信息与控制2012，Vol.41Issue(4)：459-464,471,7.DOI:10.3724/SP.J.1219.2012.00459
基于CORDIC差分鉴频解调算法的PCM/FM遥测接收系统
PCM/FM Telemetry Receiving System Based on CORDIC Differential Frequency Demodulation Algorithm
卢辉斌 1赵妍婷1
作者信息
- 1. 燕山大学信息科学与工程学院,河北秦皇岛066004
- 折叠
摘要
Abstract
Based on the fundamental principle of telemetry receiving system, the CORDIC (Coordinate Rotation Digital Computer) demodulation algorithm is comprehensively investigated. When the system input is an orthogonal IF (intermediate frequency) signal as well as its corresponding clock information, the system output is the instantaneous phase corresponding to the input transient signal. However, the anti-noise performance of the CORDIC demodulation is interfier to the coherent demodulation with the absence of channel delays. To this end, an improved CORDIC differential frequency discriminator demodulation algorithm in which the first-order difference is used in the digital domain for completing the signal frequency discrimination with the obtained instantaneous phase, is put forward to ensure the anti-noise performance of the signals in the channel without delays. Finally, the simulation results demonstrate the efficiency of the algorithm.关键词
中频信号/PCM/FM (pulse code modulation/frequency modulation)/遥测遥控/差分解调Key words
intermediate frequency signal/ PCM/FM (pulse code modulation/frequency modulation)/ telemetry and remote control/ differential demodulation
分类
信息技术与安全科学引用本文复制引用
卢辉斌,赵妍婷..基于CORDIC差分鉴频解调算法的PCM/FM遥测接收系统[J].信息与控制,2012,41(4):459-464,471,7.
