High speed CPFSK modulation mode IF transceiver design and implementation

Abstract

2CPFSK is a kind of significant modulation mode, which plays an important role in general aviation transportation supervision system, wireless data link telemetry of Unmanned Aerial Vehicle (UAV) and remote control system. Direct digital frequency synthesizer scheme achieves 2CPFSK low-power intermediate frequency (IF) digital modulation transmitter. This article gives the circuit principle diagram design, implementation scheme of hardware and the software simulation results. This design completes the digitization and modularization of the general aviation transportation supervision system, UAV wireless data link telemetry and remote control system. Through the application of air traffic supervision system, the digital IF modulator based on DDS chip to design is concentrated spectrum utilization, high signal transmission rate, more stable performance. In the case of low SNR, It can obtain lower bit error rate by using the IF sampling digital receiver demodulation scheme.