Apparatus and method for equalizing a corrupted signal in a...

Details Apparatus and method for equalizing a corrupted signal in a... Apparatus and method for equalizing a corrupted signal in a...

H - Electricity

04

B

H04B 1/10 (2006.01) H04B 7/005 (2006.01) H04L 25/02 (2006.01) H04L 25/03 (2006.01)

Patent

CA 2097694

2097694 9211708 PCTABS00014 An equalization system for equalizing a corrupted signal is disclosed. The equalization system includes a complex matched filter (400) and a maximum likelihood sequence estimator (MLSE) (405) for removing the effects of phase shift, amplitude variations, intersymbol interference, etc. resulting from multi-pathing and noise contributed by the receiver front end. The system estimates a correlation signal C(t) (505) and synchronizes C(t) (505) to maximize its energy as seen on the taps of the complex matched filter (400). Taps having amplitude coefficients below a predetermined threshold are set to zero to produce a modified CIR estimate. The modified CIR estimate which has had the effects of noise virtually eliminated, is then used to construct the complex matched filter (400) and is also used as input to the MLSE (405) to produce a better equalized data signal.

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