摘要
针对分布式MIMO OFDM系统,提出一种基于分数阶傅里叶变换(FRFT)的定时同步与频偏捕获算法。发送端采用线性调频信号作为训练序列,接收端通过分数阶傅里叶变换,先对各个发送天线之间的相互干扰进行抑制,再完成定时同步与频偏捕获。相比于已有算法,该算法有效地提升了定时同步与频偏捕获的精度。仿真结果表明了其有效性。
For MIMO OFDM systems,a timing synchronization and frequency offset acquisition method based on fractional Fourier transform（ FRFT） is proposed. At the transmitter side,the linear FM signals are used as the training sequences. At the receiver side,the fractional Fourier transform is performed to suppress the interferences among different transmit antennas and the timing synchronization and frequency offset acquisition can be accomplished. Compared with the existing methods,the accuracy of timing synchronization and frequency offset acquisition is improved. The simulation results prove the effectiveness of the proposed method.
出处
《信息技术》
2015年第6期99-102,108,共5页
Information Technology
关键词
多输入多输出
正交频分复用
分数阶傅里叶变换
定时同步
频偏捕获
multiple-input multiple-output
orthogonal frequency division multiplexing
fractional Fourier transform
timing synchronization
frequency offset acquisition
