Implementation of training-sequence based carrier frequency offset estimator with multi-correlation-lag
Implementation of training-sequence based carrier frequency offset estimator with multi-correlation-lag
复制标题
基于训练序列的多相关滞后载波频偏估计器的实现
DOI：
10.1109/chinacom.2009.5339877
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Jian Song
中科院分区：
文献类型：
--
作者：
Xue Dong;Kewu Peng;Jian Song
提出了一种多相关滞后载波频偏估计器的实现方法。该方法突破了单训练序列长度的限制，降低了估计器的硬件成本。一个新设计的自动频率控制（AFC）环也提出了实现更好地利用多个估计和更好的收敛速度和估计精度之间的权衡。采用所提出的设计，基于训练序列的多相关滞后的TDS-OFDM系统的CFO估计器实现了现场可编程门阵列（FPGA）。结果表明，该方法可以显著提高估计性能和硬件效率.
Implementation of a carrier frequency offset (CFO) estimator with multiple correlation lags is presented in this paper. The proposed implementation breaks through the length constraint of single training sequence, and reduces the hardware cost of the estimator. A newly designed Automatic Frequency Control (AFC) loop are also proposed to achieve better utilization of multiple estimates and better trade-off between convergence rate and estimation accuracy. Employing the proposed designs, a training-sequence based CFO estimator with multi-correlation-lag for TDS-OFDM system is implemented using field programmable gate array (FPGA). As shown in the results, the proposed implementation can substantially improve estimation performance and hardware efficiency.