全数字正交相移键控解调器设计  

Design of an All-Digital Quadrature Phase Shift Keying Demodulator

作　　者：杨浩[1] 林争辉[1] 蔡雄飞[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《上海交通大学学报》2005年第9期1538-1543,共6页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)资助项目(2002AA1Z1190)

摘　　要：作为数字卫星视频广播(DVB-S)接收芯片的核心组件,给出了一种全数字正交相移键控(QPSK)接收解调器的设计.该解调器由载波频率恢复、载波相位恢复、符号同步3个环路为主要部分构成,具有良好的抗噪声性能、较低的系统差损和适中的算法复杂度.介绍了3个环路的具体设计,并给出了优化的环路参数和仿真结果.最后给出了FPGA实现的结果.As the key component of satellite digital video broadcast receive system and chip, this paper presented the design of an all-digital quadrature phase shift keying （QPSK） demodulator. This demodulator includes three sub-components as carrier frequency recovery loop, carrier phase recovery loop and symbol synchronization loop. This demodulator has a good performance at low SNR, low system loss and reasonable complexity. This paper described the design of the loops in detail, and presented the simulation results at optimum coefficients. The paper also presented the implementation results in FPGA at last.

关 键 词：正交相移键控 全数字解调器 载波恢复 符号同步 数字视频广播 

分 类 号：TN919.6[电子电信—通信与信息系统]