基于霍夫变换的QPSK信号盲处理结果可信性评估  

Reliability Test for Blind Processing Results of QPSK Signals Using Hough Transformation

作　　者：鲍安平[1,2] 胡国兵 金明[2] BAO Anping1,2. ,HU Guobing3, JIN Ming2(1. School of Automation, Southeast University, Nanjing 210096, China ; 2. Nanjing College of Information and Technology, Nanjing 210023, China; 3.School of Electronic and Information Engir~ering ,Jinling Institute of Technology ,Nanjing 211169, Chin)

机构地区：[1]东南大学自动化学院,南京210096 [2]南京信息职业技术学院电子信息工程学院,南京210023 [3]金陵科技学院电子信息工程学院,南京211169

出　　处：《电子器件》2017年第6期1483-1489,共7页Chinese Journal of Electron Devices

基　　金：江苏省高校"青蓝工程"科技创新团队(2016年)项目(229150203/007);江苏省第十二批六大人才高峰项目(DX022)

摘　　要：为了有效评估QPSK信号盲处理结果可信与否,提出了一种基于霍夫(Hough)变换的评估算法。该方法在缺乏信号先验知识的条件下,根据调制识别结果及相应参数估计结果构造辅助信号,将辅助信号与观测信号作相关累加。以相关累加模值曲线特征为依据,将QPSK信号处理结果的可信性评估问题转化为对Hough变换极值点聚类数是否为1的检验。计算机仿真结果表明,当信噪比大于等于-2 d B时,算法的平均校验正确率大于93%。In order to assess the reliability of the QPSK signal processing results,an algorithm based on Hough transform is proposed.In the absence of a priori knowledge of the signal,by constructing an auxiliary signal based on the modulation and the corresponding parameter estimation results,the correlation sum between the original observed signal and the auxiliary signal is obtained.Based on the characteristics of the correlation modulus curve,the reliability test of blind signal processing is transformed to a test of whether the cluster number of the peaks of the Hough transformation is 1.The computer simulation results show that the average correct verification rate of the proposed algorithm is greater than 93% when the SNR is greater than-2 dB.

关 键 词：盲信号处理 可信性检验 HOUGH变换 QPSK信号 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]