Interference Management And Multiple Access Design Based On Virtual Signal Processing

With the rapid development of mobile internet and Internet of things(Io T),the demand for mobile communication business continues to grow rapidly.On the one hand,with the widespread application of heterogeneous networks and Ultra-Dense Network(UDN)in wireless communication systems,interference has become one of the key factors that restrict the performance of wireless communication networks.Therefore,under the condition of limited resources,the effective interference management mechanism is of great significance.On the other hand,the application scenarios such as ultra high reliability,low delay communication and massive uplink connections have put forward higher requirements for multiple access technology.In this context,this paper designs and studies the interference management and multiple access in wireless communication system.The main work is as follows:Firstly,we design a method of managing homologous multiple interference in Z interference channel.Based on the interaction of signals and a virtual combination of interference,Inside-Out Precoding(IOP)is proposed.We also present two realizations——forward IOP(F-IOP)and backward IOP(B-IOP)——and propose a protocol to realize the synchronization of processing parameters at the interfering Tx(transmitter)and its intended Rx(receiver)so that the Rx can adapt itself to the precoding strategy employed at the Tx side.Our in-depth analysis and simulation results have shown that the proposed IOP can effectively manage multiple interferences from the same source while guaranteering the performance of transmission from the interfering Tx to its intended Rx.Next,the paper designs multiple access for uplink communication system.On the basis of proposing that a signal can be decomposed into several virtual signal components that satisfy the power conservation,Virtual Signal Division Multiple Access(VS-DMA)is proposed.The proposed VS-DMA introduces the extraction signal and extracts the target data through the extraction signal acting on the mixed signals transmitted by the users.The research shows that the proposed method enables the receiver to recover the target data without interference,and achieve multiple access.Finally,the paper summarizes the research work,and gives the possible future research direction.