A positioning system receiver is disclosed. The positioning system
receiver includes an antenna for receiving radio frequency (RF) signals.
The positioning system receiver also includes a radio frequency front end
system configured to convert the received RF signals into intermediate
frequency signals. The positioning system receiver further includes a
digital processing and correlation system, receiving the intermediate
frequency signals and including a plurality of taps on the
autocorrelation function main lobe and a plurality of taps on at least
one of the autocorrelation function side lobes. The digital processing
and correlation system uses the signals received from the taps in a dot
product detector algorithm to improve the signal-to-noise ratio of the
receiver system.