Patent ID: 6118807
Filing Date: 2000-09-12
Classification: H04B

Abstract:
A delay diversity processor for use in receiving direct sequence spread spectrum data comprising individual data bits of a data signal modulated by a multi-bit spreading code, the processor comprising:means for sampling said individual data bits of said data signal to provide a plurality of signal samples for each one of said individual data bits;means for correlating each one of said plurality of signal samples with a corresponding one of plural bins of said multi-bit spreading code to yield a plurality of correlated signal samples for each one of said individual data bits, wherein plural successive ones of said correlated signal samples correspond to one of said individual data bits in which some of said plural successive ones of said correlated signal samples represent false data and others of said plural successive ones of said correlated signal samples represent valid data;means for determining a magnitude value for each respective one of said plurality of correlated signal samples, each said magnitude value representing received signal strength only during a time slot corresponding to a respective one of said plural bins of said multi-bit spreading code, said determining means thereby providing plural magnitude values representing said plural bins for each one of said individual data bits;means for integrating said magnitude values over a period of time corresponding to receipt of a plurality of successive ones of said individual data bits to provide integrated magnitude values for each corresponding one of said magnitude values, each one of said integrated magnitude values representing received signal strength corresponding to a respective one of said plural bins of said multi-bit spreading code integrated over successive bit times, said integrating means thereby providing a separate integrated magnitude value for each one of said plural bins, said integrated magnitude values providing a measure of confidence indicating at least one of said plural successive ones of said correlated signal samples corresponding to at least one of said plural bins that likely represents valid data; andmeans for resetting each one of said integrated magnitude values within said integrating means in response to a signal provided following interruption of receipt of said direct sequence spread spectrum data.