太赫兹科学与电子信息学报2016，Vol.14Issue(3)：350-354,5.DOI:10.11805/TKYDA201603.0350
一种新的同频小区检测方法
A new cell detection algorithm under co-channel interference environments
摘要
Abstract
To improve the spectral efficiency, 3rd Generation Partnership Project(3GPP) Long Term Evolution(LTE) usually adopts frequency reuse-1 system,which leads to co-channel interference among neighbor cells. Co-channel interference increases the difficulty of cell detection, especially when two neighbor cells use the same Primary Synchronization Signal(PSS). In such cases, since it is difficult to obtain the channel frequency response(CFR) for the Secondary Synchronization Signal(SSS) by directly using the PSS,the detection rate for the cell with weak signal will significantly degrade. To address the above issue, this paper proposes a cell detection algorithm for the LTE system with co-channel interference. The proposed method first presents a reasonable model for the received signals,and then estimates the CFR of the cell with strong signal by solving the equations. After that,the interference is cancelled and the cell with weak signal is detected. Simulation results show that the proposed algorithm can significantly improve the detection rate of the cell with weak signal. Even when Signal-Noise Ratio(SNR)is 10 dB, the detection rate of the proposed algorithm can achieve 70%. When SNR is 20dB, the detection rate can be above 90%,which significantly outperforms the typical cell detection algorithm whose detection rate is only 50%.关键词
长期演进/同频干扰/小区检测/正交频分复用/辅同步信号Key words
Long Term Evolution/co-channel interference/cell detection/Orthogonal Frequency- Division Multiplexing/Secondary Synchronization Signal分类
信息技术与安全科学引用本文复制引用
方圆驰,胡蝶..一种新的同频小区检测方法[J].太赫兹科学与电子信息学报,2016,14(3):350-354,5.基金项目
国家自然科学基金资助项目(61540026) （61540026）
