一种高性能QAM解调器的设计与实现

计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (12): 85-87.

一种高性能QAM解调器的设计与实现

李庆,吴川,邓运松,曾晓洋

复旦大学专用集成电路与系统国家重点实验室，上海 201203

收稿日期:2007-08-22 修回日期:2007-11-26 出版日期:2008-04-21 发布日期:2008-04-21
通讯作者: 李庆

Design and implementation of high-performance DVB-C demodulator

LI Qing,WU Chuan,DENG Yun-song,ZENG Xiao-yang

State-Key Lab of ASIC and System，Fudan University，Shanghai 201203，China

Received:2007-08-22 Revised:2007-11-26 Online:2008-04-21 Published:2008-04-21
Contact: LI Qing

摘要/Abstract

摘要： 提出了一种适用于DVB-C标准的高性能QAM解调器。通过采用改进的解调算法并优化其VLSI实现结构，该设计在现场测试中不仅取得良好的性能并且节约了硬件资源。该解调器支持4/16/32/64/128/256QAM六种调制模式，符号率1～7 MSps范围内连续可调，具有高灵敏度以及可捕获最大达±700 kHz的载波频偏。实现结果表明该文设计的解调器非常适合于低成本的有线电缆系统。

关键词: QAM解调器, VLSI实现, 载波恢复, 自适应均衡

Abstract: A high-performance DVB-C Quadrature Amplitude Modulation（QAM） demodulator has been presented.By adopting optimal demodulation algorithm and optimizing VLSI implementation architecture，this demodulator achieves high performance at low hardware costs.It supports 4/16/32/64/128/256QAM constellations with symbol rate ranging from 1 MSps to 7 MSps.The demodulator features large carrier offset acquisition range（±700 kHz） and high sensitivity.Experimental results demonstrate the robustness of the proposed demodulator.

Key words: QAM demodulator, VLSI implementation, carrier recovery, adaptive equalization

李庆,吴川,邓运松,曾晓洋. 一种高性能QAM解调器的设计与实现[J]. 计算机工程与应用, 2008, 44(12): 85-87.

LI Qing,WU Chuan,DENG Yun-song,ZENG Xiao-yang. Design and implementation of high-performance DVB-C demodulator[J]. Computer Engineering and Applications, 2008, 44(12): 85-87.

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