ENHANCED CROSS CORRELATION DETECTION OR MITIGATION CIRCUITS, PROCESSES, DEVICES, RECEIVERS AND SYSTEMS

摘要

A receiver (100) is provided for signals of different signal strengths and modulated with respective pseudorandom noise (PN) codes. The receiver (100) includes a correlator circuit (120) operable to correlate the signals with a selectable locally-issued PN code having a Doppler and a code lag to produce a peak, the correlator circuit (120) being subject to cross correlation with a distinct PN code carried by least one of the signals that can produce cross correlation; and a cross correlation circuit (370, 400) operable to generate a variable comparison value related to the cross correlation as a function of values representing a Doppler difference and a code lag difference between the locally-issued PN code and the distinct PN code, and to use the variable comparison value to reject the peak as invalid from cross correlation or to pass the peak as a valid received peak.

主权项

1. A cross correlation interference estimation circuit comprising:
a pseudo random noise (PN) code issuing circuit operable to issue a selected pair of different PN codes having a relative code lag and continually rotated relative to each other according to a relative Doppler shift; and a multiply accumulate circuit (MAC) operable to cross correlate the selected pair of PN codes having the relative code lag and continually rotated.