Transmission system comprising timing recovery

Details Transmission system comprising timing recovery Transmission system comprising timing recovery

1994-01-19

1996-09-24

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

375316, 375369, H04L 2700, H04L 2706, H04L 2538

Patent

active

055598331

ABSTRACT:
The invention relates to a device for recovering a symbol timing for the decoding of received signals formed by code-modulation symbols transmitted in an orthogonal frequency-division multiplexing mode (OFDM). The signals are formatted in symbol blocks of which each block presents redundant information. The invention comprises means for delaying the symbol blocks and for subtracting from a symbol block the delayed symbol block corresponding thereto. In this manner a difference signal e(t) is obtained which is used for controlling a loop formed by a local oscillator operating at the clock frequency, a frequency divider and a phase comparator.

REFERENCES:
patent: 3599103 (1971-08-01), Nussbaumer
patent: 3883729 (1975-05-01), De Cremiers
patent: 5230013 (1993-07-01), Hanke et al.
"Applications of the digital correlator" J. Eldon, Microprocessors and Microsystems, vol. 12, No. 4, May 1988, pp. 214-224.

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