| 遥测信号检测中多普勒影响及其补偿研究 |
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| 引用本文： | 王志国,吴海洲,王鹏毅. 遥测信号检测中多普勒影响及其补偿研究[J]. 无线电工程, 2013, 43(1): 22-24 |
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| 作者姓名： | 王志国 吴海洲 王鹏毅 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北石家庄,050081 |
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| 摘 要： | 采用帧头相关法可实现航天测控中低信噪比遥测信号检测,但目标的高动态特性将降低相关积累增益。为了解决遥测信号相关检测中多普勒频移补偿的难题,介绍了帧头相关检测的实现方法,分析了多普勒频移对检测峰值的影响,在对比多种补偿方法的条件下,提出了多路补偿的方案。仿真结果表明:所提方法能实现在低信噪比、高动态条件下调频遥测信号的多普勒频移补偿。
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| 关 键 词： | 调频遥测 帧头相关检测 多普勒频移 多路补偿 |
Research on Doppler Influence on Telemetry Signal Detection and Its Compensation |
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| WANG Zhi-guo , WU Hai-zhou , WANG Peng-yi. Research on Doppler Influence on Telemetry Signal Detection and Its Compensation[J]. Radio Engineering of China, 2013, 43(1): 22-24 |
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| Authors: | WANG Zhi-guo WU Hai-zhou WANG Peng-yi |
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| Affiliation: | (The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China) |
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| Abstract: | In aerospace TT&C,frame correlating detection can realize low signal-to-noise ratio signal detection.But the high-dynamic characteristic of target tends to decrease the accumulation gain.To address the challenge of Doppler frequency-shift compensation in correlation detection of telemetry signal,the realization method of frame correlation detection is introduced.Then the effect of Doppler frequency-shift on detection peak value is analyzed.Based on a comparison of several Doppler frequency-shift compensation methods,the multi-channel compensation method is proposed.The simulation results show that the Doppler frequency-shift compensation of low-SNR and high-dynamic frequency modulated telemetry signal can be realized by the proposed method. |
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| Keywords: | frequency modulated telemetry frame correlation detection Doppler frequency-shift multi-channel compensation |
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