Low signal/noise missile/satellite transponder tracking having receiver demodulator with detected phase/frequency central/first lateral line modulation spectrum obtained and modulation signal applied

摘要

The transponder signal frequency transposition reception method for low signal to noise ratio deduces the modulating frequency and phase as well as the modulation index, frequency, phase and energy differences measured at reception. The measurement is between the central and first lateral line of the transposed modulation spectrum , using a receiver demodulation carrier frequency modulated by a modulating signal having the detected phase and frequency, with a modulation level corresponding to the one obtained. The technique improves the received signal to noise ratio.