摘要
脉冲位置相位翻转键控(3PRK)是一种超窄带(UNB)调制技术。相关文献已证明其已调信号是循环平稳信号,对其频谱也作了分析,但对该调制信号具有的循环平稳特性却没有相关论述。介绍了循环平稳信号的定义,推导了3PRK信号的循环谱数学表达式,提出了利用循环统计量对3PRK信号进行检测的方法,并进行了仿真实验。实验表明,该方法有很强的噪声抑制能力。
Pulse Position Phase Reversal Keying （3PRK） is a kind of UNB modulation method. And it has already been proved that 3PRK signal is of cyclostationary property and its Fourier spectrum has been studied, however, its cyclostationary property hasn＇t been studied. In this paper,the concepts of cyclostationary signal are briefly discussed and the mathematical expression of cyclic spectral density （CSD） of 3PRK signal is deducted. By utilizing cyclic statistics method, this paper also puts forward a test method and gives simulations of 3PRK signal. The experiment shows cyclic statistics has a powerful capability of controlling noise.
出处
《无线电通信技术》
2009年第4期38-40,共3页
Radio Communications Technology
基金
国家自然科学基金资助项目(批准号:60772056)
关键词
3PRK
超窄带
谱分析
循环平稳
3PRK signal
UNB
spectral analysis
cyclostationarity
