光通信系统中的区间干扰抵消（英文）

发布时间：2018-08-15 13:56

【摘要】：提出了可见光通信系统中针对小区间干扰(ICI)环境下的的正交和非正交调制传输方案设计.所提出的调制传输方案设计着重改善多小区同时传输非同步光信号而导致的小区间干扰对可见光系统误码率性能及信道传输容量的影响,并给出了正交调制传输方案的性能分析和仿真.用干扰环境下的正交脉冲(OP)信号的双极相移键控(BPSK)调制方案来消除小区间干扰的问题,改善系统误码率性能并提高传输容量.由于每个区间的脉冲信号正交,小区个数的增加使得调制信号带宽增大.设计了非正交脉冲(NOP)方案使得相邻较远的小区可以复用相同的脉冲信号来减小系统带宽需求.比较了正交脉冲、复用正交脉冲和非正交脉冲3种不同的调制传输方案对小区间干扰问题的改善效果,同时也给出了3种调制传输方案的误码率和信道容量的理论解和仿真结果.结果表明:正交脉冲传输方案在小区干扰环境下传输效率更高,并且系统性能明显优于非正交脉冲调制方案.
[Abstract]:The design of orthogonal and non-orthogonal modulation transmission schemes for inter-cell interference (ICI) environments in visible light communication systems is presented. The proposed modulation and transmission scheme focuses on improving the influence of inter-cell interference caused by multi-cell simultaneous transmission of asynchronous optical signals on the BER performance and channel transmission capacity of the visible light system. The performance analysis and simulation of the quadrature modulation transmission scheme are also given. The bipolar phase-shift keying (BPSK) modulation scheme of orthogonal pulse (OP) signals in jamming environment is used to eliminate the problem of inter-cell interference, to improve the BER performance and to increase the transmission capacity. Because the pulse signal of each interval is orthogonal and the number of cells increases, the bandwidth of modulation signal increases. A non-orthogonal pulse (NOP) scheme is designed to reduce the bandwidth requirement of the system by multiplexing the same pulse signals to adjacent and distant cells. Three different modulation and transmission schemes, orthogonal pulse, multiplexed quadrature pulse and non-orthogonal pulse, are compared to improve the inter-cell interference problem. At the same time, the theoretical solution and simulation results of BER and channel capacity of three modulation transmission schemes are given. The results show that the orthogonal pulse transmission scheme is more efficient than the non-orthogonal pulse modulation scheme in the cell interference environment and the system performance is obviously superior to that of the non-orthogonal pulse modulation scheme.
【作者单位】：东南大学移动通信国家重点实验室;中兴通讯股份有限公司;
【基金】：The National High Technology Research and Development Program of China(863 Program)(No.2013AA013601) the National Natural Science Foundation of China(No.61223001) the Natural Science Foundation of Jiangsu Province(No.BK20140646) the Research Fund of National Mobile Communication Research Laboratory(No.2014A03;2014B03;2014B04) the Research Fund of Zhongxing Telecommunication Equipment Corporation the Fundamental Research Funds of the Central Universities(No.2242014K40033) the United Creative Foundation of Jiangsu Province(No.BY2013095-1-18)
【分类号】：TN929.1

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