多通道分组SFBC-OFDM传输方案  

Multi-channel grouping SFBC-OFDM transmission scheme

作　　者：王小龙[1] 水鹏朗[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2007年第4期532-535,共4页Systems Engineering and Electronics

基　　金：国家优秀博士论文作者专项基金资助课题(200139);武器装备预研基金项目资助课题(51407030203DZ0119)

摘　　要：空频分组编码(SFBC)结合正交频分多路复用(OFDM)的发射分集方案(SF-OFDM)利用空间分集可以有效克服快衰落信道造成的不利影响,提高系统性能。对SF-OFDM发射分集方案做了简要分析,提出了一种多通道分组SFBC-OFDM发射分集方案。在发射端采用分组结构的SFBC结合OFDM技术,在接收端利用OFDM中子载波选择矩阵进行分组干扰抑制,然后对每一通道SFBC进行传统的空频分组码解码。这种传输方案克服了发射天线数目较大时传统SFBC编码非常复杂的缺点,极大地降低了编码的复杂度。分析和仿真结果验证了该方法的有效性。Orthogonal Frequency-Division Multiplexing （OFDM） transmitter diversity scheme based on Space-Frequency Block Code （SFBC） can effectively overcome detrimental influences induced by fast fading channels and improve system performance by utilizing space diversity. The conventional SF-OFDM transmitter diversity scheme in brief is analyzed, and proposes a new SFBC-OFDM transmitter diversity scheme which utilizes multi-channel parallel transmissions. At the transmitter, grouping SFBC is combined with OFDM. The subcarrier selection matrices is used for the suppressing of grouping interference at the receiver, then the traditional decoding method for SFBC is utilized for each channel. The scheme overcomes the disadvantage of high complexity of conventional SFBC coding with large antenna number, and greatly reduces the coding complexity. The analysis and simulation results confirm the validity of the proposed method.

关 键 词：正交频分多路复用 通信系统 空间分集 数据处理 

分 类 号：TN911[电子电信—通信与信息系统]