多通道单载波频域均衡高速信息传输技术

Multi-channel High-speed Information Transmission Technology Based on SC-FDE

针对空地宽带通信系统高速传输的要求与多径扩展、多普勒扩展影响之间的矛盾,结合传统单载波频域均衡(SC-FDE)的技术优势,提出了通过优化帧结构,用数字合成方法实现多通道单载波频域均衡(MC-SC-FDE)的解决方案。该方法具有较高的频谱效率和较强的抗多径衰落能力,在多普勒扩展和多径扩展情况下,定时跟踪稳定,可以很好地适应快衰落信道,已在实际的工程上成功应用,有一定的推广价值。

According to the demands of high- speed transmission in air- ground wide band communication system and the conflict between the influence of muhipath spread and Doppler spread, combined with the technological advantages of classical single - carrier frequency domain equalization （ SC - FDE） ,a novel solution of multi- channel SC- FDE（ MC- SC- FDE） realization is proposed by using frame structure optimization and digital combination method. The simulation results indicate that the method has high frequency spectral performance and the ability to oppose multi- path interference. In the condition of multipath spread and Doppler spread, it is stable in timing tracking and applicative in time- domain fast fading channels. The method is applied successfully in projects and can be popularized.