摘要
本文提出了一种针对IEEE802.11a OFDM系统频偏综合估计算法。该算法分两个过程对OFDM频偏进行估计:捕获过程和跟踪过程。计算机仿真表明,该算法在不降低估计误差均方差的情况下,相对于其它使用前导字进行频偏跟踪的算法能够提供更大的频偏估计范围,具有更高的效率和更低的计算复杂度。
A carrier frequency offset synthetic estimation algorithm for IEEE802.11a OFDM frame is presented. The proposed algorithm estimates the frequency offset of the OFDM frame in two steps: acquisition and tracking step. It is proved by simulation result that this algorithm has a larger estimation range, higher throughput efficiency and lower computational complexity than other algorithms using preamble structure for frequency offset estimation without degrading the variance of the estimation error.
出处
《电路与系统学报》
CSCD
2002年第2期110-114,共5页
Journal of Circuits and Systems
基金
国家高技术研究发展计划863资助项目(2001AA413610)
关键词
正交频分复用
前导字
无线局域网
载波频偏
orthogonal frequency division multiplexing (OFDM)
preamble
Wireless LAN (WLAN)
carrier frequency offset (CFO).
