摘要
研究了循环平稳信号的基本特性,通过分析通信系统中典型信号的循环平稳特性,得到了循环平稳的特征参数循环频率和信号特征参数的关系。在此基础上研究了该理论在通信领域的具体应用,提出了应用谱相关理论完成弱信号检测及信号特征参数(信号载频、码元速率)的估计方案,仿真实验结果表明,在-17dB的条件下能够进行信号的无误检测,可在-10dB条件下进行特征参数的无误估计。
The basic properties of cyclostationary signal are studied.The relationship of the characteristic parameter and the cyclic frequency is achieved by analyzing the signal in communication system.The scheme for weak signal detection and characteristic parameter estimation is proposed for the communication application.The simulation results show that the signal could be correctly detected at the SNR-17 dB,and the characteristic parameter of signal estimated at SNR -10 dB.
出处
《通信技术》
2010年第4期28-30,共3页
Communications Technology
关键词
循环自相关函数
循环谱密度
弱信号检测
参数估计
cyclic autocorrelation function
cyclic spectral density function
weak signal detection
parameter estimation
