| 摘要: |
| 针对正交频分复用（OFDM）系统，提出了一种低复杂度、高性能的载波频偏盲估计
方法。该方法充分利用载波频偏估计代价函数在一定区间内的单谷特性，采用黄金分割法搜
索载波频偏估计代价函数极值，从而大大降低其计算复杂度。最后对该方法和Tureli′s MU
SIC-like(TML)载波频偏估计方法在加性高斯白噪声信道和多径信道环境下进行了仿真，结
果表明,
在同等条件下该方法的计算复杂度大大低于TML载波频偏估计方法。 |
| 关键词: 正交频分复用；载波频偏 盲估计；黄金分割法；计算复杂度 |
| DOI： |
|
| 基金项目:“十一五”国防预研基金项目（1010704020501） |
|
| A high-efficiency blind carrier frequency offset estimation approach for OFDM systems |
| ZHOU De-fu,CAI Hui-zhi |
| () |
| Abstract: |
| A low-complexity and high-performance blind carrier frequency offsets
(CFO) estimation approach for Orthogonal Frequency Division Multiplexing（OFDM）
systems is proposed. This approach exploits
the intrinsic structure information of OFDM signals and the unimodality of the c
ost function for CFO estimation. It reduces the computational complexity by usin
g the golden section method in searching for the extremum of the cost function.
The performance of the proposed method is investigated with numerical simulatio
n. The results show that the new algorithm has much lower complexity than Tureli
′s MUSIC-like（TML） approach while achieves the same performance in both addit
ive white G
aussian noise(AWGN) and multipath fading channels. |
| Key words: orthogonal frequency division multiplexing carrier frequ
ency offset blind estimation golden section method computational complexity |
《电讯技术》编辑部 