Patent ID: 7991043
Filing Date: 2011-08-02
Classification: H04B

Abstract:
1. A demodulator for de-spreading a digitally-modulated signal including a plurality of symbols, each symbol having a symbol period and spread among a plurality of chips, the digitally-modulated signal including a preamble of pre-determined symbols, the demodulator comprising: a correlator for performing correlations, the correlator including: a first counter; a second counter; a correlator control module for changing the taps to a different set of tap weight values a plurality of times during each symbol period, and, for each set of tap weight values, causing the correlator to correlate the digitally-modulated signal to a first symbol and to a second symbol, thereby performing a sequence of correlations during each symbol period; and a detection and synchronization module, coupled to the first counter and the second counter, for determining a location, within a first symbol period, of correlations to the first pre-determined symbol and for determining a location, within a second symbol period, of correlations to the second pre-determined symbol, the detection and synchronization module including: