| GMSK调制技术及其在遥测中的应用分析 |
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| 引用本文： | 游莎莎,刘胜利,罗雷刚,张金荣. GMSK调制技术及其在遥测中的应用分析[J]. 无线电工程, 2011, 41(12): 41-43 |
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| 作者姓名： | 游莎莎 刘胜利 罗雷刚 张金荣 |
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| 作者单位： | 1. 北京跟踪与通信技术研究所,北京,100094
2. 清华大学,北京,100084 |
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| 摘 要： | 高斯最小偏移键控(GMSK)调制技术是一种高频谱效率的调制方式。研究了GMSK的基本原理及其调制解调技术。在仿真环境下对GMSK的调制、解调和同步模块建立了仿真模型,分析了其频谱和误码特性,并与脉冲编码调制-调频(PCM-FM)、四相移相键控(QPSK)比较。仿真结果表明GMSK具有更好的频谱特性,通过选择合适的高斯滤波器归一化带宽(BT)指数,可获得解调性能与带宽效率的折中。分析了GMSK调制解调技术在遥测中的应用。
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| 关 键 词： | GMSK 功率谱密度 BT 遥测 |
GMSK Modulation Technique and Its Application in Telemetry |
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| YOU Sha-sha,LIU Sheng-li,LUO Lei-gang,ZHANG Jin-rong. GMSK Modulation Technique and Its Application in Telemetry[J]. Radio Engineering of China, 2011, 41(12): 41-43 |
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| Authors: | YOU Sha-sha LIU Sheng-li LUO Lei-gang ZHANG Jin-rong |
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| Affiliation: | YOU Sha-sha1,LIU Sheng-li1,LUO Lei-gang2,ZHANG Jin-rong1(1.Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China,2.Tsinghua University,Beijing 100084,China) |
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| Abstract: | GMSK is a modulation technique with high spectrum-efficiency.The basic principle of its modulation and demodulation is analyzed.A simulation model of modulation,demodulation and synchronization is established.The characteristics of its power spectral density and bit error rate are analyzed,and it is compared with PCM-FM and QPSK.The simulation results show that GMSK has better spectral characteristics.By selecting a proper BT factor,it will achieve a compromise between demodulation performance and bandwidth... |
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| Keywords: | GMSK power spectral density BT telemetry |
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