Invention Application
US20030128747A1 Multiplexed CDMA and GPS searching 失效
多路复用CDMA和GPS搜索

  • Patent Title: Multiplexed CDMA and GPS searching
  • Patent Title (中): 多路复用CDMA和GPS搜索
  • Application No.: US10041205
    Application Date: 2002-01-07
  • Publication No.: US20030128747A1
    Publication Date: 2003-07-10
  • Inventor: Wang Paul PoonQiuzhen Zou
  • Main IPC: H04B001/707
  • IPC: H04B001/707
Multiplexed CDMA and GPS searching
Abstract:
Searcher hardware is multiplexed to perform simultaneous searches in either an IS-95 CDMA mode or a GPS mode. In the IS-95 mode, the search hardware is time-multiplexed into a number of searcher time slices, each of which can generate a PN sequence to despread a data sequence. In the GPS mode, the search hardware is configured as a number of distinct GPS channels, each of which can generate a Gold code sequence for tracking a GPS signal from a particular GPS satellite. This configuration allows the searcher to perform multiple GPS signal searches simultaneously. Signal searching in both IS-95 and GPS modes is performed at significantly higher speeds compared to conventional searcher hardware. Moreover, the search hardware can be dynamically configured to operate in either the IS-95 or the GPS mode, eliminating the need for dedicated circuitry for each mode of operation.
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