摘要
为了解决OFDM系统中载波频偏导致载波间干扰从而引起系统性能下降的问题,分析了OFDM信号的特点,采用滑动窗检测的方法,给出了一种基于时域过采样的载波频偏估计算法.理论分析和仿真结果表明,与采用循环前缀的载波频偏估计算法相比,该算法估计精度高,抗噪声和抗多径衰落性能有明显改善.
The carrier frequency offset in OFDM system can lead to the deterioration of system performance. According to the characteristics of OFDM signals, a carrier frequency offset estimation algorithm based on time oversampling is proposed. The algorithm uses a slip window. Theoretical analysis and simulation results show that, compared with the carrier frequency offset algorithm based on cyclic prefix, the accuracy of the proposed algorithm is higher, and the performances of resistance to noise and multipath -degradation are much improved.
出处
《应用科技》
CAS
2007年第8期18-21,共4页
Applied Science and Technology
