Device for receiving a digital signal
AssigneeDiwel
InventorPascal Cadic
Life of this patent
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Abstract
The present invention concerns the field of digital signal receivers provided with means of synchronisation with the transmitter and more particularly digital synchronisation means. The invention describes a synchronisation method solely based on the measurement of the frame time and the bit time in accumulators. These measurements are used to adjust the sampling clock of the receiver.
Claims11
Device for receiving a digital signal in the form of a bit stream forming frames of fixed length comprising a preamble consisting of a fixed number of 0 and 1 bits in alternation, a bit synchronisation word comprising an isolated transition, a frame synchronisation word reproducing a given value and useful data, characterised in that it comprises:
- preamble detection means for supplying a measurement of the transmission time of a frame and the frame start moment;
- symbol detection means for aligning the receiver on the frame starts;
- acquisition means for sampling each bit of the signal.
Method for receiving, by a reception device, a digital signal transmitted in the form of a bit stream forming frames of fixed length comprising a preamble consisting of a fixed number of 0 and 1 bits in alternation, a bit synchronisation word comprising an isolated transition, a frame synchronisation word reproducing a given value and useful data, characterised in that the reception device performs the following steps:
- detecting the preamble for supplying a measurement of the transmission time of a frame and the frame start moment;
- detecting symbol for aligning the receiver on the frame starts;
- acquiring for sampling each bit of the signal.
Dependencies are inferred from the claim text.