Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-08-29
2006-08-29
Tse, Young T. (Department: 2637)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S260000, C375S262000, C375S341000, C370S210000
Reexamination Certificate
active
07099413
ABSTRACT:
Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative forward processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.
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Chuang Justin C.
Li Ye
Lin Lang
AT&T Corp.
Tse Young T.
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