南京航空航天大学学报2013，Vol.45Issue(1)：94-98,5.
CCSDS航天测控信号的简化非相干检测算法
Simplified Non-coherent Detection of Aerospace TT&C Signals Recommended by CCSDS
摘要
Abstract
A method for simplified non-coherent detection of continuous phase modulation (CPM) signals recommended by consultative committee for space data systems (CCSDS) in aerospace telemetry, tracking and command (TT&C) system is proposed due to the difficulty in carried phase recovery. Firstly, an optimal non-coherent metric for CPM is derived from the maximum-likelihood principle. Based on Laurent decomposition, the linear expressions of CPM signals are then applied to reduce the complexity of the non-coherent receiver. In consideration of phase continuity, multi-symbol intervals of received signals are considered in every branch metric to improve the performance of the detection. Constructed with few matched filters in the front-end, the simplified receiver uses the Viterbi algorithm to perform the sequence estimation. Simulation results for the simplified non-coherent detection of guassian minimum shift keying (GMSK) signals with L = 4 are given in the end. It is shown that when the observation interval is 8 bits long, the simplified detector has only around 1. 2 dB SNR to obtain the same BER of 1×10-4 as the coherent detector.关键词
航天测控/非相干检测/最大似然比准则/Laurent分解Key words
aerospace TT&C/ non-coherent detection/ maximum-likelihood principle/ Laurent decomposition分类
信息技术与安全科学引用本文复制引用
党小宇,李宝龙,王旭东..CCSDS航天测控信号的简化非相干检测算法[J].南京航空航天大学学报,2013,45(1):94-98,5.基金项目
国家自然科学基金(61172078)资助项目 （61172078）
航空科学基金(2010ZD52040)资助项目 （2010ZD52040）
中央高校基本科研业务费专项资金资助项目 （）
研究生创新基地开放基金(kfjj20110217)资助项目 （kfjj20110217）
江苏高校优势学科建设工程资助项目. （）
