利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

29 条记录 (耗时 0.026 秒)

    Method and a device for maintaining the performance quality of a code-division multiple access system in the presence of narrow band interference
    9.
    发明授权
    Method and a device for maintaining the performance quality of a code-division multiple access system in the presence of narrow band interference 有权
    用于在存在窄带干扰的情况下维持码分多址系统的性能质量的方法和装置

    公开(公告)号：US06807405B1

    公开(公告)日：2004-10-19

    申请号：US09301477

    申请日：1999-04-28

    申请人： Charles E. Jagger ,  Mark N. Willetts ,  Micolino Tobia

    发明人： Charles E. Jagger ,  Mark N. Willetts ,  Micolino Tobia

    IPC分类号： H04B110

    CPC分类号： H04W72/082 ,  H04B1/10 ,  H04B1/1036 ,  H04B1/71 ,  H04B1/7103 ,  H04B7/005 ,  H04B15/00 ,  H04B2001/1063 ,  H04B2201/709709 ,  H04B2201/709718 ,  H04W24/00 ,  H04W24/02 ,  H04W24/04 ,  H04W24/08 ,  H04W24/10 ,  H04W28/04 ,  H04W28/16 ,  H04W28/20 ,  H04W52/243 ,  H04W52/245 ,  H04W72/0453 ,  H04W72/085 ,  H04W88/02 ,  H04W88/08

    摘要： A method and device which dynamically detects, tracks and filters interfering signals with sufficient speed (i.e. within one IS-95 CDMA data. frame period, or 20 ms) and fidelity to eliminate or greatly reduce the deleterious effects of narrow band interferer signals on a CDMA link. When inserted in an RF signal path an Adaptive Notch Filter (ANF) detects narrow band interferors above a threshold level within the CDMA signal. Detection is accomplished by continuous scanning of a preset excision band, e.g. a specified narrow band associated with an AMPS system. Detected interferors are then automatically acquired and suppressed. This is achieved by electronically placing a rejection notch at the frequency of the interferors. Multiple notch filters may be used to simultaneously suppress multiple interferors. In the absence of interferors a bypass mode is selected allowing the RF signal to bypass the notch. Upon detection of an interferer, a switch is made to a suppression mode where the interferor is steered through a first notch section and suppressed. Alternatively, an external control line may be used to select the bypass mode so that the signal is allowed to pass the notch section, regardless of interferer content.

    摘要翻译： 一种以足够的速度动态地检测，跟踪和滤波干扰信号的方法和装置（即，在一个IS-95 CDMA数据帧周期内，或者20ms，并且保真度以消除或大大降低CDMA链路上窄带干扰信号的有害影响。 自适应陷波滤波器（ANF）在RF信号路径中插入时，检测CDMA信号内的阈值以上的窄带干扰，通过连续扫描预设的切除频带，例如与AMPS系统相关的特定窄带来实现。 检测到的干扰器然后被自动获取和抑制，这是通过电子地在干扰器的频率上放置一个抑制陷波来实现的，多个陷波滤波器可以用于同时抑制多个干扰器，在不存在干扰的情况下，选择旁路模式，允许RF 信号绕过缺口，一旦检测到干扰器，就将开关变成抑制模式，其中int 磨损器通过第一切口部分转向并被抑制。 或者，可以使用外部控制线来选择旁路模式，使得允许信号通过缺口部分，而不管干扰源的内容。