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为了降低多输入多输出正交频分复用(MIMO-OFDM)无线通信系统的符号间干扰并改善系统对频率偏移和定时的敏感,提出一种联合载波频偏估计算法.采用灵活分割相关及最小均方误差准则改进传统载波频率估计算法,实现了基于MIMO-OFDM无线通信系统的精确频偏估计.分析和仿真结果表明,本算法能在信道状况较差情况下实现均方误差估计性能10-6以下,适用于MIMO-OFDM无线通信系统.
In order to reduce the intersymbol interference in MIMO-OFDM wireless communication systems and improve the sensitivity of the system to frequency offset and timing, a joint carrier frequency offset estimation algorithm is proposed, which adopts flexible partition correlation And minimum mean square error criterion to improve the traditional carrier frequency estimation algorithm and realize the accurate frequency offset estimation based on MIMO-OFDM wireless communication system.The analysis and simulation results show that the proposed algorithm can achieve the mean square error estimation performance under poor channel conditions 10-6 The following applies to MIMO-OFDM wireless communication system.