Synchronization and sampling frequency in an apparatus receiving

Details Synchronization and sampling frequency in an apparatus receiving Synchronization and sampling frequency in an apparatus receiving

1997-09-16

2000-09-26

Pham, Chi H.

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

370208, 375324, 375364, H04J 1100, H04J 100

Patent

active

061251240

ABSTRACT:
An OFDM receiver determines (12; 27) the pulse response of a radio channel and locates (13; 14) its starting point, end point and the maximum and its value. The difference between the end point and the starting point gives the length of the pulse response. A guard interval time corresponding to the guard interval separating the OFDM symbols is set (17; 18) in the receiver in such a manner that it covers the most significant components of the pulse response. A slow and monotonous temporal shift of the pulse response between measurement rounds indicates an error in the sampling frequency. The error is corrected (23; 31) in such a manner that the pulse response shift is compensated for.

REFERENCES:
patent: 5471464 (1995-11-01), Ikeda
patent: 5602835 (1997-02-01), Seki et al.
patent: 5802117 (1998-09-01), Ghosh
patent: 5812523 (1998-09-01), Isaksson et al.
patent: 5818813 (1998-10-01), Saito et al.
patent: 5828710 (1998-10-01), Beale
patent: 5848107 (1998-12-01), Philips

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