引入MIMO技术的单载波频域均衡系统

Research on SC-FDE Systems with MIMO Technology Imported

为克服传统的单发单收(SISO)单载波频域均衡(SC-FDE)系统频谱效率低的缺点,给出了一种引入多输入多输出(MIMO)复用技术的SC-FDE系统方案。该方案使用2根发射天线在同一个频率同时发射包含不同信息的2路数据,并使用2根接收天线同时进行接收。设计了高效的帧结构,使得新方案可以延用SISO+SC-FDE系统的方法来获得同步;并利用频域相移正交训练序列获得信道估计。在频域均衡后,再把信号变回时域检测。该方案相较于传统的SISO+SC-FDE系统,频谱效率可提高大约1倍。

The spectral efficiency of the conventional single-input single-output（SISO）single-carrier frequency-domain equalization（SC-FDE）system has lower spectral efficiency.In order to overcome this disadvantage,a novel SC-FDE system scheme with multiple-input multiple-output（MIMO）multiplexing technology imported is proposed.In this scheme,two transmitting antennas are used to transmit two data streams containing different information in one carrier at the same time,and two receiving antennas are also used to receive the signals simultaneously.By designing effective frame structure,the new scheme can get synchronization by utilizing the same method as the SISO＋SC-FDE system,channel estimate can also be realized by using frequency-domain phase-shift orthogonal sequences.After equalized in frequency-domain,the signals are transformed into time-domain to be detected.The spectral efficiency of the proposed scheme is almost twice over that of the conventional SISO＋SC-FDE system.