CAJ | 학술논문

针对现代数字通信系统中广泛采用的MPSK调制信号，分析了其相位跳变特征以及码速率估计的本质，将相关运算应用在隐含周期性检测中，提出了一种基于自相关的码速率估计算法，通过Matlab仿真验证了算法性能，并与基于包络谱单谱线检测的码速率估计方法进行了性能对比。该算法突破了传统基于谱的检测算法对数据长度和信噪比的限制，实现了在低信噪比、少符号数条件下MPSK信号的码速率估计。
침대현대수자통신계통중엄범채용적MPSK조제신호，분석료기상위도변특정이급마속솔고계적본질，장상관운산응용재은함주기성검측중，제출료일충기우자상관적마속솔고계산법，통과Matlab방진험증료산법성능，병여기우포락보단보선검측적마속솔고계방법진행료성능대비。해산법돌파료전통기우보적검측산법대수거장도화신조비적한제，실현료재저신조비、소부호수조건하MPSK신호적마속솔고계。
For the MPSK signal widely used in modern digital communication systems,this paper analyzes the characteristics of phase jump and the essence of symbol rate estimation,uses correlation operation in the measurement of connotative periodicity,proposes a method of symbol rate estimation based on autocorrelation, evaluates the performance through simulation on Matlab, compare the capability with the method of symbol rate estimation based on envelope spectrum single spectrum line.This algorithm breaks through the restriction of data length and SNR in traditional algorithm,and implements the symbol rate estimation of MPSK signal in the condition of little data and low SNR.