OFDM receiver, mode detector therefor, and method for...

Details OFDM receiver, mode detector therefor, and method for... OFDM receiver, mode detector therefor, and method for...

2008-01-15

2008-01-15

Vanderpuye, Kenneth (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C370S208000, C370S335000, C375S260000, C708S005000, C708S200000, C708S400000

Reexamination Certificate

active

07319659

ABSTRACT:
A method of mode detection for OFDM signals. The method comprises the steps of delaying the OFDM signal for a first and second number of samples, multiplying the two delayed signals by coefficient signals, and deriving a sum of the two products, deriving an error signal by subtracting the sum of the two products from the OFDM signal, extracting amplitudes of the coefficient signals, and accordingly deriving step size signals, updating the coefficient signals according to the error signal and step size signals, detecting edges of the amplitudes of the coefficient signals, and determining the guard interval length and transmission mode according to the detected edges.

REFERENCES:
patent: 5787123 (1998-07-01), Okada et al.
patent: 6108353 (2000-08-01), Nakamura et al.
patent: 6330293 (2001-12-01), Klank et al.

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