7.6 Receiver spurious emissions

37.145-13GPPActive Antenna System (AAS) Base Station (BS) conformance testingPart 1: conducted conformance testingRelease 17TS

7.6.1 Definition and applicability

The receiver spurious emissions power is the power of emissions generated or amplified in a receiver unit that appear at the TAB connector. The requirements apply to all AAS BS with separate RX and TX TAB connectors.

NOTE: In this case for FDD AAS BS the test is performed when both TX and RX are on, with the TX TAB connector terminated.

For a TAB connector supporting both RX and TX in TDD, the requirements apply during the transmitter OFF period. For a TAB connector supporting both RX and TX in FDD, the receiver spurious requirements are superseded by the TX spurious requirements in TS 37.105 [8], clause 6.6.6.

For RX only multi-band TAB connector(s), the RX spurious emissions requirements are subject to exclusion zones in each supported operating band. For multi-band TAB connector(s) that both transmit and receive in operating bands supporting TDD, RX spurious emissions requirements are applicable during the TX OFF period, and are subject to exclusion zones in each supported operating band. The unwanted emission level limit of a TAB connector RX min cell group is in general defined by the unwanted emission basic limit which is the same as the corresponding applicable Non-AAS BS per transmitter requirement specified in [3], [4], or [5], and its scaling by NRXU,countedpercell . The basic limits and corresponding scaling are defined in each relevant clause. The receiver spurious emission requirements are applied per the TAB connector RX min cell groups for all the configurations supported by the AAS BS.

7.6.2 Minimum Requirement

The minimum requirement for MSR operation is in TS 37.105 [8], clause 7.6.2.

The minimum requirement for single RAT UTRA operation is defined in TS 37.105 [8], clause 7.6.3.

The minimum requirement for single RAT E-UTRA operation is defined in TS 37.105 [8], clause 7.6.4.

7.6.3 Test Purpose

The test purpose is to verify the ability of the AAS BS to limit the interference caused by receiver spurious emissions to other systems.

7.6.4 Method of test

7.6.4.1 Initial conditions

Test environment:

– normal; see clause B.2

RF channels to be tested for single carrier:

– M; see clause 4.12.1.

Base Station RF Bandwidth positions to be tested for multi-carrier:

– MRFBW in single-band operation, see clause 4.12.1, BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see clause 4.12.1.

7.6.4.2 Procedure

7.6.4.2.1 General procedure

The general procedure steps apply to the procedures for all the RATs.

The minimum requirement is applied to all TAB connectors described in clause 7.6.1, they may be tested one at a time or multiple TAB connectors may be tested in parallel as shown in annex D.2.4. Whichever method is used the procedure is repeated until all TAB connectors necessary to demonstrate conformance have been tested; see clause 7.1.

1) Connect TAB connector to measurement equipment as shown in annex D.2.4. All TAB connectors not under test shall be terminated.

7.6.4.2.2 MSR operation

1) Set the measurement equipment parameters as specified in table 7.6.5.2.1-1.

2) Set the transmitter unit associated with the TAB connector under test to transmit with the carrier set-up and power allocation according to the applicable test configuration(s), see clause 5.

3) Measure the spurious emissions over each frequency range described in clause 7.6.5.2.1.

In addition, for multi-band TAB connector(s), the following steps shall apply:

4) For multi-band TAB connectors and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

7.6.4.2.3 Single RAT UTRA FDD operation

1) For TAB connector(s) capable of single carrier operation only, set each TAB connector declared in the same RAT and operating band to transmit a signal according to TM1, (clause 4.12.2), at the manufacturer’s declared rated output power, PRated,c,TABC.

For TAB connector(s) declared to be capable of multi-carrier operation, set each TAB connector declared in the same RAT and operating band to transmit a signal according to TM1on all carriers configured, using the applicable test configuration and corresponding power setting for receiver tests, as specified in clause 4.11.

2) Set measurement equipment parameters as specified in table 7.6.4.2.3-1.

3) Measure the spurious emissions over each frequency range described in clause 7.6.5.2.2

Table 7.6.4.2.3-1: Measurement equipment parameters

Measurement Band width

3.84 MHz (Root raised cosine,0.22) / 100 kHz/ 1 MHz (note)

Sweep frequency range

30 MHz to 12.75GHz

Detection

True RMS

NOTE: As defined in clause 7.6.2.

– The emission power should be averaged over an appropriate time duration to ensure the measurement is within the measurement uncertainty in Table 4.1.2.3-1.

In addition, for multi-band TAB connector(s), the following steps shall apply:

4) For multi-band TAB connectors and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

7.6.4.2.4 Single RAT UTRA TDD 1,28Mcps option operation

1) For TAB connector(s) capable of single carrier operation only, set each TAB connector declared in the same RAT and operating band to transmit a signal according to table 7.6.4.2.4-1, at the manufacturer’s declared rated output power, PRated,c,TABC.

For TAB connector(s) declared to be capable of multi-carrier operation, set each TAB connector declared in the same RAT and operating band to transmit a signal according to table 7.6.4.2.4-1on all carriers configured, using the applicable test configuration and corresponding power setting for receiver tests, as specified in clause 4.11.

Table 7.6.4.2.4-1: Parameters of the transmitted signal
for Rx spurious emissions test 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

TS1, TS2 and TS3

Number of DPCH in each time slot under test

8

Power of each DPCH

1/8 of Base Station output power

Data content of DPCH

real life (sufficient irregular)

2) Measure the power of the spurious emissions by applying the measuring equipment with the settings as specified in table 7.6.4.2.4-2. The characteristics of the measurement filter with the bandwidth 1,28 MHz shall be RRC with roll-off α = 0,22. The characteristics of the measurement filters with bandwidths 100 kHz and 1 MHz shall be approximately Gaussian (typical spectrum analyzer filter). The centre frequency of the filters shall be stepped in contiguous steps over the frequency bands as specified in table 7.6.4.2.4-2. The time duration of each step shall be sufficiently long to capture one even (transmit) time slot.

In addition, for multi-band TAB connector(s), the following steps shall apply:

3) For multi-band TAB connectors and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

Table 7.6.4.2.4-2: Measurement equipment settings

Stepped frequency range

Measurement bandwidth

Step width

Note

Detection mode

30 MHz – 1 GHz

100 kHz

100 kHz

true RMS

1 GHz – 1,880 GHz

1 MHz

1 MHz

With the exception of frequencies between 4 MHz below the first carrier frequency and 4 MHz

1,880 GHz – 1,980 GHz

1,28 MHz

200 kHz

above the last carrier frequency used by the BS

1,980 GHz – 2,010 GHz

1 MHz

1 MHz

2,010 GHz – 2,025 GHz

1,28 MHz

200 kHz

2,025 – 2,300 GHz

1 MHz

1 MHz

2,300 GHz -2,400 GHz

1,28 MHz

200 kHz

2,400 GHz -2,500 GHz

1 MHz

1 MHz

2,500 GHz – 2,620 GHz

1,28 MHz

200 kHz

2,620 GHz – 12,75 GHz

1 MHz

1 MHz

– The emission power should be averaged over an appropriate time duration to ensure the measurement is within the measurement uncertainty in Table 4.1.2.3-1.

7.6.4.2.5 Single RAT E-UTRA operation

1) Set the measurement equipment parameters as specified in table 7.6.5.2.5-1.

2) Set the TAB connector(s) to transmit with the carrier set-up and power allocation according to the applicable test configuration(s), see clause 5.

3) Measure the spurious emissions over each frequency range described in clause 7.6.5.2.4.

In addition, for multi-band TAB connector(s), the following steps shall apply:

4) For multi-band TAB connectors and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

7.6.5 Test Requirements

7.6.5.1 General

Conformance may be shown to either the measure and sum test requirement or the per TAB connector test requirement.

1) The spurious emission test requirements for an AAS BS when using the measure and sum alternative are that for each TAB connector RX cell group and each applicable basic limit as specified in clause 7.6.5.2, the power summation of emissions at the TAB connectors of the TAB connector RX cell group shall not exceed a limit specified as the basic limit + X, where X = 10log10(NRXU,countedpercell), unless stated differently in regional regulation.

2) The spurious emission test requirements for an AAS BS when using the per TAB connector alternative are that for each TAB connector RX cell group and each applicable basic limit as specified in clause 7.6.5.2, the emissions at each of the TAB connectors of the TAB connector RX cell group shall not exceed a limit specified as the basic limit + X – 10log(n) where n is the number of TAB connectors in the TAB connector RX cell group and X = 10log10(NRXU,countedpercell), unless stated differently in regional regulation.

7.6.5.2 Basic limits

7.6.5.2.1 MSR operation

The basic limit for MSR operation is given below:

Table 7.6.5.2.1-1: General spurious emission test requirement basic limit

Frequency range

Basic limit

Measurement Bandwidth

Notes

30 MHz ‑ 1 GHz

-57 dBm

100 kHz

1 GHz ‑ 12.75 GHz

-47 dBm

1 MHz

12.75 GHz – 5th harmonic of the upper frequency edge of the UL operating band in GHz

-47 dBm

1 MHz

Applies only for Bands 22, 42, 43 and 48.

NOTE: The frequency range from FBW RF,DL,low – ΔfOBUE to FBW RF,_,DLhigh + ΔfOBUE may be excluded from the requirement. For BS capable of multi-band operation, the exclusion applies for all supported operating bands. For BS capable of multi-band operation where multiple bands are mapped on separate antenna connectors, the single-band requirements apply and the excluded frequency range is only applicable for the operating band supported on each antenna connector.

In addition to the basic limits in table 7.6.5.2.1-1, Additional spurious emissions requirements in clause 6.6.6.5.2.5 form basic limits for additional receiver spurious emission requirements.

In case of FDD BS (for BC1 and BC2), the levels specified for Protection of the BS receivers of own or different BS in clause 6.6.6.5.2.4, form basic levels for additional receiver spurious emission requirements.

In addition, the requirements for co-location with other base stations specified in clause 6.6.6.5.2.6, may also form basic levels for co-location spurious emission requirements.

7.6.5.2.2 Single RAT UTRA FDD operation

The basic limit for UTRA FDD operation is given below:

For multi-band TAB connectors, the exclusions and conditions in the Notes column of table 7.6.5.2.1-1 apply for each supported operating band. For BS capable of multi-band operation where multiple bands are mapped on separate antenna connectors, the single-band requirements apply and the excluded frequency range is only applicable for the operating band supported on each antenna connector.

Table 7.6.5.2.2-1: Spurious emission test requirement basic limit

Band

Basic limit

Measurement Bandwidth

Notes

30 MHz ‑ 1 GHz

-57 dBm

100 kHz

With the exception of frequencies between 12.5 MHz below the first carrier frequency and 12.5 MHz above the last carrier frequency transmitted used by the BS.

1 GHz ‑ 12.75 GHz

-47 dBm

1 MHz

With the exception of frequencies between 12.5 MHz below the first carrier frequency and 12.5 MHz above the last carrier frequency transmitted used by the BS.

12.75 GHz ‑ 5th harmonic of the upper frequency edge of the UL operating band in GHz

-47 dBm

1 MHz

NOTE: Applies only for Band XXII

In addition to the requirements in table 7.6.5.2.2-1, the power of any spurious emission shall not exceed the levels specified for Protection of the BS receiver of own or different BS in clause 6.6.6.5.2.4 and for Co-existence with other systems in the same geographical area in clause 6.6.6.5.2.5. In addition, the co-existence requirements for co-located base stations specified in clause 6.6.5.2.6 may also be applied.

NOTE: If the above Test Requirement 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 clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

7.6.5.2.3 Single RAT UTRA TDD 1,28Mcps option operation

The basic limits for UTRA TDD operation are given below:

Table 7.6.5.2.3-1: General receiver spurious emission test requirement basic limit

Band

Basic limit

Measurement Bandwidth

Note

30 MHz ‑ 1 GHz

-57 dBm

100 kHz

1 GHz ‑ 12.75 GHz

-47 dBm

1 MHz

With the exception of frequencies between 4 MHz below the first carrier frequency and 4 MHz above the last carrier frequency used by the BS.

In addition to the requirements in table 7.6.5.2.3-1, the power of any spurious emission shall not exceed the levels specified for Co-existence with other systems in the same geographical area in clause 6.6.6.5.2.4. In addition, the co-existence requirements for co-located base stations specified in clause 6.6.6.5.2.5 and 6.6.6.5.2.6 may also be applied.

NOTE: If the above Test Requirement 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 clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

7.6.5.2.4 Single RAT E-UTRA operation

The basic limit for E-UTRA operation is given below:

Table 7.6.5.2.4-1: General spurious emission test requirement basic limit

Frequency range

Basic limit

Measurement Bandwidth

Note

30 MHz ‑ 1 GHz

-57 dBm

100 kHz

1 GHz ‑ 12.75 GHz

-47 dBm

1 MHz

12.75 GHz – 5th harmonic of the upper frequency edge of the UL operating band in GHz

-47 dBm

1 MHz

Applies only for Bands 22, 42, 43 and 48.

NOTE: The frequency range from FBW RF,DL,low – ΔfOBUE to FBW RF,_,DLhigh + ΔfOBUE may be excluded from the requirement. For a multi-band TAB connector , the exclusion applies for all supported operating bands.

In addition to the requirements in table 7.6.5.2.4-1, the power of any spurious emission shall not exceed the additional spurious emissions requirements in clause 6.6.6.5.2.5 and in case of a TAB connector operating FDD (for BC1 and BC2) emission shall not exceed the levels specified for protection of the BS receivers of own or different BS in clause 6.6.6.5.2.4. In addition, the requirements for co-location with other Base Stations specified in clause 6.6.6.5.2.6 may also be applied.

NOTE: If the above Test Requirement 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 clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.