Acquisition and tracking filter for spread spectrum signals
    1.
    发明公开
    Acquisition and tracking filter for spread spectrum signals 失效
    Erfassungs- und VerfolgungsfilterfürSpreizspektrumsignale

    公开(公告)号:EP0757450A3

    公开(公告)日:2000-06-21

    申请号:EP96112313.0

    申请日:1996-07-30

    IPC分类号: H04B1/707

    摘要: The present invention has an object to provide a filter circuit largely reducing electric power to consume compared with a conventional one, as well as realizing the first acquisition in enough high speed. In a filter circuit according to the present invention, a matched filter and a sliding correlator are used in parallel, the first acquisition and holding is executed by a matched filter, a correlating operation is executed by a sliding correlator and a voltage is stopped to supply to the matched filter.

    摘要翻译: 本发明的目的是提供一种与传统电路相比大大降低电力消耗的滤波器电路,以及以足够高的速度实现第一次采集。 在根据本发明的滤波器电路中,并行使用匹配滤波器和滑动相关器,第一采集和保持由匹配滤波器执行,相关操作由滑动相关器执行,并且停止电压以供应 到匹配的过滤器。

    Matched filter circuit
    2.
    发明授权
    Matched filter circuit 失效
    Signalangepasste Filterschaltung

    公开(公告)号:EP0756378B1

    公开(公告)日:2001-10-24

    申请号:EP96112146.4

    申请日:1996-07-26

    IPC分类号: H03H11/04 H03H17/02

    CPC分类号: H03H11/04 H03H17/0254

    摘要: The present invention has an object to provide a matched filter with further reduced electric power. In a matched filter circuit according to the present invention, the electric power supply is stopped with respect to an unnecessary circuit according to an experience that signal is partially sampled just after the acquisition. Since the spreading code is 1 bit data string, the input signal sampled and held is branched out into the signal groups"1" and "-1" by a multiplexer. The signals in each groups are added in parallel by a capacitive coupling, and the electric power is supplied in the circuit intermittently.

    Weighted addition circuit
    4.
    发明公开
    Weighted addition circuit 失效
    Gewichtete Addierschaltung

    公开(公告)号:EP0756239A1

    公开(公告)日:1997-01-29

    申请号:EP96111793.4

    申请日:1996-07-22

    IPC分类号: G06G7/14 H03M1/80 G06J1/00

    CPC分类号: G06J1/00 G06G7/14

    摘要: The present invention provides a weighted addition circuit for realizing the function of sampling and holding and weighted addition by a smaller circuit than a conventional one. In the weighted addition circuit according to the present invention, a capacitive coupling is connected to a plurality of switches connected only to an input voltage, and a voltage is held and a weight is added in the capacitive coupling.

    摘要翻译: 本发明提供了一种加权加法电路,用于通过比常规电路更小的电路来实现采样和保持加权相加的功能。 在根据本发明的加权加法电路中,电容耦合连接到仅连接到输入电压的多个开关,并且保持电压并且在电容耦合中增加权重。

    Matched filter circuit
    7.
    发明公开
    Matched filter circuit 失效
    匹配滤波器电路

    公开(公告)号:EP0756378A1

    公开(公告)日:1997-01-29

    申请号:EP96112146.4

    申请日:1996-07-26

    IPC分类号: H03H11/04 H03H17/02

    CPC分类号: H03H11/04 H03H17/0254

    摘要: The present invention has an object to provide a matched filter with further reduced electric power. In a matched filter circuit according to the present invention, the electric power supply is stopped with respect to an unnecessary circuit according to an experience that signal is partially sampled just after the acquisition. Since the spreading code is 1 bit data string, the input signal sampled and held is branched out into the signal groups"1" and "-1" by a multiplexer. The signals in each groups are added in parallel by a capacitive coupling, and the electric power is supplied in the circuit intermittently.

    摘要翻译: 本发明的目的在于提供一种功率进一步降低的匹配滤波器。 在根据本发明的匹配滤波器电路中,根据在采集之后信号被部分采样的经验,电力供应相对于不必要的电路停止。 由于扩展码是1位数据串,所以采样和保持的输入信号被多路复用器分支到信号组“1”和“-1”。 每组中的信号通过电容耦合并联添加,并且间歇地在电路中供应电力。

    Matched filter circuit
    8.
    发明公开
    Matched filter circuit 失效
    匹配滤波器电路

    公开(公告)号:EP0756377A1

    公开(公告)日:1997-01-29

    申请号:EP96111795.9

    申请日:1996-07-22

    IPC分类号: H03H11/04 H03H17/02

    摘要: An object of the present invention is to provide a matched filter circuit of small size and consuming low electric power. Paying attention that a spreading code is a 1 bit data string, an input signal is sampled and held as an analog signal along the time sequence, classified into "1" and "- 1" and the classified signals are added in parallel by capacitive coupling in a matched filter circuit according to the present invention.

    摘要翻译: 本发明的一个目的是提供一种小尺寸和消耗低功率的匹配滤波器电路。 注意扩展码是1位数据串,输入信号被采样并作为沿时间序列的模拟信号被保持,被分类为“1”和“ - 1”,并且通过电容耦合将分类的信号并行地相加 在根据本发明的匹配滤波器电路中。

    Direct sequence code division multiple access cellular system
    9.
    发明公开
    Direct sequence code division multiple access cellular system 审中-公开
    蜂窝系统采用直接序列kodemultiplexvielfachzugriff

    公开(公告)号:EP0930723A3

    公开(公告)日:2003-07-30

    申请号:EP99100692.5

    申请日:1999-01-14

    申请人: Yozan Inc.

    IPC分类号: H04B1/707

    摘要: A (direct-sequence code division multiple access) DS-CDMA cellular system includes a plurality of cells each having one base station and a plurality of mobile stations. A signal transmitted form the base station is distinguished by a long code which is different from the others being uniquely allocated to each cell. A long code synchronization timing being detected by a correlation using a common short code. The long codes are searched in each mobile station by a partial correlation in a timing according to the long code synchronization timing. The partial correlation is a correlation between a signal received and a segment of a code defined by a part of the long code, the part being shifted in the long code. Further, the long codes are classified into a plurality of long code groups defined by long code group identification codes. A delay profile of the long code group identification code is detected and is compensated in fading according to said short code. Then, the long code group identification code is combined by rake combining, and is demodulated.