降低成对差错概率的预编码方法  

Precoding Method for Reduce the Probability of Paired Errors

作　　者：丁晓贵 胡浪涛 DING Xiaogui;HU Langtao(School of Computer and Information,Anqing Normal University,Anqing 246133,China)

机构地区：[1]安庆师范大学计算机与信息学院,安徽安庆246133

出　　处：《安庆师范大学学报（自然科学版）》2021年第3期54-57,66,共5页Journal of Anqing Normal University(Natural Science Edition)

基　　金：安徽高校自然科学研究重点项目(KJ2019A0554)。

摘　　要：预编码技术是利用信道状态信息对串/并联转换后信号进行编码的一种方法,其目的是提高系统容量和消除干扰。根据切比雪夫定理,构建一个满秩范德蒙预编码矩阵,通过求解欧式几何距离对误差的期望值,使得该矩阵不依赖调制方式。降低差错概率的预编码方法具有以下优势:(1)获得最大的分集增益且不依赖调制方式;(2)达到最小化成对误差概率,不改变现有系统结构;(3)编码的复杂度较低。预编码方法仿真实验结果表明:构建的预编码矩阵在满足约束条件下,成对差错概率达到最小,系统误码率降低,编码增益提高,这种预编码技术明显优于其他方法。Precoding technology is a method using channel state information to encode the signal after series/parallel conversion, and it can improve system capacity and eliminate interference. A full rank Vandermonde precoding matrix is constructed according to Chebyshev theorem. The matrix is independent of modulation mode by solving the expected error value of Euclidean geometric distance. The advantages of this matrix are as follows:(1) obtaining the maximum diversity gain without depending on modulation;(2) minimizing the pairwise error probability without changing the existing system structure;(3) low coding complexity. Through the simulation of three precoding methods. It is proved that the precoding matrix constructed can minimize the pairwise error probability, reduce the system bit error rate and improve the coding gain under the constraint conditions. This precoding technology is obviously superior to other methods.

关 键 词：多小区 差错概率 预编码 分集技术 

分 类 号：TN915.01[电子电信—通信与信息系统]