Dual-frequency constant envelope multiplex with non-equal power allocation for GNSS

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 is 3, a more concise 12-PSK-like signal waveform expression and a look-up table for phase states are given. Numerical validation shows the availability of this technique.