基于联合二元映射机制的无线网络信道安全编码算法

发布时间：2018-05-05 23:23

本文选题：G无线网络 + 信道编码　；参考：《计算机工程与设计》2017年07期

【摘要】：当前5G网络信道安全编码算法因未能综合考虑对物理层编码及网络层传输流编码性能,使其信源传输码率与传输质量较低,为此提出一种基于联合二元映射机制的无线网络信道安全编码算法。构建层次树状分割机制(hierarchical tree segmentation,HTS),对信源编码进行充分估计,结合带宽重排序方式降低传榆报文的冗余现象;采用RTCP/OFGB机制将传输信源分割成按时序排列的N个传输子流,将最小传输子流误码率作为信道编码码率的判别指标,实现误码率与信道编码码率的最优传输匹配;设计联合二元映射机制,根据传输过程中的信道矩阵具有的线性无关特性,将该矩阵的特征向量进行特征信道拆分(feature channel resolution,FCR),将得到的特征矢量进行再排序,形成最佳传输的子信道;引入能量分配机制,实现传输子流与传输子信道的优化匹配,提高信道传输效率及质量。仿真结果表明,与当前垂直分层空时编码算法(vertical layered space-time coding algorithm,VBLAST)以及联合信源信道编码算法(joint source and channel coding algorithm,JSCC)相比,所提算法具有更高的信源传输码率与传输质量。
[Abstract]:Due to the failure of the current 5G channel security coding algorithm to consider the performance of physical layer coding and network layer transport stream coding, the source transmission rate and transmission quality are low. In this paper, a channel security coding algorithm based on joint binary mapping mechanism is proposed. The hierarchical tree segmentation mechanism is constructed to estimate the source coding sufficiently, to reduce the redundancy of the transmission packets by combining the bandwidth reordering method, and to use the RTCP/OFGB mechanism to divide the transmission sources into N transmission sub-streams arranged in sequence. The minimum transmission sub-stream bit error rate is taken as the criterion of channel coding rate, the optimal transmission matching between the bit error rate and the channel coding rate is realized, and the joint binary mapping mechanism is designed according to the linear independence of the channel matrix in the transmission process. The Eigenvectors of the matrix are divided into feature channel resolution channels, the resulting feature vectors are reordered to form the best transmission subchannels, and the energy allocation mechanism is introduced to optimize the matching between the transmission substreams and the transmission subchannels. Improve channel transmission efficiency and quality. Simulation results show that compared with vertical layered space-time coding algorithm VBLAST and joint source and channel coding algorithm, the proposed algorithm has higher source transmission rate and transmission quality.
【作者单位】：宁夏大学计算机网络与信息管理中心;宁夏大学信息工程学院;
【基金】：国家自然科学基金项目(61562069) 宁夏高等学校科学技术研究基金项目(NXGXZR201107) 宁夏自然科学基金项目(61563043)
【分类号】：TN929.5

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