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    • 5. 发明授权
    • Unique word recognition system
    • 独特的词识别系统
    • US5774462A
    • 1998-06-30
    • US907777
    • 1997-08-11
    • Hiroyasu IshikawaHideo Kobayashi
    • Hiroyasu IshikawaHideo Kobayashi
    • G06F7/02H04B7/15H04J3/06H04L7/04H04L7/08H04Q7/38
    • H04J3/0608G06F7/02H04L7/042G06F2207/025
    • In a time division multiplex (TDM) signal in which a symbol is sent one by one periodically, a unique word in the TDM signal is recognized quickly in a receiving station. A receive station has essentially N number of correlators each having a specific unique word pattern. A unique word pattern in each correlator is obtained by shifting by predetermined symbols cyclically from a reference unique word pattern. Each correlator provides a correlation value between a received TDM signal which includes a unique word and a unique word pattern defined in the correlator. Among outputs of N number of correlation values, which exceed a predetermined threshold value, the correlator which provides the maximum correlation value is selected, and the receive timing of the unique word is determined by the correlator thus selected.
    • 在周期性地逐个发送符号的时分复用(TDM)信号中,TDM信号中的唯一字在接收站中被快速识别。 接收站具有基本上N个相关器,每个具有特定唯一的字模式。 通过从参考唯一字模式循环移位预定符号,可获得每个相关器中的唯一字模式。 每个相关器在包括唯一字的接收TDM信号和在相关器中定义的唯一字模式之间提供相关值。 在N个相关值的超过预定阈值的输出中,选择提供最大相关值的相关器,并且由所选择的相关器确定唯一字的接收定时。
    • 6. 发明授权
    • Selection diversity system using decision feedback equalizer in digital
mobile telecommunication systems
    • 在数字移动电信系统中使用决策反馈均衡器的选择分集系统
    • US5455844A
    • 1995-10-03
    • US181197
    • 1994-01-13
    • Hiroyasu IshikawaHideo Kobayashi
    • Hiroyasu IshikawaHideo Kobayashi
    • H04B7/005H04B7/08H03H7/30H03D1/00H03D1/04
    • H04B7/082H04B7/005
    • A selection diversity system using a decision feedback equalizer which has excellent tracking ability performance and equalization ability performance for frequency selective fading and a diversity effect against Rayleight fading. In a selection diversity system using a decision feedback equalizer, a decision data symbol of the equalizer output of a branch in which an average estimation error over a plurality of symbols is minimum is selected and combined, and the selected decision data symbol is used to recalculate the estimation error of every decision feedback equalizer and the tap gain coefficient of the decision feedback equalizer is updated using the recalculated estimation error, thereby overcoming the step out by the integration of the estimation error and the random selection error which is caused by the selective combined diversity system.
    • 一种使用判决反馈均衡器的选择分集系统,其对于频率选择性衰落具有优异的跟踪能力性能和均衡能力性能以及对瑞利衰落的分集效应。 在使用判决反馈均衡器的选择分集系统中,选择并组合多个符号中的平均估计误差最小的分支的均衡器输出的判定数据符号,并且使用所选择的判定数据符号重新计算 使用重新计算的估计误差来更新每个判决反馈均衡器的估计误差和判定反馈均衡器的抽头增益系数,从而克服由选择性组合引起的估计误差和随机选择误差的积分 多样性系统。