摘要
MIMO-OFDM技术将是下一代无线通信中的关键技术。分布式MIMO-OFDM系统因其大容量,低功耗,更好的覆盖等优势而得到广泛应用,但现在对MIMO-OFDM系统同步问题的研究大多在集中式MIMO-OFDM系统下。本文提出了一种基于训练序列的分布式系统的定时和频率同步方法,通过对训练序列进行一些相关运算,能够估计出多个时间偏移和单个的频率偏移。仿真结果表明,新提出的方法在定时同步的正确率和频率同步的均方误差方面表现出了很好的性能。
The MIMO - OFDM will be the key technology in the next generation of wireless communication. The distributed MIMO - OFDM system is widely used because of its large capacity, low power consumption, better cover and so on advantage. But now the synchronous research is mostly for centralized MIMO -OFDM system. This paper proposes the time and frequency synchronization methods of the distributed system based on the training sequences. The more time delay and one frequency offset can be estimated through some related calculation betwen the training sequences. The simulation results indicate that the new method show a good performance in the accuracy of timing synchronization and the minimum mean square error in the frequency synchronization.
出处
《无线通信技术》
2013年第1期6-9,共4页
Wireless Communication Technology
