1GPAN26: Base Station Adjacent Time Slot Rejection Measurement with CMD and SME
- In radio networks using TDMA, such as GSM, PCN (DCS1800) and PCS (DCS1900), reception and demodulation of data transmitted in a time slot may be impaired by signals and data of the adjacent time slots. This could be the case if a mobile which is far away from the base station is using time slot e.g. 4, while two other mobiles very close to the base station are using the time slots 3 and 5.
In order to get highest performance measurements the suppression of adjacent time slot signals are prescribed for base station receivers. For instance, GSM specifications (ETSI/GSM 11.20) stipulate for base stations BER tolerances for a used time slot in the presence of a 50-dB higher level in the adjacent time slots while all other time slot are switched off. This measurement problem can be solved with the signal generator SME synchronised on the base station radio communication tester CMD 54 or CMD 57.
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Application Note - English version