摘要: |
针对脉冲位置相位翻转键控(Pulse Position Phase Reversal Keying,3PRK)调制的解调
问题,基于时频分析方法,对3PRK信号的伪魏格纳-威利(PWVD)分布特
性进行了详细分析,建立了3PRK调制信号相位突变与PWVD分布幅度的关系模型,利用该模型
提出了一种新的基于PWVD分布的3PRK调制解调算法,并对该解调算法性能进行了仿真分析。
仿真结果验证了该算法的有效性。 |
关键词: 超窄带解调 频带利用率 相位突变 3PRK调制 PWVD分布 |
DOI: |
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基金项目:国家自然科学基金资助项目(60772056) |
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An Ultra Narrow Bandwidth Demodulation Algorithm Based on Time Frequency Distribution |
WANG Hong-xing,WANG Hong-li,MAO Zhong-yang,WANG Yang |
(Department of Electronics and Information Engineering,Naval Aeronautical E
ngineering Institute,Yantai 264001,China;Graduate Management Unit,Naval Ae
ronautical Engineering Institute,Yantai 264001,China;Unit 94326 of PLA, Ji
nan 250023,China) |
Abstract: |
To solve the problem of 3PRK(Pulse Position Phase Reversal Keying) demodula
tion, the property of PWVD distribution of 3PRK m
odulation signals is analysed based on timefrequency analysis method. The rela
tion model b
etween abrupt phase change and amplitude of PWVD distribution of 3PRK signals is
proposed, and by using this model, a demodulation algorithm for 3PRK based on P
WVD distribution is presented. The validity of the algorithm is proved by simula
tion result. |
Key words: ultra narrow bandwidth(UNB) demodulation bandwidth efficiency abrupt phase ch
ange 3PRK modulation PWVD distribution |