Invention Grant
US07974331B2 Rake receiver with individual finger compensator(s) 有权
带独立手指补偿器的耙式接收器

  • Patent Title: Rake receiver with individual finger compensator(s)
  • Patent Title (中): 带独立手指补偿器的耙式接收器
  • Application No.: US10500548
    Application Date: 2002-12-09
  • Publication No.: US07974331B2
    Publication Date: 2011-07-05
  • Inventor: Luzhou XuDong Wang
  • Applicant: Luzhou XuDong Wang
  • Applicant Address: CH Geneva
  • Assignee: ST-Ericsson SA
  • Current Assignee: ST-Ericsson SA
  • Current Assignee Address: CH Geneva
  • Priority: EP02075027 20020107
  • International Application: PCT/IB02/05352 WO 20021209
  • International Announcement: WO03/058839 WO 20030717
  • Main IPC: H04B1/707
  • IPC: H04B1/707
Rake receiver with individual finger compensator(s)
Abstract:
Rake receivers in code division multiple access (CDMA) telecommunication comprise fingers (1,2,3) with each finger processing signal components for a particular transmission path to be able to better synchronize with a RF signal received via different paths, and a combiner (4) for combining the results originating from said fingers, and a compensator in the form of a controlled oscillator in a feedback loop. By locating a finger compensator (20-25) in a finger, said finger can handle complex situations, like Doppler shifts under high-speed conditions. Preferably, most or all fingers each comprise such a finger compensator, in which case said feedback loop can be avoided. Such a finger compensator can be hardware, software or a mixture of both when comprising a filter (21) plus an amplitude normalizer (22) between two arithmetical modules (20,25) for multiplying an input symbol signal with a conjugated previous input symbol signal and an output symbol signal with a previous output symbol signal.
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