离散小波多音调制技术研究  

Study on the Discrete Wavelet Multitone Modulation Techniques

作　　者：金荣[1] 孟相如[1] 陈涛[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《空军工程大学学报（自然科学版）》2003年第1期38-42,共5页Journal of Air Force Engineering University(Natural Science Edition)

摘　　要：离散多音调制(DMT)信号的频谱旁瓣功率过大,在噪声环境和信道特性变化的情况下会影响系统的传输性能。离散小波多音调制(DWMT)采用离散小波变换来代替DMT中的离散傅立叶变换,通过仔细地设计调制信号的频谱特性来提高系统的传输性能。文中在介绍DWMT技术基本原理的基础上,对DWMT系统的关键技术(比特与能量分配算法、基带滤波器设计等)进行了分析研究。通过对DWMT与DMT进行性能上的比较,说明DWMT性能优于DMT,有望用于宽带接入网技术。The overgreat power of side lobe of frequecy spectrum of DMT signal will decline the transmission performance of system in the case of noise environment and channel variationsThe discrete wavelet(DWMT)is adopted to substitute the discrete Fourier transform in DMTThe transmission performance of the system is improved by carefully designing the spectral characteristic of modulation signalThis paper introduces the basic principle of DWMT and analyzes the key techniques of DWMT(bit loading algorithm,baseband filter design,etc)This paper demonstrates that DWMT is superior to DMT in performance by making a comparison in performancee between them and that DWMT Technique has potentialites in broadband access network

关 键 词：离散小波多音调制 离散小波变换 多载波调制 宽带接入网 比特与能量分配算法 基带滤波器 

分 类 号：TN761[电子电信—电路与系统] TN915.6