TW200642339A - Method and system for impulse noise rejection in OFDM system - Google Patents

Method and system for impulse noise rejection in OFDM system

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Publication number
TW200642339A
TW200642339A TW094115989A TW94115989A TW200642339A TW 200642339 A TW200642339 A TW 200642339A TW 094115989 A TW094115989 A TW 094115989A TW 94115989 A TW94115989 A TW 94115989A TW 200642339 A TW200642339 A TW 200642339A
Authority
TW
Taiwan
Prior art keywords
impulse noise
estimated
converting
ofdm
noise rejection
Prior art date
Application number
TW094115989A
Other languages
Chinese (zh)
Other versions
TWI269546B (en
Inventor
Tsung-Liang Chen
Original Assignee
Afa Technologies Inc
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Publication date
Application filed by Afa Technologies Inc filed Critical Afa Technologies Inc
Priority to TW94115989A priority Critical patent/TWI269546B/en
Publication of TW200642339A publication Critical patent/TW200642339A/en
Application granted granted Critical
Publication of TWI269546B publication Critical patent/TWI269546B/en

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  • Noise Elimination (AREA)

Abstract

An impulse noise rejection system for an orthogonal frequency division multiplexing (OFDM) communications system and related methods are disclosed. The impulse noise rejection system detects presence of impulse noise in an OFDM symbol in time domain, and compensates for the impulse noise in frequency domain. Impulse noise corrupted OFDM symbol is "down-converted" such that the impulse noise component of the FFT output is a slow-varying waveform. Impulse noise at all subcarriers is estimated by interpolating the estimated impulse noise at pilot subcarriers in the slow-varying waveform. Impulse noise free FFT output is obtained using the estimated impulse noise and an "up-converting" process. The apparatus and algorithm for optimizing the down-converting frequency and up-converting frequency are described.
TW94115989A 2005-05-17 2005-05-17 Method and system for impulse noise rejection in OFDM system TWI269546B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94115989A TWI269546B (en) 2005-05-17 2005-05-17 Method and system for impulse noise rejection in OFDM system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94115989A TWI269546B (en) 2005-05-17 2005-05-17 Method and system for impulse noise rejection in OFDM system

Publications (2)

Publication Number Publication Date
TW200642339A true TW200642339A (en) 2006-12-01
TWI269546B TWI269546B (en) 2006-12-21

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TW94115989A TWI269546B (en) 2005-05-17 2005-05-17 Method and system for impulse noise rejection in OFDM system

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8724447B2 (en) 2004-01-28 2014-05-13 Qualcomm Incorporated Timing estimation in an OFDM receiver
US8433005B2 (en) 2004-01-28 2013-04-30 Qualcomm Incorporated Frame synchronization and initial symbol timing acquisition system and method
US7912057B2 (en) 2007-01-12 2011-03-22 Wi-Lan Inc. Convergence sublayer for use in a wireless broadcasting system
US8548520B2 (en) 2007-01-26 2013-10-01 Wi-Lan Inc. Multiple network access system and method
US8718030B2 (en) 2007-03-26 2014-05-06 Qualcomm Incorporated Methods and apparatus for performing channel tree operations
KR101455393B1 (en) 2008-03-03 2014-10-27 삼성전자주식회사 Method and apparatus for transmitting/receiving contorl information in a wireless communication system
TWI365650B (en) 2008-04-09 2012-06-01 Ind Tech Res Inst Transmission method of wireless signal and transmitter using the same

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Publication number Publication date
TWI269546B (en) 2006-12-21

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