数据采集与处理2018，Vol.33Issue(2)：215-222,8.DOI:10.16337/j.1004-9037.2018.02.003
一种物理层网络编码系统的符号时钟估计算法
Algorithm for Symbol Timing Estimation in Physical-Layer Network Coding System
摘要
Abstract
Recently,physical-layer network coding (PNC),a novel digital communication system,has aroused extensive interest of researchers.Similar to most other digital communication systems,the symbol timing plays an indispensable role in PNC.The existing research results,however,usually assume the symbol timing is fully known and rarely discuss the problem of symbol synchronization for PNC.In this paper,in view of the present situation,according to the maximum-likelihood estimation criterion we propose a new algorithm with a low oversampling factor (samples per symbol) based on the orthogonal training sequences.The proposed algorithm has the double advantage of a low sampling rate and high precision.It is shown by simulations that with a same oversampling factor,the proposed algorithm offers up to a 10-fold increase in the mean square error (MSE) performance over the conventional optimum sample (OS) algorithm for signal-noise ratio (SNR) of 5 dB.关键词
物理层网络编码/双向中继信道/符号时钟估计/脉冲形状/过采样率Key words
physical-layer network coding/two-way relay channels/symbol timing estimation/pulse shape/oversampling factor分类
信息技术与安全科学引用本文复制引用
党小宇,李强,顾晓宇,虞湘宾..一种物理层网络编码系统的符号时钟估计算法[J].数据采集与处理,2018,33(2):215-222,8.基金项目
国家自然科学基金(61571224,61571225)资助项目 （61571224,61571225）
江苏六大高峰人才资助项目. （）
