直扩信号载波频率检测方法性能分析  

Performance Analysis of Carrier Frequency Detection for DS/SS Signals

作　　者：唐璟宇 程剑[1] 

机构地区：[1]中国人民解放军理工大学,江苏南京210000

出　　处：《通信技术》2017年第5期903-907,共5页Communications Technology

摘　　要：通过对平方法、平方-相关累积法、高阶累积量法和循环谱法四种常用的直扩信号载波频率检测方法进行分析研究,确定了影响其在高斯背景噪声下检测性能的主要因素,仿真给出了检测带宽对检测性能的影响和不同条件下采样时长和检测所需最低信噪比的关系曲线。在仿真曲线的基础上,定量分析直扩信号的抗截获能力,大致推导出了检测不同格式直扩信号所需的信噪比门限,对隐蔽通信中直扩信号的设计具有一定的参考价值。Four commonly-used DS/SS carrier frequency detecting methods including square method, square-correlation accumulation method, high-order cumulated method and cyclic spectrum method are analyzed and studied, thus to determine the main factors affecting the detection performance in Gaussian background noise. The simulation indicates the effect of detection bandwidth on detection performance and the relationship curve of between the sampling time and the minimum SNR（signal-to-noise ratio）. On the basis of simulation curve, the anti-intercept ability of DSSS can be quantitatively analyzed and the signal- to-noise ratio threshold for the detection of DSSS signals with different formats is roughly derived. And this is of certain reference value for DS/SS design in concealed communication.

关 键 词：直扩信号 频率检测 抗截获 信号设计 

分 类 号：TN914.42[电子电信—通信与信息系统]