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Volume 26 Issue 4
Apr.  2004
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Lu Jun-zhe, Zhang Hai-lin, Liu Zeng-ji. A Simple Differential Modulation Diversity in the Presence of Unknown Multipath[J]. Journal of Electronics & Information Technology, 2004, 26(4): 536-541.
Citation: Lu Jun-zhe, Zhang Hai-lin, Liu Zeng-ji. A Simple Differential Modulation Diversity in the Presence of Unknown Multipath[J]. Journal of Electronics & Information Technology, 2004, 26(4): 536-541.

A Simple Differential Modulation Diversity in the Presence of Unknown Multipath

  • Received Date: 2002-10-22
  • Rev Recd Date: 2003-04-30
  • Publish Date: 2004-04-19
  • Recent years, space-time coding technique is gotten more attention. However, the space-time coding application is often under non-frequeucy-selective channel while the channel knowledge is known. All of these constrains the application of space-time coding. This paper presents a differential modulation diversity used in the presence of unknown multi-path. The proposed technique utilizes orthogonal frequency division multiplexing (OFDM) transforming a frequency selective fading channel into multiple flat fading sub-channels. Based on this, a space-time-frequency configuration applied in unknown frequency selective fading channel is given. And this method is verified by the simulation results.
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  • Alamouti S M. A simple transmit diversity technique for wireless communications[J].IEEE J. on Select. Areas Comm.1998, 16(8):1451-1458[2]Naguib A F, Seshadri N, Calderbank R. Space-time coding and signal processing for high data rate wireless communications[J].IEEE Signal Processing Mag.2000, 17(3):76-92[3]Tarokh V, Seshadri N, Calderbank A R. Space-time codes for high data rate wireless communication: Performance analysis and code construction[J].IEEE Trans. on Info. Theory.1998, 44(2):744-765[4]Zou W Y, Wu Y. COFDM: an overview[J].IEEE Trans. on Broadcasting.1995, 41(1):1-8[5]Bingham J A C. Multicarrier modulation for data transmission: an idea whose time has come[J].IEEE Comm. Magazine.1990, 28(5):5-14[6]Agrawal D, Tarokh V, Naguib A, Seshadri N. Space-time coded OFDM. for high data rate wireless communication over wideband channels. Proc. 48th IEEE Vehicular Technology Conf., Ottawa,Canada, Mar. 1998: 2232-2236.[7]Mudulodu S, Paulraj A. A transmit diversity scheme for frequency-selective fading channels.IEEE Global Telecommunications Conference, Feb. 2000: 1089-1093.[8]Girish Ganesan, Petre Stoica. Differential modulation using space-time block codes[J].IEEE Signal Processing Letters.2002, 9(2):57-60[9]Cimini Jr. L J. Analysis and simulation of a digital mobile channel using orthogonal frequency division multiplexing. IEEE Trans. on Comm., 1985, COM-33(7): 665-675.[10]吕浚哲,张海林,何非,刘增基.无保护间隔的OFDM信道自适应均衡的一种新算法.电子学报,2002,30(7):941-944.[11]Ganesan G, Stoica P. Space-time diversity using orthogonal and amicable orthogonal designs.in Proc. Int. Conf. Acoustics, Speech, Signal Processing (ICASSP), Istanbul, Turkey, 2000:335-338.Lee K F, Williams D B. A space-time coded transmitter diversity technique for frequency selective fading channels. in Proc. IEEE Sensor Array and Multichannel Signal Processing Workshop,Cambridge, MA, March 2000: 149-152.
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