OFDM RECEIVER

PURPOSE: An orthogonal frequency division multiplex(OFDM) receiver is provided to detect and correct a carrier frequency offset of a received signal. CONSTITUTION: The OFDM receiver samples an incoming call signal in time domain and correlates the sampled signal with an OFDM signal of a version, hav...

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Bibliographic Details
Main Authors BELOTSERKOVSKY MAXIM B, LITWIN LOUIS ROBERT JR
Format Patent
LanguageEnglish
Korean
Published 29.08.2001
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PURPOSE: An orthogonal frequency division multiplex(OFDM) receiver is provided to detect and correct a carrier frequency offset of a received signal. CONSTITUTION: The OFDM receiver samples an incoming call signal in time domain and correlates the sampled signal with an OFDM signal of a version, having a training symbol or a reference symbol to generate a correlation sequence. A peak detector(70) detects a correlation peak in the correlation sequence, and the index of the correlation peak is set as a reference point(72, 74). The OFDM receiver acquires the incoming call signal at a position which is located from a reference point by a prescribed distance(74). Then a phase difference between the acquired sample and an output of a local oscillator is calculated(74). Then the frequency of the local oscillator is adjusted, and the calculated phase difference is reduced(76, 80). The acquired sample has a known phase equal to the phase of the output of the local oscillator, when no carrier frequency offset exists.
Bibliography:Application Number: KR20010007044