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自適應(yīng)比特功率分配的MIMO OFDM系統(tǒng)性能

黎海濤,  張靖,  陸建華

黎海濤, 張靖, 陸建華. 自適應(yīng)比特功率分配的MIMO OFDM系統(tǒng)性能[J]. 電子與信息學(xué)報, 2004, 26(3): 416-420.
引用本文: 黎海濤, 張靖, 陸建華. 自適應(yīng)比特功率分配的MIMO OFDM系統(tǒng)性能[J]. 電子與信息學(xué)報, 2004, 26(3): 416-420.
Li Hai-tao, Zhang Jing, Lu Jian-hua. Study on the MIMO OFDM Systems with Adaptive Bit and Power Allocation[J]. Journal of Electronics & Information Technology, 2004, 26(3): 416-420.
Citation: Li Hai-tao, Zhang Jing, Lu Jian-hua. Study on the MIMO OFDM Systems with Adaptive Bit and Power Allocation[J]. Journal of Electronics & Information Technology, 2004, 26(3): 416-420.

自適應(yīng)比特功率分配的MIMO OFDM系統(tǒng)性能

Study on the MIMO OFDM Systems with Adaptive Bit and Power Allocation

  • 摘要: 該文首先分析了多天線發(fā)射和接收(MIMO)的OFDM系統(tǒng)模型。然后針對在多徑衰落信道下，OFDM中一些深度衰落的子載波降低了系統(tǒng)性能。該文把一般多載波系統(tǒng)中的自適應(yīng)比特功率分配算法推廣應(yīng)用到多天線OFDM系統(tǒng)中。同時研究了自適應(yīng)MIMO OFDM系統(tǒng)的頻譜效率。仿真結(jié)果表明，自適應(yīng)比特功率分配提高了MIMO OFDM的誤比特率性能和頻譜效率。
    Abstract: The multiple antenna Orthogonal Frequency Division Multiplexing(OFDM) system model is analyzed in this paper. Considering that Multiple-Input Multiple-Output(MIMO) channel can be separated into parallel subchannels by means of the singular value decomposition, and deep faded subcarriers may degrade the OFDM system perfor mance, the adaptive bit and power allocation for MIMO OFDM system are proposed. The analysis and simulation results show that the proposed adaptive MIMO OFDM improves bit error rate performance and spectral efficiency of the system.
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  • Raleigh G G, Cioffi J M. Space-temporal coding for wireless communications. In Proc. of Globecom, London, 1996: 1809-1814.[2]Ye Li, Chuang J C, Sollenberger N R. Transmitter diversity for OFDM systems and its impact on high rate data wireless networks. IEEE Trans. J. on SAC, 1999, 17(7): 1233-1243.[3]Chow P, et al.. A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels. IEEE Trans. Comm., 1995, COM-43(2): 773-775.[4]Campello J. Optimal discrete bit loading for multicarrier modulation systems. In Proc. of ISIT,Cambrige, USA, 1998: 193.[5]Campello J. Discrete bit loading for multicarrier modulation systems. [Ph.D Thesis], Stanford University, 1999.[6]Wong K, Lai S, Cheng R S, Letaief K B, Murch R D. Adaptive spatial-subcarrier trellis coded MQAM and power optimization for OFDM transmission. In Proc. of VTC, Boston, USA, 2000:2049-2053.[7]Chung S T, Goldsmith A J. Degrees of freedom in adaptive modulation: a unified view. IEEE Trans. on Comm., 2001, COM-49(9): 1561-1571.
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出版歷程
  • 收稿日期:  2002-10-22
  • 修回日期:  2003-04-24
  • 刊出日期:  2004-03-19

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