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在现代通信传输系统中,频带拥挤的问题日益突出,数字信号传输信道的带限和非线性两大特性对发送信号的频谱也提出了较高要求,因此成形滤波器发挥着越来越重要作用。阐述了成形滤波的基本原理,采用基于多相结构的查表法设计方案,运用各类建模与仿真软件对该方案进行了开发、仿真和验证,解决了实际高速处理数据的硬件限制问题。
In the modern communication transmission system, the problem of frequency band crowding becomes more and more prominent. The two characteristics of band limit and non-linearity of the digital signal transmission channel also place higher requirements on the spectrum of the transmitted signal. Therefore, shaping filters play an increasingly important role . The basic principle of forming filter is expounded. The design scheme of look-up table based on multi-phase structure is adopted. The program is developed, simulated and verified by various modeling and simulation softwares to solve the hardware limitation problem of actual high-speed data processing.