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    ITERATIVE CDMA PHASE AND FREQUENCY ACQUISITION
    11.
    发明公开
    ITERATIVE CDMA PHASE AND FREQUENCY ACQUISITION 审中-公开
    迭代CDMA相位和频率检测

    公开(公告)号：EP1506623A1

    公开(公告)日：2005-02-16

    申请号：EP03715283.2

    申请日：2003-04-30

    申请人： Koninklijke Philips Electronics N.V.

    发明人： YUE, Lin

    IPC分类号： H04B1/707

    CPC分类号： H04B1/70758

    摘要： A system and method is provided that searches for the frequency and phase of a CDMA transmission in an iterative manner. With its automatic frequency control (AFC) disabled, the receiving system performs a coarse search for the transmitter's CDMA phase at a nominal receiving frequency. When the coarse phase is obtained, the AFC is invoked with a large-range pull-in, to obtain an initial, coarse frequency that is likely to be closer to the transmitter's frequency than the initial nominal frequency. At this coarse frequency, the receiving system repeats its search for the transmitter's CDMA phase, starting at the previously determined coarse phase. Because this second phase determination is conducted in the presence of less frequency error, it provides for a more accurate phase determination. The AFC is again invoked, but with a small-range pull-in, to obtain a finer frequency determination. Because the finer frequency determination is conducted in the presence of less phase error, a substantial improvement in the accuracy and precision of the frequency determination can be achieved. To achieve this more accurate phase and frequency determination within the same time duration as a conventional acquisition process, the initial coarse phase determination is conducted using a rapid, albeit less accurate, process than the conventional phase determination.

    CDMA receiver with low current consumption
    13.
    发明公开
    CDMA receiver with low current consumption 有权
    具有低电流消耗的CDMA接收器

    公开(公告)号：EP0984559A3

    公开(公告)日：2004-02-25

    申请号：EP99250303.7

    申请日：1999-09-01

    申请人： NEC CORPORATION

    发明人： Tsumura, Soichi

    IPC分类号： H04B1/16 ,  H04B1/707

    CPC分类号： H04W52/0274 ,  H04B1/70758 ,  H04B2201/70709 ,  Y02D70/122 ,  Y02D70/24 ,  Y02D70/26 ,  Y02D70/40

    摘要： In a CDMA receiver (16) for intermittently receiving a spread spectrum received signal using a despreading code and comprising a high-resolution time reference generating section (34) and a low-resolution time reference generating section (32), a state control section (30, 36, 38, 40) puts, for substantially a reception operation stop time interval (Ts) , the CDMA receiver into a cold standby state where the high-resolution time reference generating section (34) does not operate while the low-resolution time reference generating section (32) operates. On or immediately before a reception return time instant (t 0 + kT L + nT H ), the state control section puts the CDMA receiver into a hot standby state where the high-resolution time reference generating section (34) operates.

    摘要翻译： 在利用解扩码间歇地接收扩频接收信号并包括高分辨率时间基准产生部分（34）和低分辨率时间基准产生部分（32）的CDMA接收机（16）中，状态控制部分（ 30,36,38,40）基本上在接收操作停止时间间隔（Ts）中将CDMA接收机置于冷等待状态，其中高分辨率时间基准产生部分（34）不工作而低分辨率 时间基准产生部分（32）工作。 在接收返回时刻（t0 + kTL + nTH）之前或之前，状态控制部分使CDMA接收机进入高分辨率时间基准产生部分（34）工作的热备用状态。

    METHOD OF CELL INITIAL SEARCH IN CDMA DIGITAL MOBILE TELECOMMUNICATION SYSTEM
    14.
    发明公开
    METHOD OF CELL INITIAL SEARCH IN CDMA DIGITAL MOBILE TELECOMMUNICATION SYSTEM 有权
    方法在数字移动通信系统CDMA小区开始搜索

    公开(公告)号：EP1330136A1

    公开(公告)日：2003-07-23

    申请号：EP01900378.9

    申请日：2001-01-12

    申请人： China Academy of Telecommunications Technology

    发明人： LI, Feng ,  XU, Tiezhu ,  HE, Yusong ,  RAN, Xiaolong

    IPC分类号： H04Q7/36

    CPC分类号： H04W52/32 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/7083 ,  H04W52/50 ,  H04W56/00

    摘要： The invention relates to a cell initial search method for user equipment (UE) in a CDMA digital cellular mobile communication system. The method includes: a UE after selecting a working frequency point, obtains downlink synchronization with the base station; and corrects carrier deviation between the UE and the base station. The downlink synchronization includes: deciding a range of downlink training sequence timeslot (DwPTS) based on training sequence power characteristic window value method; solving correlation of received data and training sequence in the range to obtain accurate receiving position of a UE. The correction of carrier deviation between a UE and the base station includes: estimating carrier deviation between a UE and the base station by software, recovering carrier frequency difference by using decision and feedback method to adjust hardware and carrier deviation correction method based on joint detection to correct carrier deviation.

    SEARCH METHOD IN CDMA MOBILE COMMUNICATION RECEIVING SYSTEM AND RECEIVING DEVICE
    16.
    发明公开
    SEARCH METHOD IN CDMA MOBILE COMMUNICATION RECEIVING SYSTEM AND RECEIVING DEVICE 有权
    在NINRICHTENEMPFÄNGER的EINEM MOBILEN CDMA NACHRICHTENEMPFANGSYSTEM中的SUCHVERFAHEN

    公开(公告)号：EP1220482A1

    公开(公告)日：2002-07-03

    申请号：EP00961054.4

    申请日：2000-09-18

    申请人： NEC Corporation

    发明人： HAYATA, Toshihiro, c/o NEC Corporation

    IPC分类号： H04J13/04

    CPC分类号： H04B1/70758 ,  H04B1/70754 ,  H04B1/7083 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/7117

    摘要： Two kinds of user-tailored searchers, narrow-search-range searchers (3, 4) and a wide-search-range searcher (5), are set out of a plurality of groups of searchers in compliance with the features of two kinds of multi-paths in mobile communication, and are used, thereby making it possible to search efficiently with high accuracy and on reduced hardware and software scales.

    摘要翻译： 两种用户量身定制的搜索器，窄搜索范围搜索器（3,4）和广泛搜索范围搜索器（5）被设置在多组搜索者中，符合两种 移动通信中的多路径，并且被使用，从而使得可以以高精度和减少的硬件和软件规模有效地搜索。