Method and circuit arrangement for processing received signal

Details Method and circuit arrangement for processing received signal Method and circuit arrangement for processing received signal

1996-05-03

1998-09-22

Le, Amanda

Pulse or digital communications

Receivers

Angle modulation

375349, 375350, 364724012, 3647241, 36472416, 36472419, 348538, 348555, G06F 1717

Patent

active

058126082

ABSTRACT:
The invention is related to a method and circuit arrangement for processing a received signal in a variable symbol rate system, such as a digital television system. In the method and arrangement according to the system, a received signal is sampled at a fixed sampling frequency (f.sub.f) that is higher than the symbol frequency of any one of the received signals. The resulting sample sequence is converted to another sample sequence the sampling frequency of which equals the symbol frequency (f.sub.i) of the received signal or its integer multiple. Then the samples are filtered (8) and signal value decisions are made (9) for the filtered samples. Conversion of the sampling frequency is advantageously performed using a so-called modified Farrow-type fractional delay filter (6) which is controlled using a control signal proportional to the delay of each sample. Using the method and arrangement according to the invention it is possible to process received signals the symbol frequencies of which are arbitrary within set limits.

REFERENCES:
patent: 4866647 (1989-09-01), Farrow
patent: 5500874 (1996-03-01), Terrell
patent: 5504785 (1996-04-01), Becker et al.
patent: 5530406 (1996-06-01), Fernandez Duran et al.
patent: 5612975 (1997-03-01), Becker et al.
patent: 5621404 (1997-04-01), Heiss et al.

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