Synchronization method and system for a digital receiver

Details Synchronization method and system for a digital receiver Synchronization method and system for a digital receiver

1997-06-11

2000-05-02

Vu, Huy D.

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

370503, 375362, H04J 306, H04L 704

Patent

active

060581018

ABSTRACT:
A synchronization system and method for obtaining frame, carrier, and sampling synchronization of an input OFDM modulated digital signal having a pseudoperiodic second symbol. The system includes an apparatus for obtaining frame synchronization, and the apparatus includes an envelope detector to detect the first symbol of the input signal, and a differentiator connected to the envelope detector to detect the second symbol. The differentiator includes a first filter having a transfer function H(z)=(1+z.sup.-1) and a second filter having a transfer function H.sub.p (z)=(1-z.sup.-n/2 +z.sup.-n -z.sup.-3n/2), where n equals to a number of samples in the input signal. Synchronization of the carrier frequency offset is obtained by first obtaining the fractional carrier frequency offset, and then obtaining the integral carrier frequency offset through a matched filtering process. Sampling frequency synchronization is obtained through the matched filtering process for determining integral carrier frequency offset.

REFERENCES:
patent: 4393272 (1983-07-01), Itakura et al.
patent: 5170413 (1992-12-01), Hess et al.
patent: 5313169 (1994-05-01), Fouche et al.
patent: 5402334 (1995-03-01), Pecora et al.
patent: 5444697 (1995-08-01), Leung et al.
patent: 5479363 (1995-12-01), Willson, Jr. et al.
patent: 5550812 (1996-08-01), Philips
patent: 5710729 (1998-01-01), Feste et al.
patent: 5751777 (1998-05-01), Zampetti
patent: 5812523 (1998-09-01), Isaksson et al.
Classen, et al., "Frequency Synchronization Algorithms for OFDM Systems Suitable for Communication over Frequency Selective Fading Channels", IEEE 1655-59, (1994).
Daffara, et al., "A New Frequency Detector for Orthogonal Multicarrier Transmission Techniques", IEEE 804-809 (1995).
Le Floch, et al., "Digital Sound Broadcasting to Mobile Receivers", IEEE 493-503, (1989).
Moose, "A Technique for Orthogonal Frequency Division Multiplexing Frequency Offset Correction", IEEE 2908-14, (1994).
Pollet, et al., "BER Sensitivity of OFDM Systems to Carrier Frequency Offset and Wiener Phase Noise", IEEE 191-193 (1995).
Shelswell, "The COFDM modulation system: the heart of digital audio broadcasting", Electronics & Communication Engineering Journal, 127-136 (Jun., 1995).

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