LTE多用户上行链路符号定时估计迭代算法

doi:10.3969/j.issn.1001-2400.2018.01.009

Abstract

Abstract:

In order to solve the problem of low accuracy and high complexity of symbol timing estimation in multi-user Long Term Evolution systems, a novel symbol timing estimation algorithmbased on block iteration correlationis proposedfor thewidely-usedlocalized subcarrier mapping.First, the most suitable pilot symbolis selected by pilot selection. Second, the segmented correlation and timing estimation are performed on the selected pilot. Third, the frequency domain correction is performed on the received pilot by using the first estimate. Finally, the algorithm is iterated and the final timing estimate is obtained.Simulation results show that,compared with the traditional first-pass search algorithm and cyclic prefix based time synchronization,the proposed algorithm improves the estimated performance by 20％～40％ and reduces the implementation complexity.

Key words: long term evolution, single carrier frequency division multiple-access, symbol timing estimation, iterative correlation, multi-user

SHAN Shuo;GONG Fengkui;ZHANG Hang. Symbol timing estimation iterative algorithm in the LTE multiuser uplink[J].Journal of Xidian University, 2018, 45(1): 48-54.

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Symbol timing estimation iterative algorithm in the LTE multiuser uplink

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