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多普勒頻移對(duì)預(yù)均衡OFDM系統(tǒng)的性能影響

劉大為 唐友喜 李少謙

劉大為, 唐友喜, 李少謙. 多普勒頻移對(duì)預(yù)均衡OFDM系統(tǒng)的性能影響[J]. 電子與信息學(xué)報(bào), 2006, 28(3): 440-445.
引用本文: 劉大為, 唐友喜, 李少謙. 多普勒頻移對(duì)預(yù)均衡OFDM系統(tǒng)的性能影響[J]. 電子與信息學(xué)報(bào), 2006, 28(3): 440-445.
Liu Da-wei, Tang You-xi, Li Shao-qian. Impact of Doppler on BER Performance in TDD Pre-equalization OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(3): 440-445.
Citation: Liu Da-wei, Tang You-xi, Li Shao-qian. Impact of Doppler on BER Performance in TDD Pre-equalization OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(3): 440-445.

多普勒頻移對(duì)預(yù)均衡OFDM系統(tǒng)的性能影響

Impact of Doppler on BER Performance in TDD Pre-equalization OFDM Systems

  • 摘要: 研究了在多徑瑞利衰落環(huán)境中,多普勒頻移對(duì)二進(jìn)制相位調(diào)制時(shí)分雙工(TDD)預(yù)均衡正交頻分復(fù)用 (OFDM)系統(tǒng)的誤碼率性能影響。給出了存在多普勒影響的幅度相位預(yù)均衡處理的誤碼率解析表達(dá)式,并進(jìn)行了計(jì)算機(jī)仿真,仿真結(jié)果和理論分析相符。對(duì)于TDD預(yù)均衡OFDM系統(tǒng),多普勒效應(yīng)導(dǎo)致了信道的時(shí)變,并使預(yù)均衡處理產(chǎn)生誤差,且隨處理時(shí)延的增大,預(yù)均衡系數(shù)誤差越大,由此影響了預(yù)均衡系統(tǒng)的性能。提出了采用維納預(yù)測(cè)濾波器的方案以改善存在多普勒頻移的預(yù)均衡OFDM系統(tǒng)的性能。
  • [1] Keller T, Hanzo L. Adaptive multicarrier modulation: Aconvenient framework for time-frequency processing in wirelesscommunication. Proc. IEEE, 2000,88(5): 61 1 - 640. [2] Berezdivin R. Breinig R, Topp R. Next-generation wirelesscommunications concepts and technologies. IEEE CommunicationsMagazine, 2002,40(3): 108 - 116. [3] Coleri S, Ergen M, Puri A, Bahai A. Channel estimationtechniques based on pilot arrangement in OFDM systems[J].IEEETrans. on Broadcasting.2002,48(3):223- [4] Keller T, Hanzo L. Sub-band adaptive pre-equalised OFDMtransmission. Proceeding of IEEE Int. Conf. VehicularTechnology, Amsterdam, Netherlands, Sep, 1999: 334 - 338. [5] Witrisal K, Kim Y H, Prasad R, et a/.. Pre-equalization for theup-link of TDD OFDM systems. Proceeding of IEEE Int. Symp.on Personal, Indoor and Mobile Radio Communications, SanDiego, California, 2001, vo1.2: 93 - 98. [6] Tufvesson F, Faulkner M, Maseng T. Pre-compensation forRayleigh fading channels in time division duplex OFDM systems.Wireless Persona/ Communications, 200 1, 16(1): 2 1 - 33. [7] Stuber G L. Principles of Mobile Communication. 2d edition,Norwell, MA, USA, Kluwer Academic Publishers, 2000, %f3-0. [8] Liu Dawei, Tang Youxi, Li Shaoqian. Performance analysis ofTDD OFDM systems with phase and amplitude phasepre-equalization. Proceeding of lEEE Int. Conf. VehicularTechnology, Los Angeles, CA, USA, Sep. 2004. [9] Proakis J G Digital Communications. 3rd edition, New York,McGraw-Hill.lnc., 1995, 第五章..[lo] Haykin S. Adaptive Filter Theory. 3rd edition, NJ, USA, PrenticeHall, 1996, 第二章..[I I] ITU, Recommendation ITU-R M.1225, 1997.
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出版歷程
  • 收稿日期:  2004-07-27
  • 修回日期:  2004-12-10
  • 刊出日期:  2006-03-19

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