彩色AC-PDP运动图像仿真系统的开发

开发了彩色AC-PDP运动图像仿真系统,通过利用本系统的运动图像仿真功能可以对现有的各种显示技术、与子场有关的各种因素进行仿真及比较,为人们开发提高彩色AC-PDP图像显示质量的新型技术及子场提供了理论上的依据;通过利用本系统的Gamma特性研究功能可以对彩色AC-PDP中视频信号的反Gamma特性进行研究,并对反Gamma相关编码进行子场逼近,为选择符合要求的子场编码提供了判据.     

基于偏振度椭球的PMD补偿方法的研究

分析了PMD椭球的三个轴随PMD的变化规律,建立了以偏振度椭球的短轴作为PMD补偿的反馈信号的PMD补偿系统模型,并通过数值模拟对一阶和二阶PMD进行了补偿,结果表明采用这种方法能同时有效地补偿一阶及二阶PMD。     

延迟锁定环路的大步进快速捕获

本文提出一种新的延迟锁定环路的大步进快速捕获方法，主要解决目前尚未很好解决的低信噪比长序列伪随机码的快速捕获问题。文中讨论了在步进快速捕捕获延迟锁定环路的原理与实现，分析了这种环路的平均捕获时间，解扩相关器的输出成分及大步进搜索时的虚警与检测概率。     

Spectral analysis of some independences on multiple-valued logical functions on their variables

There are many kinds of special relationships between multiple-valued logical functions and their variables, and they are difficult to be judged from their expressions. In this paper, some sufficient and necessary conditions of the independence and statistical independence of multiple-valued logical functions on their variables are given. Some conditions of algebraic independence of multiple-valued logical functions on some of their variables and the way to degenerate a function to the greatest extent are proposed, and some applications of these results are indicated. All the results are studied by using Chrestenson spectral techniques.     

SPECTRAL ANALYSIS OF SOME INDEPENDENCES OF MULTIPLE-VALUED LOGICAL FUNCTIONS ON THEIR VARIABLES

There are many kinds of special relationships between multiple-valued logical func-tions and their variables, and they are difficult to be judged from their expressions. In thispaper, some sufficient and necessary conditions of the independence and statistical independenceof multiple-valued logical functions on their variables are given. Some conditions of algebraicindependence of multiple-valued logical functions on some of their variables and the way to de-generate a function to the greatest extent are proposed, and some applications of these resultsare indicated. All the results are studied by using Chrestenson spectral techniques.     

一种高效地实现运动估计算法的VLSI结构

本文提出了一种全新的低延滞、高吞吐率、可编程的ＶＬＳＩ树型结构，它能十分有效地实现ＦＳＡ和ＴＳＳＡ运动估计算法。该结构比其它树型结构少１／３的处理单元（ＰＥ），而且ＰＥ单元的延时减少一半。独特的ＭＥ窗缓冲结构使Ｉ／Ｏ带宽和Ｉ／Ｏ管脚大大减小，交叉流水线技术使硬件利用率可达到１００％。这些特点使得该结构适合ＶＬＳＩ实现。     

格状编码和RS码级连技术在HDTV中应用的性能模拟

设计一种用于ＨＤＴＶ地面数字传输系统的级连格状编码和ＲＳ码方案，并对其在ＨＤＴＶ中应用进行计算机模拟。模拟结果表明：该级连格状编码方案在低信噪比具有较好的误码性能。     

纠误码在光纤通信系统中的应用

介绍一种纠误码光纤通信系统原理框图,讨论了交错延迟十单位正反码自动纠误编码体制,指出这种纠误码光纤通信系统不但允许信息短期中断,而且可延长通信系统中继距离。作者已研制出低速交错延迟自动纠误设备,其编码与5B6B码型相比,可使系统可靠性显著提高,并减少字同步建立时间。     

分布式残余频偏信道中STBC-OFDM的发射功率优化

在分布式残余频偏信道中,考虑多径瑞利衰落,针对采用判决反馈检测的两发射天线STBC-OFDM链路,提出了一种发射功率优化方法:根据平均信道功率增益、残余频偏方差以及噪声方差的大小,以最小化平均误比特率下界为目标,设置两分布发射天线的发射功率,仿真结果表明:相比于传统的各天线满功率发射方法,所提方法能够在节省发射功率的同...     

一种改进的TPC混合译码算法

为简化Turbo乘积码(Turbo Product Code,TPC)译码处理过程,缩短接收机译码时延,针对航天测控领域应用广泛的子码为扩展汉明码的TPC码,提出一种改进的混合译码算法.改进算法以传统混合译码算法为基础,把SISO和HIHO两种译码器相结合,优化软输入输出(Soft In Soft Out,SISO)中...