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首页> 外文会议>International Conference on Computational Science and Its Applications(ICCSA 2006) pt.2; 20060508-11; Glasgow(GB) >Algorithm and Structure to Cancel Signal Distortion in ATSC Digital TV System
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Algorithm and Structure to Cancel Signal Distortion in ATSC Digital TV System

机译：消除ATSC数字电视系统中信号失真的算法和结构

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In this paper we propose the 8 VSB (8 Vestigial Side Band) method which is decided as the standard of modulators for next generation digital TV System. In developing digital TV System, one of the difficult problems is how digital signal can be transmitted to the receiver without any phase & amplitude distortion. But, phase & amplitude error is liable to occur by imperfect design, circumstance variation and device degradation. These characteristics result in distortion of I, Q signal of modulator and interference in adjacent channels. In particular, the interference in modulator with a high power amplifier results in serious problems in adjacent channels. Here we analyzed problems of phase & amplitude error which are occurred when 8 levels digital signals are modulated to IF signal. And we suggested phase & amplitude error compensation algorithm and discussed the results for adaptation of the algorithm. This paper is directed to a phase and amplitude compensation apparatus and method for a digital modulator. An object of the paper is to maintain the optimum operating state of the modulator, preferably, provided in a digital television repeater.
机译：在本文中，我们提出了8 VSB（8 Vestigial Side Band）方法，该方法被确定为下一代数字电视系统的调制器标准。在开发数字电视系统中，困难的问题之一是如何将数字信号传输到接收机而没有任何相位和幅度失真。但是，由于设计不完善，环境变化和器件性能下降，很容易发生相位和幅度误差。这些特性导致调制器的I，Q信号失真以及相邻信道中的干扰。特别地，在具有高功率放大器的调制器中的干扰导致相邻信道中的严重问题。在这里，我们分析了将8级数字信号调制为IF信号时出现的相位和幅度误差问题。并提出了相位和幅度误差补偿算法，并讨论了该算法的自适应结果。本文针对一种用于数字调制器的相位和幅度补偿装置和方法。本文的目的是保持调制器的最佳操作状态，优选地，调制器设置在数字电视转发器中。

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