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基于稀疏傅里叶变换的LTE-A多点协作异步干扰抵消方法
引用本文:李汪丽.基于稀疏傅里叶变换的LTE-A多点协作异步干扰抵消方法[J].科学技术与工程,2018,18(8).
作者姓名:李汪丽
作者单位:湖北第二师范学院 计算机学院
基金项目:湖北省自然科学基金青年项目“网络中多媒体数据检索的研究”(B2013013);湖北省自然科学基金青年项目“基于人工免疫系统的异常学习行为预警方法”(2014CFB569)
摘    要:针对LTE-A多点协作复杂性高、规模大,使得在异步干扰抵消时,很难直接将多点协作异步干扰进行消除的问题,提出基于稀疏傅里叶变换的LTE-A多点协作异步干扰抵消方法。通过分析LTE-A异构网络环境及受干扰情况。引入傅里叶变换方法对LTE-A信号进行稀疏化处理,使其达到稀疏性特征条件,按照稀疏表示方式对信号进行描述。针对LTE-A中受多点协作异步干扰的信号,将稀疏系数较大的部分看作有效信号;将稀疏系数较小的部分看作多点协作异步干扰部分。依据受干扰信号在稀疏基上的稀疏特征将有效部分和干扰部分分离,从而实现多点协作异步干扰的抵消。实验结果表明,改进方法能够有效抵消LTE-A多点协作异步干扰,其抵消后功率谱输出及SINR值更加接近无干扰下的功率谱输出及SINR值,保证了网络使用质量,具有一定的实用性。

关 键 词:稀疏系数  多点协作  异步干扰  抵消  傅里叶变换
收稿时间:2017/10/11 0:00:00
修稿时间:2017/10/30 0:00:00

LTE-A multi-point cooperative asynchronous interference cancellation method based on sparse Fourier transform
LI Wang-li.LTE-A multi-point cooperative asynchronous interference cancellation method based on sparse Fourier transform[J].Science Technology and Engineering,2018,18(8).
Authors:LI Wang-li
Institution:Hubei University of Education,school of computing
Abstract:Because of the high complexity and large scale of LTE-A multi point cooperation, it is difficult to eliminate the multi point cooperative asynchronous interference directly when the asynchronous interference is counteracted. A LTE-A multi-point cooperative asynchronous interference cancellation method based on sparse Fourier transform is proposed. Through the analysis of LTE-A heterogeneous network environment and interference situation. Fourier transform method is introduced to sparse the LTE-A signal so that it can achieve sparse feature conditions and describe the signal in sparse representation. According to the signal by coordinated multi-point asynchronous interference in LTE-A, part of the large sparse coefficient as the valid signal, sparse coefficients smaller as part of coordinated multi-point asynchronous interference, based on sparse feature interference in sparse signal based on the separating part and the interference part, so as to realize the coordinated multi-point asynchronous interference cancellation. The experimental results show that the improved method can effectively counteract LTE-A coordinated multi-point asynchronous interference, the power spectrum of the output offset and SINR values closer to the power spectrum of the output without interference and SINR value, and guarantee the network service quality, has a certain practicality..
Keywords:Sparse coefficients  multi-point collaboration  asynchronous interference  offset  Fourier transform
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