Channel response calculation in an OFDM receiver

Details Channel response calculation in an OFDM receiver Channel response calculation in an OFDM receiver

2008-07-15

2011-10-18

Ha, Dac (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

08040962

ABSTRACT:
An efficient algorithm is described for use with OFDM receivers that characterizes the impulse response of a communication channel using frequency domain techniques that reduce computational and memory requirements, relative to time-domain cross-correlation methods, without sacrificing algorithm performance. An FFT engine is used to transform a time domain input sequence, the transformed sequence is multiplied by the conjugate of the expected sequence, the product of several sequences is averaged, then the FFT engine transforms the average back to a time domain sequence, the magnitude of which is the impulse response of the channel.

REFERENCES:
patent: 2003/0063700 (2003-04-01), Tzou et al.
patent: 2003/0227866 (2003-12-01), Yamaguchi
patent: 2007/0058081 (2007-03-01), Kim et al.

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