Abstract: Transport frames to be transmitted on a communication channel are formed from coded-signal frames. Each coded-signal frame comprises one or more sets of bits to be protected against transmission errors. A respective error detection code is calculated for a subset of bits, and placed in a respective transport frame along with this subset of bits. Some at least of the transport frames contain a plurality of subsets of bits, emanating from different coded-signal frames and accompanied by the corresponding error detection codes.

Abstract: A method for analog/digital conversion of a radiocommunication signal using an analog analog/digital converter preceded by variable gain amplifier, wherein the frequency band of the converted signal contains at least one useful channel, comprises steps for controlling the value of the gain of the amplifier in such a way that the power in the frequency band of the converted signal is less than a limit saturation value of the analog/digital converter. However, the power in the useful channel is substantially equal to a mean power level having a first predetermined value in the case of static propagation in the useful channel or a second predetermined value, different from said first predetermined value, in the case of dynamic propagation in the useful channel.

Abstract: The invention concerns a method and a device for measuring the power of an electric signal (S) enabling to: (a) produce a series of successive samples (Sn) of the signal (S); (b) producing a sequence of successive values (Pn) of the signal (S) instantaneous power, each of said values being obtained from the value of a respective sample of the sequence of successive values (Sn) of the signal (S); (c) producing N sequences of successive values (Pjn) of the average power of the signal (S) on respectively N time windows with increasing respective widths, where N is an integer such that N≧2, from the values of die sequence of successive values (Pn) of the signal (S) instantaneous power.

Abstract: A method for analog/digital conversion of a radiocommunication signal using an analog analog/digital converter preceded by variable gain amplifier, wherein the frequency band of the converted signal contains at least one useful channel, comprises steps for controlling the value of the gain of the amplifier in such a way that the power in the frequency band of the converted signal is less than a limit saturation value of the analog/digital converter. However, the power in the useful channel is substantially equal to a mean power level having a first predetermined value in the case of static propagation in the useful channel or a second predetermined value, different from said first predetermined value, in the case of dynamic propagation in the useful channel.