一种改进的LTE上行信道估计方法研究

信道质量指示与混合自动重传请求应答是3GPPLTE系统中重要的反馈信息，在物理上行控制信道PUCCH中的传输采用联合编码和单独编码方式。当上行控制信息UCI单独编码时，CQI参考信号中嵌入ACK比特，减少了用于信道估计的参考信号并且降低了信道估计性能。针对此问题提出一种改进的上行信道估计解决方案，仿真结果表明了该算法在高速多普勒频移环境下依然具有较好的性能，该算法已应用于TD—LTE无线综合测试仪表的开发中。...

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Bibliographic Details
Published in电子技术应用 Vol. 38; no. 2; pp. 40 - 42
Main Author 李小文 任旭
Format Journal Article
LanguageChinese
Published 重庆邮电大学通信与信息工程学院,重庆,400065 2012
Subjects
UCI
上行控制信道
信道估计
参考信号
UCI
参考信号
信道估计
上行控制信道
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Summary:信道质量指示与混合自动重传请求应答是3GPPLTE系统中重要的反馈信息，在物理上行控制信道PUCCH中的传输采用联合编码和单独编码方式。当上行控制信息UCI单独编码时，CQI参考信号中嵌入ACK比特，减少了用于信道估计的参考信号并且降低了信道估计性能。针对此问题提出一种改进的上行信道估计解决方案，仿真结果表明了该算法在高速多普勒频移环境下依然具有较好的性能，该算法已应用于TD—LTE无线综合测试仪表的开发中。
Bibliography:UCI ; reference signal ; channel estimation ; physical uplink control channel
Li Xiaowen, Ren Xu （College of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China）
11-2305/TN
Channel quality indicator and hybrid automatic repeat-request acknowledgement are important feedback information in system of 3GPP LTE, adopted joint or separate coding when transmitted via Physical uplink control channel. When UCI adopted type of joint coding, performance of channel estimation will decline and the number of reference signal will decrease because the ACK/NAK bits are embedded in one of the CQI reference signals. An improved method for uplink channel estimation is proposed for this issue. Simulation results show the effectiveness of the algorithm int the invironment of high speed removement, which has been applied to TD-LTE wireless integrated test instrument.
ISSN:0258-7998
DOI:10.3969/j.issn.0258-7998.2012.02.016