Invention Grant
- Patent Title: Joint de-spreading and frequency correction using a correlator
- Patent Title (中): 使用相关器进行联合解扩和频率校正
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Application No.: US11678422Application Date: 2007-02-23
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Publication No.: US07889782B2Publication Date: 2011-02-15
- Inventor: Robert Mark Gorday , Jorge Ivonnet
- Applicant: Robert Mark Gorday , Jorge Ivonnet
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: H04B1/00
- IPC: H04B1/00

Abstract:
A correlator (140) for de-spreading a spread-spectrum signal includes a state machine (205), a frequency correction look-up table (207), a pseudorandom code generator (209), and a correlator structure (301 and 801). The spread-spectrum signal includes symbols, and each symbol includes a plurality of chips. The correlator structure includes a plurality of taps (309 and 809) at which a coordinate rotation digital computer (CORDIC) operation is performed to determine an offset from a nominal carrier frequency of the spread-spectrum signal and to change a phase of each chip of a received symbol, in order to correct a carrier frequency of the spread-spectrum signal while de-spreading the spread-spectrum signal.
Public/Granted literature
- US20080205492A1 JOINT DE-SPREADING AND FREQUENCY CORRECTION USING A CORRELATOR Public/Granted day:2008-08-28
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