上行MIMO-SC-FDMA系统中频偏和信道联合估计算法
首发时间:2007-09-07
摘要:现有的频偏估计算法大多采用了训练序列相关的方法,基于这种方法推导了三种频偏和信道联合估计的算法:一是符号频域相关的频偏估计和最小二乘(LS)信道估计联合的算法,二是频偏和信道联合估计的最大似然(ML)算法,三是ML频偏估计和LS信道估计联合的算法。通过仿真,将上述算法在LTE TDD上行MIMO-SC-FDMA系统平台上实现,利用传输时隙中的导频符号进行频偏和信道的联合估计,并对这三种算法的误码率性能及适用范围进行了比较。
关键词: 上行多天线单载波频分多址系统 频偏和信道联合估计 频域相关 最小二乘 最大似然
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Joint Channel and Frequency Offset Estimation Algorithms for
Abstract:The present algorithms for frequency offset estimation almost exploit the method of training sequence correlation, which three algorithms of joint channel and frequency offset (JCFO) estimation were derived from: the first was the joint algorithm of pilot symbols correlation for frequency offset estimation and LS for channel estimation; the second was the joint ML algorithm for channel and frequency offset estimation; the third was the joint algorithm of ML for frequency offset estimation and LS for channel estimation . This contribution applies these methods to the LTE TDD uplink MIMO-SC-FDMA system, making use of the pilot symbols inserted in the transmission timeslot. Simulation results show their different performance and applicable range among three algorithms
Keywords: uplink MIMO-SC-FDMA system joint channel and frequency offset (JCFO) estimation correlation in frequency domain least square (LS) maximum likelihood (ML)
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No.1495114243111891****
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