Digital receiver capable of processing modulated signals at...

Details Digital receiver capable of processing modulated signals at... Digital receiver capable of processing modulated signals at...

2007-02-20

2007-02-20

Kim, Kevin (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S326000, C375S327000, C375S340000, C375S130000

Reexamination Certificate

active

10302845

ABSTRACT:
A digital receiver is enabled to process modulated signals at various data rates including a sampling circuit for receiving modulated signals and outputting digitalized sampled signals, a matched filter for expelling noise from digitalized sampled signals at a first data rate and at a second data rate and generating in-phase and quadrature-phase signals, a barker code correlator for depreading digitalized sampled signals at first data rate, a channel equalizer which counteracts co-channel interferences by using equalizer coefficients obtained from a plurality of noise whitening coefficients so as to generate a sequence of symbol decisions therefrom, a CCK correlator coupled to the channel equalizer for decoding signals at the second data rate and at a third data rate, a first quantization filter for recovering transmitted signals at the first data rate, and a second quantization fitler for recovering transmitted signals at the second data rate and at the third data rate.

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Fakatsellis, John, “Processing Gain for Direct Sequence Spread Spectrum Communication Systems and PRISM®”, Intersil TM, Aug. 1996, pp. 1-4.
Pearson, Bob, “Complementary Code Keying Made Simple”, Intersil TM, May 2000, pp. 4-1-4-7.

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