Research on telemetry modulation system

Abstract

To develop the effective aerospace telemetry communication system,aimed at the requirements of high-speed,high bandwidth,high efficiency and low interference of aerospace telemetly communication,the C-WQPSK(C-W quadrature phase-shift keying)modulation method is put forward.This method based on direct carrier QPSK,didn't consider baseband pulse signal,redesigned the modulating waveform,its phase angle jump and jump to change duration time all is changed.Also the C-WQPSK performance and theory analysis are given,and compared with QPSK and FQPSK,Through the MATLAB simulation experiment,this modulation method is correctness and effectiveness.