Patent ID: 8649415

Claim:
A receiver for receiving and processing a navigation signal comprising a ranging code modulated by a spreading waveform; said spreading waveform comprising at least a first portion and at least a second portion; said first portion comprising an additive combination of first and second respective portions of first and second Binary Offset Carrier (BOC) signals, having respective complex spectrums, with respective power spectral densities, said additive combination exhibiting a first composite power spectral density having a cross spectral term with a first phase assignment; said second portion comprising an additive combination of first and second respective portions of the first and second BOC signals, having respective complex spectrums, with respective power spectral densities, said additive combination exhibiting a second composite power spectral density having a cross spectral term with a second phase assignment; said second phase assignment being complementary to the first phase assignment; the receiver comprising an antenna for receiving the navigation signal; an RF processor for processing the received navigation signal and producing digitised received signal samples therefrom; and a signal replica generator adapted to output a replica signal produced from the outputs of at least one or more of a carrier replica generator, a ranging code generator and a spreading waveform replica generator; and a correlation processor for correlating the replica signal and the digitised received signal samples; wherein the at least current respective portions of said first and second BOC signals comprises a predetermined number of chips of the first and second BOC signals.