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    • 21. 发明专利
    • Slope, drift, and offset compensation method for receiver without intermediate frequency
    • 没有中频的接收机的斜率,偏移和偏移补偿方法
    • JP2005137014A
    • 2005-05-26
    • JP2004320731
    • 2004-11-04
    • Ericsson Incエリクソン インコーポレイテッドEricsson Inc.
    • LINDQUIST BJOERNDENT PAUL W
    • H03M3/02H03D3/00H03D7/16H03M13/39H04B1/26H04B1/30H04L25/03H04L27/14H04L27/22H04L27/233
    • H03D7/165H03D3/008H04L25/03273H04L27/233H04L2025/03401H04L2025/03407
    • PROBLEM TO BE SOLVED: To show clearly an offset and a slope of additivity in a modulated signal.
      SOLUTION: At first, an offset and a first estimation of slope are performed, and then, an assumption of all possible values of one or more continuous information symbols is performed. To each of the assumption, the offset and the estimation of slope are performed using a series of related data symbols, and the result is stored instead of each assumption. A estimation result is used in an expected value computation of the signal to each of assumption, and moreover, discrepancy between a sample of the signal and the expected value of a modulated signal is calculated. Then, each of the assumption is extended at one symbol by one symbol, the estimation result is updated, and furthermore, the discrepancy is accumulated, a transmission path measured value to each of the extended assumption is formed, a viterbi sequential type maximum likelihood sequence estimation processing based on this is used, and the assumption of the maximum likelihood of modulation information symbols which is not substantially spoiled by the additivity slope and the offset is formed.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:清楚地显示调制信号中的相加偏移和斜率。 解决方案:首先,执行斜率的偏移和第一估计,然后执行一个或多个连续信息符号的所有可能值的假设。 对于每个假设,使用一系列相关数据符号来执行斜率的偏移和估计,并且存储结果而不是每个假设。 将估计结果用于对每个假设的信号的期望值计算,此外,计算信号的采样和调制信号的期望值之间的差异。 然后,将每个假设以一个符号扩展一个符号,更新估计结果,此外,累积差异,形成每个扩展假设的传输路径测量值,维特比序列型最大似然序列 使用基于此的估计处理,并且形成基本上不被加性斜率和偏移损坏的调制信息符号的最大似然度的假设。 版权所有(C)2005,JPO&NCIPI