Optimum TPC command sequence in WCDMA
Chaoyang Chen, Liu Baoling, Quan Qingyi, Ping Zhang · 2002
In a WCDMA system, the single-bit adaptive step-size closed-loop power control scheme is popularly investigated. But the only information which the transmitter can apply to adjust the transmit power is the received TPC command sequence. On the other hand, we need a reference TPC command sequence (we call it the optimum TPC command sequence), if the transmitter receives such a TPC command, the SIR at the receiver meets the quality of service demand. To compare the optimum TPC command sequence with the transmitter received TPC command sequence, we can choose the step-size according to the amount of the difference between them. In this paper, we investigate the characters of the optimum TPC command sequence under some typical radio channel by computer simulation; it is found that the 0 and 1 alternative sequence is an optimum TPC command sequence.