Patent ID: 8233518

Claim:
A method of reducing cross spectral terms of a spreading waveform for a navigation signal; the method comprising: (a) generating at least first portions of first and second Binary Offset Carrier (BOC) signals, having respective complex spectrums, with respective power spectral densities such that the additive combination of the first portions of the first and second BOC signals results in a first composite power spectral density having a cross spectral term with a first phase assignment; (b) generating at least second portions of the first and second BOC signals, having respective complex spectrums, with respective power spectral densities such that the additive combination of the second portions of the first and second BOC signals results in a second composite power spectral density having a cross spectral term with a second phase assignment; the second phase assignment being complementary to the first phase assignment; and (c) producing the spreading waveform by additively averaging, over a predetermined time interval, a predetermined number of the at least first portions of the first and second BOC signals and a predetermined number of the at least second portions of the first and second BOC signals.