多路高清图像选择性传输慢衰落信道压缩感知技术  

Multi channel high-definition image selective transmission with slow fading channel compression sensing technology

作　　者：陈镜伊 CHEN Jingyi(Unit 150 of the Force 92941,Huludao 125000,China)

机构地区：[1]92941部队第150所,辽宁葫芦岛125000

出　　处：《电子设计工程》2025年第7期177-180,185,共5页Electronic Design Engineering

摘　　要：针对慢衰落信道稀疏特性引起多路高清图像信号传输载波间干扰,导致均方误差大、误码率高的问题,提出了慢衰落信道压缩感知技术。构建多路高清图像信号传输结构示意图,对发送、接收信号角域进行正交变换处理。计算多径信道频率冲激响应,获取最大多普勒频移,保证信道功率非零系数集中在低频段,改善慢衰落信道的稀疏性。利用信号的稀疏性,重构一维离散信号正交基底下的稀疏信号,计算该信号与空间中任意一组信号集合的内积,构建压缩感知的连续可微函数。引入误差容许项,构建压缩感知目标函数,实现慢衰落信道压缩感知。由实验结果可知,该技术在信噪比为30 dB时,均方误差达到最小为0.2。在信噪比为25 dB时,误码率达到最小为1%,满足了慢衰落稀疏信道的传输需求。A slow fading channel compression sensing technology is proposed to address the issue of carrier to carrier interference in the transmission of multi channel high-definition image signals caused by the sparse characteristics of slow fading channels,resulting in large mean square error and high bit error rate.Construct a schematic diagram of the transmission structure for multi channel high-definition image signals,and perform orthogonal transformation processing on the angle domain of the transmitting and receiving signals.Calculate the frequency impulse response of multipath channels,obtain the maximum Doppler frequency shift,ensure that the channel power non-zero coefficients are concentrated in the low frequency range,and improve the sparsity of slow fading channels.Using the sparsity of the signal,reconstruct the sparse signal under the orthogonal basis of a one-dimensional discrete signal,calculate the inner product of the signal with any set of signals in space,and construct a continuous differentiable function for compressive sensing.Introducing an error tolerance term and constructing a compressed sensing objective function to achieve compressed sensing in slow fading channels.According to the experimental results,the mean square error of this technology reaches a minimum of 0.2 with no error at a signal-to-noise ratio of 30 dB.When the signal-to-noise ratio is 25 dB,the error rate reaches a minimum of 1%,which meets the transmission requirements of slow fading sparse channels.

关 键 词：多路高清图像 选择性传输 慢衰落信道 压缩感知 稀疏信号 

分 类 号：TN911.23[电子电信—通信与信息系统]