序号调制技术在未来无线网络中的应用研究

Index modulation (IM), which utilizes the on-off state of some building block of communication systems to convey information, is a highly competitive revolutionary technique for next-generation wireless networks since it is capable of achieving both high spectral efficiency and high energy efficiency. So far, research attentions on IM have been mainly focused on the design of end-to-end modulation/demodulation schemes under perfect conditions. Differently, this project aims to solve several underlying problems arising from massive users networking in the next-generation wireless networks with IM. Specifically, this project will design secure space- or frequency-domain IM schemes to solve the information leakage problem by randomizing the wiretap channel based on the redundant antenna activation patterns or by randomizing the mapping of IM bits based on the legal OFDM channel quality, respectively. Further, attentive to the spectrum scarcity problem, this project will merge the IM and non-orthogonal multiple access techniques by means of power splitting and sparse code set partitioning to improve the efficiency of multiple access, and explore a possible IM broadcasting form by determining the crossing point between the error curves of IM bits and conventional modulation bits to improve the broadcasting efficiency. Finally, attentive to the problem of bad quality of serve (QoS) at the cell edge, this project will use the constellation permutations to convey the channel matching information for improving the relay efficiency, and meanwhile build an accuracy model and analyze the statistics of the cell-edge interference to propose the optimal receiver. The research outputs of this project are hopeful to widen the application prospect of IM techniques.

序号调制利用通信系统基本组成模块的“开关”状态承载比特信息，可同时获得高谱效和高能效，是未来无线网络中具有强竞争力的革命性技术。当前，序号调制技术的研究主要集中在理想条件下的端到端调制与解调方案的设计。本课题针对未来无线网络中海量用户组网带来的信息易泄漏问题，根据天线激活组合的冗余随机化窃听用户的信道和根据子载波信道质量构造随机化的序号比特映射机制以分别建立安全的空域和频域序号调制方案；针对带来的频谱资源稀缺问题，通过功率分割及梳状码集合分割融合序号调制与非正交多址接入技术以提高多址接入效率，同时，通过确定序号调制比特与传统符号调制比特的性能分界点设计序号调制的广播形式以提高广播效率；针对带来的小区边缘服务质量差问题，利用星座图排列携带信道匹配信息以提高中继效率，同时，建立小区边缘干扰模型并统计干扰分布以构建最佳接收机。研究成果有望扩大序号调制技术在未来无线网络中的应用前景。

序号调制利用通信系统基本组成模块的“开关”状态承载比特信息，可同时获得高谱效和高能效，是未来无线网络中具有强竞争力的革命性技术。当前，序号调制技术的研究主要集中在理想条件下的端到端调制与解调方案的设计。本课题针对未来无线网络中海量用户组网带来的信息易泄漏问题，根据天线激活组合的冗余随机化窃听用户的信道和根据子载波信道质量构造随机化的序号比特映射机制以分别建立安全的空域和频域序号调制方案；针对带来的频谱资源稀缺问题，通过功率分割与梳状码集合分割融合序号调制与非正交多址接入技术以提高多址接入效率，同时，通过确定序号调制比特与传统符号调制比特的性能分界点设计序号调制的广播形式以提高广播效率；针对带来的小区边缘服务质量差问题，利用星座图排列携带信道匹配信息以提高中继效率，同时，建立小区边缘干扰模型并统计干扰分布以构建最佳接收机。研究成果有望扩大序号调制技术在未来无线网络中的应用前景。课题共出版1册英文专著，发表60篇期刊论文，授权专利3件，获得了IEEE通信学会亚太地区杰出青年学者奖以及2个国际会议最佳论文奖。