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一種基于最小誤碼率的OFDM自適應(yīng)比特及功率分配算法

薛金銀,  焦秉立

薛金銀, 焦秉立. 一種基于最小誤碼率的OFDM自適應(yīng)比特及功率分配算法[J]. 電子與信息學(xué)報, 2006, 28(7): 1279-1281.
引用本文: 薛金銀, 焦秉立. 一種基于最小誤碼率的OFDM自適應(yīng)比特及功率分配算法[J]. 電子與信息學(xué)報, 2006, 28(7): 1279-1281.
Xue Jin-yin, Jiao Bing-li. A Minimum Bit Error Rate Loading Algorithm for OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1279-1281.
Citation: Xue Jin-yin, Jiao Bing-li. A Minimum Bit Error Rate Loading Algorithm for OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1279-1281.

一種基于最小誤碼率的OFDM自適應(yīng)比特及功率分配算法

A Minimum Bit Error Rate Loading Algorithm for OFDM Systems

  • 摘要: OFDM自適應(yīng)調(diào)制技術(shù)根據(jù)各子載波在頻率選擇性衰落信道中不同的瞬時增益，動態(tài)地分配數(shù)據(jù)比特和發(fā)射功率，可以優(yōu)化系統(tǒng)性能，提高頻譜效率。該文主要研究OFDM系統(tǒng)發(fā)射功率和傳輸比特數(shù)不變時誤碼率最小化的自適應(yīng)(MA)算法。提出一種以注水門限為迭代參數(shù)的MA算法，并引入有記憶步長迭代法，提高算法的穩(wěn)定性。仿真結(jié)果表明，與過去的算法相比，該算法能以較低的復(fù)雜度獲得更好的性能。
    Abstract: An efficient power and bit allocation algorithm is proposed for wireless OFDM systems aiming at minimization of the bit error rate under the constraint of total transmit power and data rate. The algorithm is based on the water-filling approach and adopts a new iterative method to improve its stability. Simulation results show the proposed algorithm has a better performance and a lower computational complexity compared to the previous ones.
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  • Bingham J A C. Multicarrier modulation for data transmission: an idea whose time has come[J].IEEE Commun. Mag.1990, 28(5):5-[2]Chow P S, Cioffi J M, Bingham J A C. A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels[J].IEEE Trans. on Commun.1995, 43(2/3/4):773-[3]Fischer R F H, Huber J B. A new loading algorithm for discrete multitone transmission[J].IEEE Globecom96, London, Nov. 18-2.1996, 1:724-[4]Hughes-Hartogs D. Ensemble modem structure for imperfect transmission media. U.S. Patents Nos. 4,679,227 (July 1987), 4,731,816 (March 1988), and 4,833,706 (May 1989).[5]Leke A, Cioffi J M. A maximum rate loading algorithm for discrete multitone modulation systems[J].IEEE Globecom97, Phoenix, Arizona USA, Nov. 3-.1997, 3:15141518-[6]Wyglinski A M, Labeau F, Kabal P. An efficient bit allocation algorithm for multicarrier modulation. IEEE WCNC, Atlanta, GA USA, Mar. 21-25, 2004, 2: 11941199. .[7]Jang J, Lee K B, Lee Y H. Transmit power and bit allocations for OFDM systems in a fading channel. IEEE Globecom, San Francisco, CA USA, Dec. 1-5, 2003, 6: 858862. .[8]Krongold B S, Ramchandran K, Jones D L. Computationally efficient optimal power allocation algorithms for multicarrier communication systems. IEEE Trans. on Commun., 2002, 50(1): 23.27.[9]Goldfeld L, Lyandres V, Wulich D. Minimum BER power loading for OFDM in fading channel[J].IEEE Trans. on Commun.2002, 50(11):1729-[10]Piazzo L. Optimum adaptive OFDM systems. Euro. Trans. Telecomms., 2003, 14: 205.212.[11]Cover T M.[J].Thomas J A. Elements of Information Theory. New York: John Wiley Sons.1991,:-[12]薛金銀，焦秉立. 一種改進(jìn)的OFDM自適應(yīng)比特及功率分配算法. 北京大學(xué)學(xué)報，2006，42(1).[13]Chung S T, Goldsmith A J. Degrees of freedom in adaptive modulation: a unified view[J].IEEE Trans. on Commun.2001, 49(9):1561-[14]ETSI Normalization Committee. Channel models for HIPERLAN/2 in different indoor scenarios. Doc. 3ER1085B, Eur. Telecommun. Standards Inst., Sophia-Antipolis, France, 1998.
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出版歷程
  • 收稿日期:  2004-11-26
  • 修回日期:  2005-04-11
  • 刊出日期:  2006-07-19

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