Invention Grant
- 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
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Application No.: US10500548Application Date: 2002-12-09
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Publication No.: US07974331B2Publication Date: 2011-07-05
- Inventor: Luzhou Xu , Dong Wang
- Applicant: Luzhou Xu , Dong 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

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.
Public/Granted literature
- US20050078740A1 Rake receiver with individual finger compensator(s) Public/Granted day:2005-04-14
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