高码速率QPSK解调载波恢复的原理与仿真  

Theory of a High-Speed QPSK Demodulation and Its System View Simulation

作　　者：许婷婷[1] 李勇[1] 王洪菊[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《信息安全与通信保密》2007年第5期68-70,共3页Information Security and Communications Privacy

摘　　要：QPSK调制解调是高码速率数传系统的关键技术,载波恢复环和位定时技术的性能直接影响解调的性能。论文重点研究了一种改进型COSTAS环和并行处理技术,并在高码速率下通过System View进行系统仿真,仿真结果表明,载波恢复方法具有较好的误码率性能及抗噪声性能高等优点。QPSK modem is the key technology in transmission system with high-speed code rate. The performance of carrier recovery and time synchronization directly determines the result of the demodulation. In this paper, the improved- COSTAS loop and parallel receiver technology are analyzed and simulated in System View. The result indicates that the method discussed in this paper has many advantages, such as low BER and strong anti-interference.

关 键 词：QPSK解调 SYSTEM VIEW 载波恢复 

分 类 号：TN763[电子电信—电路与系统]