Mathematical Analysis of Frequency Modulation Symmetric Polarized Diversity Phase-locked Loop

In the aerospace measuring and controlling area,especially in rocket telemetry receiver system, polarization diversity is used to fight against polarization signal fading, improve channel reliability and improve the quality of the received signal. Firstly, mathematical models of phase-locked loop, differential mode loop and common loop were demenstrated. Then, theoretical analysis was given in detail and the results indicated that interaction of differential mode loop and common mode loop the carrier capture and telemetry demodulation function can be finished, which can provide theoretical support for further analyzing, simulating and designing diversity symmetric phase-locked loop.