摘要
对适用于TDS-OFDM系统的两种载波频偏估计算法进行了研究,分析其性能和算法复杂度,给出了两种算法在AWGN信道和多径信道下的仿真结果。分析和仿真结果表明:基于自相关的算法抗噪声能力强,估计精度不受频偏大小的影响;基于累加的算法在小频偏范围内的性能与基于自相关的算法近似,且复杂度更低。
Two algorithms of carrier frequency offset coherent estimation for TDS-OFDM systems are analyzed and compared in this paper. Estimation performances in AWGN and multi-path channels are simulated. Analysis and simulations show that the algorithm based on auto-correlation has higher estimation accuracy and is not sensitive to frequency offset; the algorithm based on accumulation has lower complexity of implementation and comparable estimation accuracy under low frequency offset.
出处
《电视技术》
北大核心
2007年第12期8-10,75,共4页
Video Engineering
基金
国家863项目(20060101Z2174)
欧盟第六框架国际合作项目(045461)
关键词
TDS-OFDM系统
PN序列
载波频偏估计
自相关
累加
TDS-OFDM systems
PN sequence
carrier frequency offset estimation
auto-correlation
accumulation
