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    • 6. 发明授权
    • Digital matched filter despreading received signal and mobile wireless terminal using digital matched filter
    • 数字匹配滤波器使用数字匹配滤波器解扩接收信号和移动无线终端
    • US07016400B2
    • 2006-03-21
    • US09745996
    • 2000-12-26
    • Shoji Goto
    • Shoji Goto
    • H04B1/69H04B1/707
    • H03H17/0254
    • A digital matched filter includes a received signal holding unit for holding received signal samples, a spreading code generating unit for generating known spreading codes, and a correlation value calculating unit for calculating a correlation value between the received signal samples and the spreading codes. The received signal holding unit is formed of a plurality of registers arranged in parallel and gate circuits are provided at respective preceding stages for masking signal input unless signal writing is to be performed. The correlation value calculating unit is formed of a plurality of slow-operation calculating circuits arranged in parallel. Each calculating circuit is divided into product-sum calculating units at the anterior and posterior stages respectively. The product-sum calculating unit at the posterior stage is stopped when it is not the time of detecting a peak value in order to reduce power consumption.
    • 数字匹配滤波器包括用于保持接收信号采样的接收信号保持单元,用于产生已知扩展码的扩展码产生单元,以及用于计算接收信号采样和扩展码之间的相关值的相关值计算单元。 接收信号保持单元由并行排列的多个寄存器形成,并且门电路设置在用于屏蔽信号输入的各个前级,除非执行信号写入。 相关值计算单元由并行布置的多个慢动作计算电路构成。 每个计算电路分别在前后阶段分为乘积和计算单元。 为了降低功耗,当不是检测峰值的时间时,后级的乘积和计算单元停止。
    • 7. 发明申请
    • Synchronization acquisition circuit and receiving apparatus using the same
    • 同步采集电路及使用该电路的接收装置
    • US20050220229A1
    • 2005-10-06
    • US11088721
    • 2005-03-25
    • Shoji Goto
    • Shoji Goto
    • H04B1/707H04B1/7077H04B1/7093H04B1/713H04B1/7156H04L7/00H04L7/04H04L27/06
    • H04B1/7156H04B2001/71563H04L7/042
    • A matched filter is provided with a plurality of taps and calculates correlations between a baseband signal and a diagnosis signal series. The matched filter derives the diagnosis signal series, based on the first through fourth preamble patterns that are candidates for a match with a preamble pattern included in the baseband signal. A hopping pattern detection unit averages the correlations output from the matched filter for each symbol. The hopping pattern detection unit generates and analyzes delay profiles so as to detect a frequency hopping pattern. A symbol timing detection unit averages the correlations output from the matched filter over the symbols. The symbol timing detection unit generates and analyzes delay profiles so as to detect symbol timing in steps.
    • 匹配滤波器具有多个抽头并且计算基带信号和诊断信号​​序列之间的相关性。 匹配滤波器基于作为与包括在基带信号中的前导码模式匹配的候选的第一至第四前导码模式,导出诊断信号序列。 跳频图案检测单元对于每个符号对从匹配滤波器输出的相关性进行平均。 跳频图案检测单元生成并分析延迟分布,以便检测跳频图案。 符号定时检测单元对符号上的匹配滤波器输出的相关性进行平均。 符号定时检测单元生成并分析延迟分布,以便逐步检测符号定时。