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1～7MSps范围内连续可调,具有高灵敏度以及可捕获最大达±700kHz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。
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.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第12期85-87,97,共4页
Computer Engineering and Applications
