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A constant envelope multiplex technique for radionavigation that combines four independent spreading codes with non-equal power splitting into a spectrum-split integrated signal is presented. This technique can be implemented via a transmitting waveform obtained by a table look-up as a function of the code bits. For the case that the power ratio between the in-phase and the quadrature-phase components...
A modulation for global navigation satellite systems (GNSS) signals called quadrature multiplexed BOC (QMBOC), with the corresponding correlation receiver and constant envelope multiplexing schemes, is presented. Placing the narrowband BOC component and the wideband BOC component in phase quadrature, QMBOC modulation remains an MBOC spectral constraint, which eliminates the cross-term in the autocorrelation...
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