CAJ | 학술논문

在循环平稳理论的基础上，对DVB-S2信号的循环谱特征进行了理论分析和推导，针对计算中出现的平滑噪声包络起伏明显影响估计性能的问题进行了分析，提出了改进措施，并利用Chirp-z变换替代FFT变换，达到了降低运算量、提高分辨率的目的。仿真结果表明改进后的方法能够在低信噪比条件下有效估计出DVB-S2信号的符号速率。
재순배평은이론적기출상，대DVB-S2신호적순배보특정진행료이론분석화추도，침대계산중출현적평활조성포락기복명현영향고계성능적문제진행료분석，제출료개진조시，병이용Chirp-z변환체대FFT변환，체도료강저운산량、제고분변솔적목적。방진결과표명개진후적방법능구재저신조비조건하유효고계출DVB-S2신호적부호속솔。
This paper studies the cyclic spectrum characteristics of DVB-S2 signals based on the cyclic stationary theory. The problem of the elevatory envelope of the smooth noise which is analyzed and proposed method is given. With the help of Chirp-z transform is uesd to improve the performance. Simulation result shows that it can prove the symbol rate effectively.