Cyclic shift delay detection using a channel impulse response

摘要

Systems, apparatus and methods for determining a cyclic shift diversity (CSD) mode are presented. Examples use a channel impulse response (CIR) to determine a current CSD mode. Specifically, a channel impulse response from an orthogonal frequency-division multiplexing (OFDM) symbol, which forms CIR samples. The CIR samples are examined to find a local maxima. A current CSD mode may be selected based on the local maxima found in the CIR samples.

主权项

1. A method for finding cyclic shift diversity (CSD), the method comprising:
receiving, at a transceiver, an orthogonal frequency-division multiplexing (OFDM) symbol transmitted using a particular CSD mode; computing a channel impulse response (CIR) of the ODFM symbol to form CIR samples; determining local maxima in the CIR samples; and selecting a CSD mode being used based on the local maxima.