正弦型非线性调频键控信号循环谱分析

Analysis of Sine Non-Linear Chirp Keying Signal Cycle Spectrum

本文在正弦非线性切普键控(Sine Non-linear Chirp Keying,SNCK)通信系统的理论下,对SNCK已调信号的谱特征进行了深入的研究。介绍循环谱原理,根据循环谱定义推导SNCK已调信号的循环谱数学公式,推出SNCK已调信号的载波频率和码元速率在循环谱截面的特征。使用Matlab进行仿真,得到SNCK已调信号循环谱三维图及其截面,可以据此得到载波频率和码元速率,并用硬件仿真SNCK已调信号循环谱截面,得到软硬件联调一致性。

In this paper, the theory of nonlinear sine Chepstow keying（Sine Non-linear Chirp Keying, SNCK） communication system for SNCK modulated signal spectral features is in-depth studied. It introduces the principle of cyclic spectrum deduces cyclic spectrum sections characterized SNCK modulated signal cyclic spectrum of mathematical formulas, the introduction SNCK modulated carrier frequency signal and a symbol rate based on cyclic spectral definition. Using Matlab simulation, it gives SNCK modulated signal cyclic spectrum three-dimensional map and cross-section, obtains carrier frequency and symbol rate, and hardware emulation SNCK modulated signal cyclic spectrum sectional, obtains hardware FBI consistency.