H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/707 (2006.01)
Patent
CA 2331142
The performance of a RAKE receiver for indoor multipath WLAN applications on direct sequence spread spectrum signals having relatively short codeword lengths comprises a channel-matched filter and codeword correlator front end, plus a signal combiner to which the codeword correlation component is applied. The signal combiner is supplied with a bias- corrected input calculated by a distorted codeword signature (power) generator, which is operative to generate and store a set of N codeword power correction values. The signal combiner combines correction values into the codeword correlation for each potentially transmitted codeword S k. This serves to correct each correlation codeword metric by a de- biasing power component ¦S k¦2 far the unequal multipath-based distortions of the codeword energies. The output of the signal combiner is coupled to a peak detector, which selects a minimum distance-based 'de-biased' output as the transmitted codeword.
Halford Steven
Nelson George
Webster Mark
Intersil Corporation
Oldham Edward H.
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