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基于預(yù)測的OFDM系統(tǒng)迭代聯(lián)合信道估計(jì)與符號(hào)檢測算法

張彭,  畢光國,  曹秀英

張彭, 畢光國, 曹秀英. 基于預(yù)測的OFDM系統(tǒng)迭代聯(lián)合信道估計(jì)與符號(hào)檢測算法[J]. 電子與信息學(xué)報(bào), 2005, 27(9): 1437-1440.
引用本文: 張彭, 畢光國, 曹秀英. 基于預(yù)測的OFDM系統(tǒng)迭代聯(lián)合信道估計(jì)與符號(hào)檢測算法[J]. 電子與信息學(xué)報(bào), 2005, 27(9): 1437-1440.
Zhang Peng, Bi GuangGuo, Cao XiuYing. An Iterative Joint Channel Estimation and Symbol Detection Algorithm Based on Prediction for OFDM Systems[J]. Journal of Electronics & Information Technology, 2005, 27(9): 1437-1440.
Citation: Zhang Peng, Bi GuangGuo, Cao XiuYing. An Iterative Joint Channel Estimation and Symbol Detection Algorithm Based on Prediction for OFDM Systems[J]. Journal of Electronics & Information Technology, 2005, 27(9): 1437-1440.

基于預(yù)測的OFDM系統(tǒng)迭代聯(lián)合信道估計(jì)與符號(hào)檢測算法

An Iterative Joint Channel Estimation and Symbol Detection Algorithm Based on Prediction for OFDM Systems

  • 摘要: 該文在現(xiàn)有的OFDM系統(tǒng)聯(lián)合迭代信道估計(jì)與符號(hào)檢測算法的基礎(chǔ)上,根據(jù)信道響應(yīng)的時(shí)域相關(guān)性,將預(yù)測方法引入迭代信道估計(jì),對(duì)其進(jìn)行改進(jìn).提出一類基于對(duì)初始信道估計(jì)值進(jìn)行預(yù)測的迭代信道估計(jì)算法.進(jìn)而分別用兩種預(yù)測方法進(jìn)行仿真并與傳統(tǒng)迭代算法進(jìn)行比較.仿真結(jié)果表明:該方法與傳統(tǒng)算法相比,加快了迭代收斂速度,降低了系統(tǒng)誤碼率.在復(fù)雜度增加不大的前提下,提高了系統(tǒng)性能.
    Abstract: In this paper, an iterative joint channel-estimation and symbol-detection algorithm based on prediction is presented for orthogonal frequency-division multiplexing systems. Considering the correlation between impulse responses, the prediction method is introduced into the iterative channel estimation. The initial channel value of iterative estimation is predicted in each symbol. Several prediction methods are simulated and compared. The simulation results show that contrasted to the conventional scheme the proposed algorithm improves the convergence capability and system performance dramatically.
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  • Li Ye. Pilot-symbol-aided channel estimation for OFDM in wireless systems[J].IEEE Trans. on Vehicular Technology.2000,49(4):1207-[2]Moreili M, Mengali U. A comparison of pilot-aided channel estimation methods for OFDM systems[J].IEEE Trans. on Signal Processing.2001, 49(12):3065-[3]Edfords O, Sandell M, Van De Beek, Wilson S K, Boriesson P O.OFDM channel estimation by singular value decomposition,IEEE Trans. on Communications, 1998, 46(7): 931 - 939.[4]Edfords O, Sandell M, Van De Beek, et al.. Analysis of DFT-based channel estimators for OFDM[J].Wireless Personal Communications.2000, 12(1):55-[5]Park Seung Young, Kim Yeun Gu, Kang Chung Gu. Iterative receiver for joint detection and channel estimation in OFDM systems under mobile radio channels[J].IEEE Trans. on Vehicular Technology.2004, 53(2):450-[6]Han Bing, Wang Jianming, Gao Xiqi, et al.. An iterative joint channel estimation and symbol detection algorithm for OFDM system[J]. Journal of China Institute of Communications, 2003,24(8): 58 - 64.[7]Han Bing, Gao Xiqi, You Xiaohu, Wang Jianming, Costa E. An iterative joint channel estimation and symbol detection algorithm applied in OFDM system with high data to pilot power ratio.IEEE International Conference on Communications, 11 - 15 May2003, vol.3:2076 - 2080.[8]Hoeher P. A statistical discrete-time model for the WSSUS multipath channel[J].IEEE Trans. on Vehicular Technology.1992,41(4):461-[9]Jacks W C. Microwave Mobile Communications. New York:wiley, 1974, chapterl: 13 - 77.
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出版歷程
  • 收稿日期:  2004-07-01
  • 修回日期:  2004-10-15
  • 刊出日期:  2005-09-19

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