SYSTEM AND METHOD FOR PROVIDING ACCURATE ESTIMATION OF RECEIVED SIGNAL INTERFERENCE FOR USE IN WIRELESS COMMUNICATIONS SYSTEMS

摘要

PROBLEM TO BE SOLVED: To provide a system and method for providing an accurate estimate of received signal interference for wireless communications systems.

SOLUTION: A system for providing an accurate interference value signal received over a channel and transmitted by an external transceiver includes a first receiver section for receiving the signal, which has a desired signal component and an interference component. A signal extracting circuit extracts an estimate of the desired signal component from the received signal. A noise estimation circuit 12 provides the accurate interference value on the basis of the estimate of the desired signal component and the received signal. A look-up table transforms the accurate noise and/or interference value to a normalization factor. A carrier signal-to interference ratio circuit employs the normalization factor and the received signal to compute an accurate carrier signal-to-interference ratio estimate. Path-weighting/combining circuitry 42 generates optimal path-combining weights on the basis of the received signal and the normalization factor.

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