基于块调制的MIMO-OFDM系统

王杰令; 杨宏; 易克初; 刘祖军

doi:10.3724/SP.J.1146.2008.01815

基于块调制的MIMO-OFDM系统

doi: 10.3724/SP.J.1146.2008.01815

王杰令^①,,
杨宏,
易克初^①,
刘祖军^①

计量
- 文章访问数: 3400
- HTML全文浏览量: 109
- PDF下载量: 765
- 被引次数: 0
出版历程
- 收稿日期: 2008-12-29
- 修回日期: 2009-06-30
- 刊出日期: 2010-01-19

Block-Modulated Based MIMO-OFDM System

摘要

摘要: 该文在MIMO-OFDM系统中提出基于块调制的OFDM算法，降低了循环前缀(CP)所占的系统开销。在每个发射天线，将P个OFDM符号联合调制组帧后共用一个CP，到达接收天线后，接收帧经过分解可得到P个接收数据块，各数据块无相互间干扰。其中第p个接收数据块等于各个发射天线的第p个OFDM符号通过MIMO信道后到达接收天线的和，该文算法与传统MIMO-OFDM系统本质上传输方式相同，因而传输性能也相同，而频带效率则明显提高。
- 正交频分复用; 频率选择性衰落; 多天线系统; 频带效率
Abstract: The block-modulated based OFDM algorithm is presented in MIMO-OFDM system to reduce the cost that is taken up by the Cyclic Prefix (CP). At each transmitter antenna, P OFDM data blocks are modulated jointly and framed together to use one single CP, and after the received frame at each receiver antenna is decomposed, P received blocks are obtained without inter-block interference where the pth block is equal to the sum of the pth OFDM data block in each transmitter passing through the MIMO channel. While the transmission mode and performance of the scheme proposed are equivalent to that of conventional MIMO-OFDM system, the band efficiency is improved dramatically.

HTML全文

参考文献(1)

[1] Peng Y, Armour M D, and McGeehan J P. Aninvestigation of dynamic subcarrier allocation inMIMO-OFDMA systems [J].IEEE Transactions onVehicular Technology.2007, 56(5):2990-3005 [2] Kim H, Kim J, and Yang S, et al.. An effective MIMO-OFDM system for IEEE 80222 WRAN channels[J].. IEEETransactions on Circuits and Systems II.2008, 55(8):821-825 [3] 梁学俊, 朱光喜, 曹汐等. 基于信道反馈的MIMO-OFDM 系统多用户分集研究[J].电子与信息学报.2008, 30(11):2570-2574浏览 [4] Gao F and Zeng Y. Robust subspace blind channelestimation for cyclic prefixed MIMO OFDM systems:algorithm, identifiability and performance analysis [J].IEEE Journal on Selected Areas in Communications.2008,26(2):378-388 [5] 张建华, 冯冲, 等. 用于MIMO-OFDM 系统的定时同步算法[J]. 北京邮电大学学报, 2009, 32(1): 121-124.Zhang Jian-hua and Feng Chong, et al.. Timesynchronization algorithm for MIMO OFDM systems [J].Journal of Beijing University of Posts andTelecommunications, 2009, 32(1): 121-124. [6] Park C and Kim G. Efficient DMT/OFDM transmissionwith insufficient cyclic prefix [J]. IEEE CommunicationsLetters, 2004, 8(9): 576-578. [7] Xia X G. Precoded and vector OFDM systems robust tochannel spectral nulls and with reduced cyclic prefix lengthin single transmit antenna systems [J].IEEE Transactionson Communications.2001, 49(8):1363-1374 [8] Prasad V G S and Hari K V S. Interleaved orthogonalfrequency division multiplexing (IOFDM) system [J].IEEETransactions on Signal Processing.2004, 52(6):1711-1721 [9] Wang X, Wu Y, and Chouinard J. On the comparison ofthe conventional MSE-OFDM systems [C]. Proceedings ofIEEE Global Communications Conference (Globecom), SanFrancisco, CA, Dec. 2003, Vol.1: 35-39. [10] Wang X, Wu Y, and Chouinard J. On the design andperformance analysis of multisymbol encapsulated OFDMsystems [J].IEEE Transactions on Vehicular Technology.2007, 55(3):990-1012 [11] YI K, Gu C, and Wang C T. Continuous wave timedivision multiplexing and its applications [J]. IEICETransactions on Communications, 2005, E88-B(11):4266-4273. [12] Chang C and Chen K. Frequency-domain approach tomultiuser detection in DS-CDMA communications [J].IEEE Communications Letters.2000, 4(1):331-333 [13] Dinis R, Falconer D, and Lam C, et al.. A multiple accessscheme for the uplink of broadband wireless systems [C].Globecom 2004, IEEE Communications Society, Dallas,USA, Jun. 2004, Vol.1: 3808-3812. [14] Lin D and Chiang P. Performance analysis of two-branchtransmit diversity block-coded OFDM systems intime-varying multipath Rayleigh-fading channels [J].IEEETransactions on Vehicular Technology.2005, 54(1):136-148 [15] 赵力, 孙献璞, 张海林. 用于MMSE 合并的受约束LMS 算法分析[J]. 西安电子科技大学学报, 2008, 35(6): 973-977.Zhao Li, Sun Xian-pu, and Zhang Hai-lin. Analysis of aconstrained LMS algorithm for MMSE combination [J].Journal of Xidian University, 2008, 35(6): 973-977.

施引文献

资源附件(0)

访问统计