BFSK信號循環(huán)平穩(wěn)特性分析
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摘 要:該文給出二進制頻移鍵控(BFSK)信號數(shù)學模型,推導BFSK信號的循環(huán)自相關函數(shù)和循環(huán)譜密度函數(shù)的數(shù)學表達式,分析并證明其具有循環(huán)平穩(wěn)特性;最后給出Matlab仿真實驗。仿真結果表明,BFSK信號具有循環(huán)平穩(wěn)特性,屬于循環(huán)平穩(wěn)信號。
關鍵詞:BFSK信號;循環(huán)譜;循環(huán)平穩(wěn)信號;循環(huán)自相關函數(shù);數(shù)值仿真
中圖分類號:TQ018 文獻標志碼:A 文章編號:2095-2945(2023)24-0082-04
Abstract: In this paper, the mathematical model of binary frequency shift keying (BFSK) signal is given, the mathematical expressions of cyclic autocorrelation function and cyclic spectral density function of BFSK signal are derived, and the cyclic stationary characteristics are analyzed and proved. Finally, the Matlab simulation experiment is given. The simulation results show that BFSK signal has the characteristics of cyclic stationary and belongs to cyclic stationary signal.
Keywords: BFSK signal; cyclic spectrum; cyclostationary signal; cyclic autocorrelation function; numerical simulation
在通信、遙測、雷達和聲吶系統(tǒng)中,一些人工信號是一類特殊的非平穩(wěn)信號,它們的非平穩(wěn)特性表現(xiàn)為周期平穩(wěn)[1]。(剩余2255字)