HFC网中的离散小波多音调制技术研究

Study of DWMT Modulation Techniques for HFC Networks

摘要: 针对HFC网上行信道窄带噪声的环境,研究了HFC网中的离散小波多音调制技术,并对离散小波多音调制技术和离散多音调制技术进行了比较。计算机仿真结果表明,离散小波多音调制子信道幅频响应特性远优于离散多音调制。离散小波多音调制通过精心设计子信道使其具有极佳的幅频响应特性曲线,具有比离散多音调制更强的抑制信道间干扰的能力。

Abstract: In this paper, discrete wavelet multi-tone modulation techniques for Hybrid Fiber/Coax up-stream are studied. The DWMT modulation techniques with discrete multi-tone are compared. It is proved that DWMT is better than DMT through computer simulation expriments.DWMT has a better spectral performance by carefuly desiging of subchannel and thus has a stronger anti-ICI ability than DMT.