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首页> 外文会议>2010 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB 2010) >Coarse carrier and timing synchronization for interleaved OFDMA uplink system
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Coarse carrier and timing synchronization for interleaved OFDMA uplink system

机译：交错OFDMA上行系统的粗载波和定时同步

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摘要

In orthogonal frequency division multiple access (OFDMA) uplink system, estimations of time delay and carrier frequency offset (CFO) are both particularly challenging. In this paper, a coarse CFO and time delay estimation method is proposed for interleaved OFDMA uplink system. By exploiting the special scheme of interleaved OFDMA, the repetitive time-domain training symbol is designed, and the training sequences for different users have good autocorrelation and cross-correlation properties. Furthermore, the time delay and CFO estimation metrics are presented by making certain correlation between the received training symbol and the local sequence. Through searching peak of the proposed metrics, integral CFO of many subcarriers spaces for each user can be estimated, and then timing delay for each user can be found. Simulations illustrate the proposed estimation scheme can get good performance under multipath channel.1
机译：在正交频分多址（OFDMA）上行链路系统中，时间延迟和载波频率偏移（CFO）的估计都特别具有挑战性。本文提出了一种交错的OFDMA上行系统的粗略CFO和时延估计方法。通过利用交织OFDMA的特殊方案，设计了重复的时域训练符号，针对不同用户的训练序列具有良好的自相关和互相关特性。此外，通过在接收到的训练符号和本地序列之间进行一定的相关性来表示时间延迟和CFO估计量度。通过搜索建议指标的峰值，可以估算出每个用户的许多子载波空间的积分CFO，然后可以找到每个用户的时序延迟。仿真结果表明，该估计方案在多径信道下具有良好的性能。 1

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