The normative reference for this requirement is TS 25.105 [1] subclause 6.8.3.1.
6.8.2.3 Test purpose
The test purpose is to verify the ability of the BS transmitter to limit crosstalk among codes and thus to enable the UE receiver to achieve the specified error performance.
6.8.2.4 Method of test
6.8.2.4.1 Initial conditions
For 3,84 Mcps BS supporting 16QAM, the PCDE requirement shall be tested with the general test set up specified in section 6.8.2.4.1 and also with the special test set up for 16QAM capable BS specified in section 6.8.2.4.4.
For 1,28 Mcps BS supporting 16QAM, the PCDE requirement shall be tested with the general test set up specified in section 6.8.2.4.2 and also with the special test set up for 16QAM capable BS specified in section 6.8.2.4.3.
For 7,68 Mcps BS supporting 16QAM, the PCDE requirement shall be tested with the general test set up specified in section 6.8.2.4.1.5 and also with the special test set up for 16QAM capable BS specified in section 6.8.2.4.1.6.
6.8.2.4.1.0 General test conditions
Test environment: normal; see subclause 5.9.1.
RF channels to be tested for single carrier: B, M and T; see subclause 5.3.
RF bandwidth positions to be tested for multi-carrier: BRFBW, MRFBW and TRFBW in single band operation, see subclause 5.3; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see subclause 5.3.
6.8.2.4.1.1 3,84 Mcps TDD option – General test set up
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.40. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 1 in subclause 6.1.1.1.
Table 6.40: Parameters of the BS transmitted signal
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
PRAT |
|
Number of DPCH in each time slot under test |
9 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.2.4.1.2 1,28 Mcps TDD option- General test set up
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) For a BS declared to be capable of single carrier operation only, set the parameters of the BS transmitted signal according to table 6.40A at manufacturer’s declared output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the BS to transmit according to Table 6.40A on all carriers configured using the applicable test configuration and corresponding power setting specified in subclause 5.20 and 5.21.
Table 6.40A: Parameters of the BS transmitted signal for 1,28 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
Number of DPCH in each time slot under test |
10 |
|
Power of each DPCH |
1/10 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.2.4.1.3 1,28 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) For a BS declared to be capable of single carrier operation only, set the parameters of the BS transmitted signal according to table 6.40B at manufacturer’s declared output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the BS to transmit according to Table 6.40B on all carriers configured using the applicable test configuration and corresponding power setting specified in subclause 5.20 and 5.21.
Table 6.40B: Parameters of the BS transmitted signal for 1,28 Mcps TDD – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
HS-PDSCH modulation |
16QAM |
|
BS output power setting |
PRAT |
|
Number of HS-PDSCH in each time slot under test |
10 |
|
Power of each HS-PDSCH |
1/10 of Base Station output power |
|
Data content of HS-DSCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.2.4.1.4 3,84 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.40C. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 2 in subclause 6.1.1.2.
Table 6.40C: Parameters of the BS transmitted signal – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
PRAT |
|
HS-PDSCH modulation |
16QAM |
|
Number of HS-PDSCH in each time slot under test |
9 |
|
Power of each HS-PDSCH |
1/9 of Base Station output power |
|
Data content of HS-PDSCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.2.4.1.5 7,68 Mcps TDD option – General test set up
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.40D.
Table 6.40D: Parameters of the BS transmitted signal
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
PRAT |
|
Number of DPCH in each time slot under test |
9 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
|
Spreading factor |
32 |
6.8.2.4.1.6 7,68 Mcps TDD option – Special test set up for 16QAM capable BS
This test set up only applies for 16QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) Set the parameters of the BS transmitted signal according to table 6.40E.
Table 6.40E: Parameters of the BS transmitted signal – 16QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd. |
|
Time slot carrying SCH |
TS0 |
|
Time slots under test |
TS i, i even and non zero |
|
BS output power setting |
PRAT |
|
HS-PDSCH modulation |
16QAM |
|
Number of HS-PDSCH in each time slot under test |
9 |
|
Power of each HS-PDSCH |
1/9 of Base Station output power |
|
Data content of HS-PDSCH |
real life (sufficient irregular) |
|
Spreading factor |
32 |
6.8.2.4.2 Procedure
1) Measure the peak code domain error by applying the global in-channel Tx test method described in Annex C.
In addition, for a multi-band capable BS, the following steps shall apply:
2) For multi-band capable BS and single band tests, repeat the steps above per involved band with no carrier activated in the other band.
3) For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.
6.8.2.5 Test Requirements
NOTE: If the Test Requirement below differs from the Minimum Requirement, then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in subclause 5.11 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex D.
The peak code domain error measured according to subclause 6.8.2.4.2 shall not exceed -27 dB.
6.8.3 Relative Code Domain Error
6.8.3.1 Definition and applicability
The Relative Code Domain Error is computed by projecting the error vector onto the code domain at a specified spreading factor. Only the active code channels in the composite reference waveform are considered for this requirement. The Relative Code Domain Error for every active code is defined as the ratio of the mean power of the error projection onto that code, to the mean power of the active code in the composite reference waveform. This ratio is expressed in dB. The measurement interval is one timeslot.
The requirement for Relative Code Domain Error is only applicable for 64QAM modulated codes.
6.8.3.2 Minimum requirement
The average Relative Code Domain Error for 64QAM modulated codes shall not exceed -21.9dB at spreading factor 16. The normative reference for this requirement is TS 25.105 [1] subclause 6.8.4.1
6.8.3.3 Test Purpose
It is the purpose of this test to verify that the Relative Code Domain Error is within the limit specified by 6.8.3.2.
6.8.3.4 Method of test
6.8.3.4.1 Initial conditions
For 1,28 Mcps BS supporting 64QAM, the RCDE requirement shall be tested with the general test set up specified in section 6.8.3.4.1.1 and also with the special test set up for 64QAM capable BS specified in section 6.8.3.4.1.2.
6.8.3.4.1.0 General test conditions
Test environment: normal; see subclause 5.9.1.
RF channels to be tested for single-carrier: B, M and T; see subclause 5.3.
RF bandwidth positions to be tested for multi-carrier: BRFBW, MRFBW and TRFBW in single band operation, see subclause 5.3; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see subclause 5.3;
6.8.3.4.1.1 1.28 Mcps TDD option- General test set up
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) For a BS declared to be capable of single carrier operation only, set the parameters of the BS transmitted signal according to table 6.41 at manufacturer’s declared output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the BS to transmit according to table 6.41on all carriers configured using the applicable test configuration and corresponding power setting specified in subclause 5.20 and 5.21.
Table 6.41: Parameters of the BS transmitted signal for 1,28 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
Number of HS-PDSCH in each time slot under test |
10 |
|
Power of each HS-PDSCH |
1/10 of Base Station output power |
|
Data content of HS-PDSCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.3.4.1.2 1.28 Mcps TDD option – Special test set up for 64QAM capable BS
This test set up only applies for 64QAM capable BS.
(1) Connect the measuring equipment to the antenna connector of the BS under test.
(2) For a BS declared to be capable of single carrier operation only, set the parameters of the BS transmitted signal according to table 6.41A at manufacturer’s declared output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the BS to transmit according to Table 6.41A on all carriers configured using the applicable test configuration and corresponding power setting specified in sub-clause 5.20 and 5.21.
Table 6.41A: Parameters of the BS transmitted signal for 1,28 Mcps TDD – 64QAM capable BS
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
HS-PDSCH modulation |
64QAM |
|
Number of HS-PDSCH in each time slot under test |
10 |
|
Power of each HS-PDSCH |
1/10 of Base Station output power |
|
Data content of HS-PDSCH |
real life (sufficient irregular) |
|
Spreading factor |
16 |
6.8.3.4.2 Procedure
1) Measure the Relative code domain error by applying the global in-channel Tx test method described in Annex C.
In addition, for a multi-band capable BS, the following steps shall apply:
2) For multi-band capable BS and single band tests, repeat the steps above per involved band with no carrier activated in the other band.
3) For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.
6.8.3.5 Test Requirements
NOTE: If the Test Requirement below differs from the Minimum Requirement, then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in subclause 5.11 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex D.
The Relative code domain error measured according to subclause 6.8.3.4.2 shall not exceed -20.9 dB.
6.8.4 Time alignment error in MIMO transmission
6.8.4.1 Definition and applicability
In MIMO transmission, signals are transmitted from two or more antennas. These signals shall be aligned. The time alignment error in MIMO transmission is specified as the delay between the signals from two antennas at the antenna ports.
This test is only applicable for Node B supporting MIMO transmission.
6.8.4.2 Minimum requirement
The time alignment error in MIMO for any possible configuration of two transmit antennas shall not exceed 65 ns.
The normative reference for this requirement is TS 25.105 [1] subclause 6.8.5.1.
6.8.4.3 Test Purpose
It is the purpose of this test to verify that the timing alignment error in MIMO is within the limit specified in 6.8.4.2.
6.8.4.4 Method of test
6.8.4.4.1 Initial conditions
For 1,28 Mcps BS supporting MIMO transmission, the time alignment error shall be tested with the general test set up specified in section 6.8.4.4.1.1.
6.8.4.4.1.0 General test conditions
Test environment: normal; see subclause 5.9.1.
RF channels to be tested for single-carrier: Middle; see subclause 5.3.
RF bandwidth positions to be tested for multi-carrier: MRFBW in single band operation, see subclause 5.3.
6.8.4.4.1.1 1.28 Mcps TDD option- General test set up
1) Connect two base station RF antenna ports to the measurement equipment as shown in Figure 6.6. If available terminate the other unused antenna ports.
Timing
analyzer
BS under
TX test
TX
TX
TX
TX
Termination
Termination
…
…
…
Figure 6.6: Measuring system Set-up for Test of Time alignment error
2) For a BS declared to be capable of single carrier operation only, set the base station to transmit according to table 6.42 on one cell using MIMO, atmanufacturer’s declared output power, PRAT.
For a FDD BS declared to be capable of multi-carrier operation, set the BS to transmit according to table 6.42 on all carriers configured using the applicable test configuration and corresponding power setting specified in subclause 5.20 and 5.21.
Table 6.42: Parameters of the BS transmitted signal for 1,28 Mcps TDD
|
Parameter |
Value/description |
|
TDD Duty Cycle |
TS i; i = 0, 1, 2, …, 6: transmit, if i is 0,4,5,6; receive, if i is 1,2,3. |
|
Time slots under test |
TS0 and DwPTS |
|
Spreading factor |
16 |
6.8.4.4.2 Procedure
6.8.4.4.2.1 1.28 Mcps TDD option
1) Start BS transmission at the manufacturer’s specified maximum output power.
2) Measure the time alignment error between the P-CCPCH and DwPTS on the antenna ports under test.
3) Repeat the measurement for any other possible configuration of 2 transmit antennas.
In addition, for a multi-band capable BS, the following steps shall apply:
4) For multi-band capable BS and single band tests, repeat the steps above per involved band with no carrier activated in the other band.
5) For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.
6.8.4.5 Test Requirements
NOTE: If the Test Requirement below differs from the Minimum Requirement, then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in subclause 5.11 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex D.
6.8.4.5.1 1.28 Mcps TDD option
The time alignment error shall be less than 65+[78]ns.