基于自适应压缩感知的信道估计算法.pdfVIP

估怠侍输~接入拉术 基于自适应压缩感知的信道估计算法 陈仿杰 (四创电子股份有限公司，安徽合肥23(088) 摘 要: 传统方法压缩感知算法截取训练、序列最后未被数据干扰固定部分作为观测矩碎，该方法为了抵抗最差的 信道而浪费了大量的可用观测数据。 在此基础上提出了一种自适应压缩感知的信道估计算法，首先对训练序列进行 自适应捻测，得到整个未受干扰的观测矩碎，再用压缩感知算法计算信道估计。 仿真结果表明，这种基于自适应压缩 感知的信道估计算法大幅提高了信道估计的准确性。 关键词:自适应;压缩感知;传送估计;观测矩阵。 中图分类号: TP39 1.4 文献标识码:A 文章编号: 1 ∞3-31 14(201 4 )03 - 39-3 Channel Estimatioo ßased 00 Adaptive Compressive Sensiog CH EN Fang-jie (Anhui Province Sun-Create Electronics Co. , Ltd , Hefei Anhui 23∞邸， China) Abstract: A lot of compressive sensing methods are applied in channel estimation for beuer performance.The accuracy of compres- sive sensing method is closely related to the observation matrÏx .The traditional method takes the fixed final part of the training sequence not interfered by the former valid data as observation matrix .ln order to resist the worst channel , the traditional method 叨11 waste a lot of available observationωquence in practical scenarios.An adaptive compressive sensing-based channel estimation is proposed in this 阴阳: the entire un-interfered training sequence is detected dynamically to obtain the whole un-interfered observation matrixωd the compressive sensing method is used to calculate the channel estimation. The simulation results show that the proposed method can effectively improve the accuracy of channel estimation. K ey words :adaptive; compressive sensing ; channel estimation;observation matrix 缩感知算法利用动态获取的整个观测矩阵进行信道 0 引言 的重建。 在实际信道环境中，自适应压缩感知算法 在无线传输系统中，为了进行高速可靠传输，必 大大提高了信道估计的准确性。 须利用信道信息进行均衡处理，消除多径信道带来