非理想反馈链路下的发送天线选择系统性能分析

陈明; 朱近康

doi:10.3724/SP.J.1146.2005.00902

非理想反馈链路下的发送天线选择系统性能分析

doi: 10.3724/SP.J.1146.2005.00902

陈明,
朱近康

基金项目:

国家自然科学基金重大项目(60496314)和863国家重大项目(2003AA123310)资助课题

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出版历程
- 收稿日期: 2005-07-26
- 修回日期: 2006-02-15
- 刊出日期: 2007-02-19

Performance Analysis of Transmit Antenna Selection with Imperfect Feedback

摘要

摘要: 该文提出了一种近似分析的方法，得到了非理想反馈链路下的发送天线选择(Transmit Antenna Selection, TAS)系统的符号差错概率(Symbol Error Probability，SEP)。这种近似的方法适用于采用任意正交空时分组码的TAS系统，并且对于发送端选择两天线的系统还给出了SEP的显式表达式。该文研究表明TAS系统的发送分集度由所选天线子集中最大的矩幅序号决定。蒙特卡罗仿真验证了当信噪比较高时，由该文近似方法得到的系统SEP和理论上的SEP非常吻合。
- 发送天线选择;正交空时分组码;非理想反馈;符号差错概率;发送分集度
Abstract: The performance of Transmit Antenna Selection (TAS) with imperfect feedback is analysed in this paper. An asymptotic method is presented to approach the Symbol Error Probability(SEP) of TAS with imperfect feedback. This method can be applied to arbitrary Orthogonal Space Time Block Code (OSTBC) scheme with TAS, and the generalized formula of SEP is also presented for Alamouti TAS scheme with imperfect feedback. It is concluded that the transmit diversity order is equal to the largest norm-amplitude ordinal number of the antenna within the selected antenna subset. It is validated by Monte-Carlo simulation that the presented asymptotic SEP match well with the theoretical SEP at high SNR.

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