Determining sir in a communications system

Details Determining sir in a communications system Determining sir in a communications system

H - Electricity

04

B

H04B 17/00 (2006.01) H04B 7/02 (2006.01) H04Q 7/34 (2006.01)

Patent

CA 2230589

SIR (signal to impairment power ratio) of a received signal in a communications system is determined from DC components produced by at least two successive stages of performing a non-linear operation, e.g. squaring, the signal and separating the DC component from a non-DC component for supply to the next stage. A signal power of a desired signal component of the received signal can also be determined from the DC components. The signal power can be auto-correlated, and normalized auto- correlation results which exceed a threshold can be used to determine a Doppler bandwidth of the received signal, which can be used to adaptively adjust filters used for separating the DC components.

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