Method for estimating the symbols of a digital signal and...

Details Method for estimating the symbols of a digital signal and... Method for estimating the symbols of a digital signal and...

2011-07-26

2011-07-26

Payne, David (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S259000, C375S316000, C375S342000, C375S308000, C375S355000, C370S208000, C370S335000, C370S342000

Reexamination Certificate

active

07986737

ABSTRACT:
The invention relates to a method of estimating symbols carried by a digital signal that is received by a receiver over a communication channel (5), said symbols being multiplexed on orthogonal frequency sub-carriers. The inventive method comprises the following steps in relation to each symbol carried by the digital signal, consisting in: performing at least two transforms towards the frequency domain (8,9) on a portion of the received signal essentially corresponding to the symbol, said transforms being performed with a determined time lag (10) therebetween; estimating the parameters (r0, r1, . . . , rn, r′0, r′1, . . . , r′n) of the communication channel from pre-determined binary information contained in the digital signal; and estimating the symbol from a combination of the result of each of the transforms performed and the estimated communication channel parameters.

REFERENCES:
patent: 6269132 (2001-07-01), Yonge, III
patent: 2002/0018483 (2002-02-01), Kuwabara et al.
patent: 2003/0095533 (2003-05-01), Joo et al.
patent: 2003/0138060 (2003-07-01), Alcouffe
patent: 2004/0141457 (2004-07-01), Seo et al.
patent: 2006/0166634 (2006-07-01), Ido
patent: 1139623 (2001-10-01), None
patent: 0051301 (2000-08-01), None
Brugger et al., OFDM Receivers—Impact on Coverage of Inter-Symbol Interference and FFT Window Positioning, EBU Technical Review, No. 295, Jul. 2003 (12 pages).

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