一种用于短波通信的新的频域差分解调器

李旭明; 吴乐南

doi:10.3724/SP.J.1146.2006.01189

一种用于短波通信的新的频域差分解调器

doi: 10.3724/SP.J.1146.2006.01189

基金项目:

国家自然科学基金(60072013，60472054)资助课题

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出版历程
- 收稿日期: 2006-08-11
- 修回日期: 2007-04-05
- 刊出日期: 2008-03-19

A Novel Frequency Domain Differential Demodulator in Application to HF Communication

摘要

摘要: 在短波通信中，传输信号遭受延时`扩展、时变干扰以及接收机加性高斯噪声的影响。常规的差分解调器在恶劣的短波信道环境下性能很差。该文提出一种新的频域差分解调器，通过盲相位估计来消除延时扩展造成的相位误差的影响。仿真了常规差分解调器和新的差分解调器在恶劣短波信道环境下的性能对比。结果表明在快速衰落短波信道环境下，新的频域差分解调器的性能优于传统的差分解调器。
- 正交频分复用; 时变多径信道; 频域差分解调; 短波通信
Abstract: In HF communication, the signals suffer from the effect of delay spread, time-varying interference and additive Gaussian noise. The performance of conventional differential demodulator is very poor in bad HF channel. A novel frequency domain differential demodulator is proposed which employs blind phase estimation to cancel the effect of phase error caused by delay spread. Its performance is studied through simulation in bad HF channel, and comparing with the conventional differential demodulator is described. Simulation results show that the proposed technique outperforms conventional differential demodulators in performance of transmission over the fast fading HF channel.

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参考文献(1)

ETSI ES 201 980 v1.2.2 (2003-04) ETSI standard: digitalradio mondiale (DRM); system specification.[2]Kurpiers A F. Improved channel estimation and demodulationfor OFDM HF ionospheric channels, Proceeding of Eighth IEEHF Radio Systems and Techniques, London, 2000: 65-69.[3]Xu Shuzheng, Yang Huazhong and Wang Hui. Anapplication of DAPSK in HF communications. IEEECommunications Letters, 2005, 9(7): 613-615.[4]European standard (telecommunications series), radiobroadcasting systems; digital audio broadcasting (DAB) tomobile and portable receivers, ETSI EN 300 401 V 1.3.3(2001-05), 2001.European standard (telecommunications series), digital videobroadcasting (DVB); Framing structure, channel coding andmodulation for digital terrestrial television, ETSI EN 300 744v1.4.1 (2001-01), 2001.[5]Zhong K, Tjhung T T, and Adachi F. A general SER formulafor an OFDM systems with MDPSK in frequency domainover Rayleigh fading channel[J].IEEE Trans. on Commun.2004, 52(4):584-594[6]Song Lijun, Tang Youxi, and Li Shaoqian. BER performanceof differential demodulation OFDM system in multipathfading channels, GLOBECOM, Burlington, 2003: 1-5.[7]Li Xuming and Wu Lenan. Differential demodulation ofOFDM based on SOM., Proc. ICNC(2), Changsha, 2005:468-475.[8]Makrakis D, Mathiopoulos P, and Bouras D. Optimaldecoding of coded PSK and QAM signals in correlated fastfading channels and AWGN: a combined envelope, multipledifferential and coherent detection approach[J].IEEE Trans. onCommun.1994, 42(1):63-75[9]Kohonen T. Self-orgnized map[J].Proc. IEEE.1990, 78(9):1464-1480

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