Invention Grant
- Patent Title: Tracking system comprised in an OFDM receiver
- Patent Title (中): 包括在OFDM接收机中的跟踪系统
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Application No.: US11086504Application Date: 2005-03-22
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Publication No.: US07480337B2Publication Date: 2009-01-20
- Inventor: Michael Lewis
- Applicant: Michael Lewis
- Applicant Address: DE Munich
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Munich
- Agency: Coats & Bennett, P.L.L.C.
- Priority: EP04006933 20040323
- Main IPC: H04K1/10
- IPC: H04K1/10

Abstract:
According to one embodiment, a method for tracking rapid changes in frequency and phase offset in an Orthogonal Frequency Division Multiplexing (OFDM) receiver includes correcting a frequency error of a received OFDM symbol. A Fourier transform operation is performed resulting in a number of independently modulated subcarriers. An initial coarse estimate of the phase of the received OFDM symbol is performed based on the phase of pilot subcarriers. An initial correction of a symbol phase is performed. A data-driven phase estimation is performed on the corrected symbol resulting in a refined phase estimate. A second, more precise, correction of the received OFDM symbol phase is performed. Phase and frequency tracking is performed based on the refined phase estimated.
Public/Granted literature
- US20050213678A1 Tracking system comprised in an OFDM receiver Public/Granted day:2005-09-29
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