滤波器组多载波通信系统中自适应原型滤波器理论与设计研究

Filter bank multicarrier (FBMC) is beneficial in improving the utilization efficiency of frequency, decreasing the communication latency, and supporting asynchronous transmission, therefore, is one of the significant potential physical layer modulation techniques in future mobile communication systems. The prototype filter design is the most important research problem since it not only affects the out-of-band radiation of signals, and also determines the reconstruction performance of received signals at the receiver. This project mainly investigates the theory and design of adaptive prototype filter in FBMC systems, and proposes a series of new ideas, which mainly consist of: First, establish the prototype filter optimization theory that can adjust filter parameters according to the channel variation to improve the signal reconstruction performance of the communication system and can decrease the equalizer’s complexity at the receiver, then, extend the filter optimization theory to the high velocity mobile scenario. Further, design the adaptive prototype filter optimization method that can adjust the frequency response of signals according to requirements of the frequency usage and interference tolerance of users. Finally, propose the optimal eliminating data symbols and adaptive prototype filter design method that can simultaneously maintain the good frequency localization of signals and effectively reduce the time domain tail of signals. The research objective of this project is to improve the communication performance of FBMC in the typical scenarios of future wireless communication systems, and evolve the development of the FBMC technique.

滤波器组多载波（FBMC）对频谱利用率的提升、异步传输的支持和通信时延的降低提供了有力的支持，是极具潜力的未来移动通信物理层调制技术之一。原型滤波器设计不仅直接影响到信号带外泄漏的高低，还决定了接收机的信号重建性能，是FBMC系统中最为首要的研究问题。本项目主要研究FBMC通信系统中自适应原型滤波器的理论与设计，提出了一系列创新点：首先，建立能够根据信道变化自适应调整参数以提升通信系统信号重建性能并降低接收端均衡器复杂度的原型滤波器优化理论，并拓展到高速移动场景；进一步，设计能够基于频谱使用情况和用户业务干扰容忍度的需求调整信号频谱的自适应原型滤波器优化方法；最后，提出在维持信号良好频域聚焦性基础上能够有效降低信号时域拖尾的最优抵消数据符号和自适应原型滤波器联合设计方案。本项目研究目标是提升FBMC在未来无线通信系统典型场景中的通信性能，从而推进FBMC技术的发展。

滤波器组多载波（FBMC）对频谱利用率的提升、异步传输的支持和通信时延的降低提供了有力的支持，是极具潜力的未来移动通信物理层调制技术之一。原型滤波器设计不仅直接影响到信号带外泄漏的高低，还决定了接收机的信号重建性能，是FBMC系统中最为首要的研究问题。本项目主要研究FBMC通信系统中自适应原型滤波器的理论与设计。首先，建立了信道自适应的高信号重建性能原型滤波器优化理论；其次，设计了基于用户需求的低开销原型滤波器优化方法；最后，提出了数据符号统计特性和原型滤波器联合优化方案。本项目研究提升了FBMC通信系统的频谱效率、抗时频偏、信号重建等性能，推进了FBMC技术的发展。