6.5 Transmitted signal quality
37.1043GPPMulti-Standard Radio (MSR) Base Station (BS) radio transmission and receptionNR, E-UTRA, UTRA and GSM/EDGERelease 17TS
6.5.1 Modulation quality
Modulation quality is defined by the difference between the measured carrier signal and a reference signal. Modulation quality can e.g. be expressed as Error Vector Magnitude (EVM), Peak Code Domain Error (PCDE) or Relative Code domain Error (RCDE).
6.5.1.1 E-UTRA minimum requirement
For E-UTRA, the minimum requirement for modulation quality, EVM, is specified in TS 36.104 [4], subclause 6.5.2.
6.5.1.2 UTRA FDD minimum requirement
For UTRA FDD, the minimum requirements for modulation quality, EVM, PCDE and RCDE, are specified in TS 25.104 [2], subclause 6.8.2, 6.8.3 and 6.8.5 respectively. The UTRA transmit pulse shape filter is defined in subclause 6.8.1.
6.5.1.3 UTRA TDD minimum requirement
For UTRA TDD, the minimum requirements for modulation quality, EVM, PCDE and RCDE, are specified in TS 25.105 [3], subclause 6.8.2, 6.8.3 and 6.8.4 respectively.
6.5.1.4 GSM/EDGE minimum requirement
For GSM/EDGE, the minimum requirements for modulation accuracy are specified in TS 45.005 [5], subclause 4.6.
6.5.1.5 NB-IoT minimum requirement
For NB-IoT, the minimum requirement for modulation quality, EVM, is specified in TS 36.104 [4], subclause 6.5.2.
6.5.1.6 NR minimum requirement
For NR, the minimum requirement for modulation quality, EVM (BS type 1-C) is specified in TS 38.104 [17], subclause 6.5.2.
6.5.2 Frequency error
Frequency error is a measure of the difference between the actual BS transmit frequency and the assigned frequency. The same source shall be used for RF frequency and data clock generation.
6.5.2.1 E-UTRA minimum requirement
For E-UTRA, the minimum requirement for frequency error is specified in TS 36.104 [4], subclause 6.5.1.
6.5.2.2 UTRA FDD minimum requirement
For UTRA FDD, the minimum requirement for frequency error is specified in TS 25.104 [2], subclause 6.3.1.
6.5.2.3 UTRA TDD minimum requirement
For UTRA TDD, the minimum requirement for frequency error is specified in TS 25.105 [3], subclause 6.3.1.
6.5.2.4 GSM/EDGE minimum requirement
For GSM/EDGE, the minimum requirement for frequency error is specified in TS 45.005 [5], subclause 4.4.
6.5.2.5 NB-IoT minimum requirement
For NB-IoT, the minimum requirement for frequency error is specified in TS 36.104 [4], subclause 6.5.1.
6.5.2.6 NR minimum requirement
For NR, the minimum requirement for frequency error (BS type 1-C) is specified in TS 38.104 [17], subclause 6.5.1.
6.5.3 Time alignment error
This requirement applies to frame timing in:
– UTRA single/multi-carrier transmissions, and their combinations with MIMO or TX diversity.
– E-UTRA single/multi-carrier transmissions, and their combinations with MIMO or TX diversity.
– NR single/multi-carrier transmissions, and their combinations with MIMO.
– E-UTRA Carrier Aggregation, with or without MIMO or TX diversity.
– NR Carrier Aggregation, with or without MIMO.
– NB-IoT transmissions with TX diversity.
Frames of the WCDMA/LTE/NR/NB-IoT signals present at the BS transmitter antenna connector(s) are not perfectly aligned in time. In relation to each other, the RF signals present at the BS transmitter antenna connector (s) experience certain timing differences.
For a specific set of signals/transmitter configuration/transmission mode, the Time Alignment Error (TAE) is defined as the largest timing difference between any two signals.
6.5.3.1 E-UTRA minimum Requirement
For E-UTRA, the minimum requirement for time alignment is specified in TS 36.104 [4], subclause 6.5.3.
6.5.3.2 UTRA FDD minimum requirement
For UTRA FDD, the minimum requirement for time alignment is specified in TS 25.104 [2], subclause 6.8.4.
6.5.3.3 UTRA TDD minimum requirement
For UTRA TDD, the minimum requirement for time alignment is specified in TS 25.105 [3], subclause 6.8.5.
6.5.3.4 NB-IoT minimum Requirement
For NB-IoT, the minimum requirement for time alignment is specified in TS 36.104 [4], subclause 6.5.3.
6.5.3.5 NR minimum Requirement
For NR, the minimum requirement for time alignment (BS type 1-C) is specified in TS 38.104 [17], subclause 6.5.3.