Reverse link outer loop power control with adaptive...

Details Reverse link outer loop power control with adaptive... Reverse link outer loop power control with adaptive...

H - Electricity

04

B

H04B 7/005 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2330267

In a wireless communications system, a base station employs a bit error rate (BER) based Reverse Outer Loop Power Control (ROLPC) technique. The ROLPC technique uses either instantaneous or weakly filtered values of the BER for comparison with a BER target value for adjusting a target signal-to-noise ratio (SNR). The BER target value is varied as a function of a second order statistic (e.g. variance, standard deviation) of the received SNR. In another embodiment, a symbol error count based ROLPC technique uses adaptive SER targets. In particular, a base station uses a 2nd order statistic, e.g., standard deviation (variance), to identify, or act as a signature of, a particular cellular (wireless) communications environment. The base station monitors the standard deviation of the symbol error count of a received signal (transmitted from a mobile station). The target signal-to-noise ratio ((E b/N0)T) of this received signal is adjusted as a function of the value of the standard deviation and the adjusted (E b/N0)T target is used to provide power control.

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