Equal phase combining technique for a robust OFDM system

Details Equal phase combining technique for a robust OFDM system Equal phase combining technique for a robust OFDM system

2008-07-10

2011-11-01

Corrielus, Jean B (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

C375S285000, C375S350000, C370S206000

Reexamination Certificate

active

08050335

ABSTRACT:
A technique for an equal phase combining for a robust orthogonal frequency division multiplexing (OFDM) system under high delay spread channel is disclosed. In one embodiment, a method includes receiving and synchronizing transmitted OFDM symbols having cyclic prefixes via a symbol synchronizer module, removing the cyclic prefixes from the OFDM symbols, via a cyclic prefix remover module, to form time domain symbols, converting the time domain symbols to frequency domain symbols via an FFT module, equalizing a received sub-carrier with complex conjugate of estimated channel coefficients in frequency domain at the same sub-carrier frequency via an equalizer, combining the frequency domain symbols spread over multiple sub-carriers during transmission via a combiner, and detecting phase information from the mapped combined PSK constellation symbol via a detector module.

REFERENCES:
patent: 6549583 (2003-04-01), Crawford
patent: 6633616 (2003-10-01), Crawford
patent: 7593378 (2009-09-01), Murali et al.
patent: 2005/0036563 (2005-02-01), Suzuki et al.
patent: 2006/0198472 (2006-09-01), Nakamura et al.
patent: 2008/0118012 (2008-05-01), Corke et al.

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