Abstract: A method for delineating a data stream transmitted by a communication system using a protocol stack includes: analyzing the redundancy of sequences, the content of which is set on one or more layers in a protocol stack to delineate packets, errored or not, in a continuous data stream; the method to this end including searching in the receiver for sequences corresponding to a known sequence SP present in the received stream, and doing so by detecting sequences similar to this known sequence, the non-similar sequences not being retained; the method further including, in the presence of similar sequences, storing their position to determine the start of the packets.

Abstract: The subject of the present invention is a method for correcting transmission errors in a data stream transmitted by a communications system using a protocol stack. According to the invention, the method consists in utilizing the redundancy of sequences whose content is fixed across several layers in a stack of protocols so as to correct transmission errors; the method consisting to this end in searching at the level of the receiver for sequences corresponding to a known sequence present in the stream received and doing so by detecting sequences similar to this known sequence, non-similar sequences not being retained; the method consisting furthermore, when similar sequences are present, in detecting transmission errors in the known sequence and in modifying the similar sequences (erroneous sequences) with the aid of the known sequence.

Abstract: A method for delineating a data stream transmitted by a communication system using a protocol stack includes: analyzing the redundancy of sequences, the content of which is set on one or more layers in a protocol stack to delineate packets, errored or not, in a continuous data stream; the method to this end including searching in the receiver for sequences corresponding to a known sequence SP present in the received stream, and doing so by detecting sequences similar to this known sequence, the non-similar sequences not being retained; the method further including, in the presence of similar sequences, storing their position to determine the start of the packets.

Abstract: A ground-based beam-forming system includes a satellite and a ground-based processing base equipped with beam-forming means. The satellite is equipped with first transmission/reception means for sending and receiving analog signals with remote terminals, and second transmission/reception means for sending and receiving signals with ground-based third transmission/reception means communicating with the processing base. The satellite includes digitizing means suitable for converting analog signals received by the first transmission/reception means into digital signals, the digitizing means being directly connected to the first transmission/reception means.

Abstract: The subject of the present invention is a method for correcting transmission errors in a data stream transmitted by a communications system using a protocol stack. According to the invention, the method consists in utilizing the redundancy of sequences whose content is fixed across several layers in a stack of protocols so as to correct transmission errors; the method consisting to this end in searching at the level of the receiver for sequences corresponding to a known sequence present in the stream received and doing so by detecting sequences similar to this known sequence, non-similar sequences not being retained; the method consisting furthermore, when similar sequences are present, in detecting transmission errors in the known sequence and in modifying the similar sequences (erroneous sequences) with the aid of the known sequence.