| 摘要: |
| 在宽带OFDM系统中对正交空时分组码方案进行了研究，根据Almouti方案的译码原理给出了在正交空时分组码传输的频率选择性衰落信道条件下接收机输出瞬时信噪比的一般表达式，同时分两种情况进一步分析了其最小距离球界的符号差错性能。结果表明，在系统发送天线数、接收天线数及多径数目乘积较小的情形下，系统可以达到最大的分集增益。 |
| 关键词: 频率选择性衰落 正交空时分组编码 正交频分复用 分集增益 性能估计 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2006-03-22修订日期：2006-10-18 |
| 基金项目:教育部跨世纪优秀人才培养计划;新疆高等学校科研项目 |
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| Performance Estimation for Orthogonal Space-Time Block Codes in OFDM Systems |
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| Abstract: |
| The space-time block coded(STBC) OFDM scheme over wideband channels is described.A general expression of instant output signal-to-noise for orthogonal space-time block codes is shown in frequency selective fading channel.In addition,the minimum distance sphere upper bounds of this system is analysed accounting to two condition.Results show that this STBC-OFDM system can obtain most diversity gain when the product of the number of transmitter antennas,the number of receiver antennas and the number of selective fading diversity order is small. |
| Key words: frequency selective fading(FSF),orthogonal STBC,OFDM,diversity gain,performance estimation |
《电讯技术》编辑部 