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    • 4. 发明授权
    • Initial synchronization method and receiver for DS-CDMA inter base
station asynchronous cellular system
    • 用于DS-CDMA基站间异步蜂窝系统的初始同步方法和接收机
    • US6038250A
    • 2000-03-14
    • US3509
    • 1998-01-06
    • Guoliang ShouChangming ZhouXuping Zhou
    • Guoliang ShouChangming ZhouXuping Zhou
    • H04B1/707H04B1/7075H04B7/26H04W56/00H04W76/02H04B7/216
    • H04B1/7077H04B1/7083H04B1/70735H04B1/70751H04B2201/70702
    • Cells are searched at a high speed using an initial synchronization method and a receiver for a DS-CDMA inter base station asynchronous cellular system. A base band received signal is input to a matched filter and is correlated with a spread code supplied from a spread code generator. A signal electric power calculator calculates the electric power of the correlation output of the matched filter, and outputs the result to a long code synchronization timing determiner, a threshold value calculator, and a long code identifier. During the initial cell search, the spread code generator outputs a short code #0 that is common to the control channel of each of the base stations. After the long code synchronization timing has been determined, each of the segments of the N chips which constitutes a portion of the synthesized spread code sequence synthesized from a long code #i that is unique to each of the base stations and the short code #0 is sequentially replaced and output.
    • 使用初始同步方法和用于DS-CDMA基站间异步蜂窝系统的接收机以高速搜索小区。 基带接收信号被输入到匹配滤波器,并与从扩展码发生器提供的扩展码相关。 信号电力计算器计算匹配滤波器的相关输出的功率,并将结果输出到长码同步定时确定器,阈值计算器和长码标识符。 在初始小区搜索期间,扩频码发生器输出每个基站的控制信道共同的短码#0。 在确定了长代码同步定时之后,构成从每个基站唯一的长码#i合成的合成扩展码序列的一部分的N个码片的每个片段和短码#0 顺序更换并输出。
    • 7. 发明授权
    • Matched filter
    • 匹配过滤器
    • US5887024A
    • 1999-03-23
    • US780145
    • 1996-12-26
    • Xiaoling QinKunihiko SuzukiGuoliang ShouChangming ZhouJie Chen
    • Xiaoling QinKunihiko SuzukiGuoliang ShouChangming ZhouJie Chen
    • H03H11/04H03H17/02H04B15/00H04K1/00H04L27/30
    • H03H11/04H03H17/02
    • The present invention provides a matched filter which can refresh an entire while keeping the speed of a calculation comparable to a small sized circuit. The first and second addition circuits of a matched filter of the present invention are classified into a plurality of groups, the first and second auxiliary adders replace functions for the groups of the first and second adders respectively. The outputs of the first and second adders are then inputted to the first and second subtractors, respectively, and the refreshing means appropriately refreshes the groups replaced by the first and second auxiliary adders. Further, the present invention decreases the number of auxiliary sapling and holding circuits to be used, and decides the refreshing intervals by considering the change of the voltage caused by leakage and other permissible errors of output voltage.
    • 本发明提供了一种匹配滤波器,其可以保持与小尺寸电路相当的计算速度的整体刷新。 本发明的匹配滤波器的第一和第二加法电路分为多个组,第一和第二辅助加法器分别代替第一和第二加法器的组的功能。 然后,第一和第二加法器的输出分别输入到第一和第二减法器,并且刷新装置适当地刷新由第一和第二辅助加法器替换的组。 此外,本发明减少了要使用的辅助树苗和保持电路的数量,并且通过考虑由漏电引起的电压的变化和输出电压的其他允许误差来决定刷新间隔。
    • 10. 发明授权
    • Interface circuit having a plurality of thresholding circuits
    • 接口电路具有多个阈值电路
    • US5661482A
    • 1997-08-26
    • US536243
    • 1995-09-29
    • Guoliang ShouKazunori MotohashiMakoto YamamotoSunao Takatori
    • Guoliang ShouKazunori MotohashiMakoto YamamotoSunao Takatori
    • H03M1/34G06J1/00H03M1/74H03K19/0175H03K19/00
    • G06J1/00
    • An interface circuit comprising a digital to analog converter which comprises a register for receiving and holding each bit of a digital signal, a capacitive coupling for integrating total bits held in the register with weighting, an inverted amplifier circuit for receiving an output of the capacitive coupling and for outputting an analog output voltage, and a feedback capacitance for connecting an outputs of the inverted amplifier circuit to an input of the inverted amplifier circuit, an analog signal line to which the analog output voltage is connected, and an analog to digital converter which comprises a plurality thresholding circuits with stepwise thresholds to which the analog signal line is commonly inputted, each the thresholding circuit receiving outputs of the thresholding circuits of higher threshold with weighting so that the thresholding circuits repeatedly change the outputs from high level to low level or from low level to high level.
    • 一种接口电路,包括数模转换器,其包括用于接收和保持数字信号的每一位的寄存器,用于将保持在寄存器中的总比特积分为加权的电容耦合,反相放大器电路,用于接收电容耦合的输出 并且用于输出模拟输出电压,以及用于将反相放大器电路的输出连接到反相放大器电路的输入的反馈电容,连接有模拟输出电压的模拟信号线以及模数转换器, 包括具有逐步阈值的多个阈值电路,模拟信号线被共同地输入到该阈值电路中,每个阈值电路通过加权接收具有较高阈值的阈值电路的输出,使得阈值电路将输出从高电平重复地改变为低电平或从 低级到高级。