Abstract: Radio relay (1) comprising a radiofrequency transceiver (2) integrating a reception channel (RX) and an emission channel (TX), and being configured to allow transmissions according to an operating cycle comprising a first full-duplex transmission period; a first half-duplex transmission period during which the reception channel (RX) is configured to allow reception; a second full-duplex transmission period; a second half-duplex transmission period during which the emission channel (TX) is configured to allow an emission.

Abstract: The invention relates in particular to a method of adjusting power spectral densities of a plurality of telecommunications lines sending data in a plurality of frequency sub-bands, a power spectral density being assigned to each sub band sending data. The method comprises the following steps: selecting at least one line, called the donor line, whose capacity for sending data is higher than a predetermined reference capacity, selecting at least one sub band of said donor line, and reducing the power spectral density assigned to the selected sub band to a predefined minimum power level in said sub band.

Abstract: A method of allocating a plurality of subbands to a plurality of streams of a multichannel link in a multicarrier modulation communications system, each stream being successively defined in a communications frame of said multichannel link by a number Mj of bits to be transmitted and a noise margin ?j. Each subband is associated with a normalized signal-to-noise ratio on the multichannel link. The subbands are classified in a specific order of the normalized signal-to-noise ratios. An energy Ei per subband is determined by a binary allocation algorithm. For each stream taken in the order of said frame, a number Nj of consecutive subbands taken in the order of normalized signal-to-noise ratios is allocated so that the sum of the numbers nij of bits in each subband allocated to each stream is equal to Mj where: M j = ? i = 1 N j ? n ij and nij=log2(1+El·(SNR0)i/?J).

Abstract: A method of allocating a plurality of subbands (SBi) to a plurality of streams (FLj) of a multichannel link in a multicarrier modulation communications system, each stream (FLj) being successively defined in a communications frame of said multichannel link by a number Mj of bits to be transmitted and a noise margin ?j. Each subband (SBi) is associated with a normalized signal-to-noise ratio (SNR0)i on the multichannel link. The subbands (SBi) are classified in a specific order of the normalized signal-to-noise ratios (SNR0)1. An energy Ei per subband (SBi) is determined by a binary allocation algorithm. For each stream (FLj) taken in the order of said frame, a number Nj of consecutive subbands (SBi) taken in the order of normalized signal-to-noise ratios is allocated so that the sum of the numbers nij of bits in each subband (SBi) allocated to each stream (FLj) is equal to Mj where: M j = ? i = 1 N j ? n ij the number nij of bits being defined by: nij=log2(1+E1·(SNR0)i/?j).

Abstract: The invention relates in particular to a method of adjusting power spectral densities of a plurality of telecommunications lines sending data in a plurality of frequency sub-bands, a power spectral density being assigned to each sub band sending data. The method comprises the following steps: selecting at least one line, called the donor line, whose capacity for sending data is higher than a predetermined reference capacity, selecting at least one sub band of said donor line, and reducing the power spectral density assigned to the selected sub band to a predefined minimum power level in said sub band.

Abstract: The invention relates in particular to a method of modifying the spectral power density of a telecommunications line sending data from a sender terminal to a receiver terminal, the spectral power density being divided between a plurality of sub-bands of data transmission frequencies of the line. This method includes the following steps: an activation message is sent from the sender terminal to the receiver terminal and the reception of that activation message by the receiver terminal causes the sending of a message requesting modification of the spectral power density transmitted in a selected sub-band from the receiver terminal to the sender terminal.

Abstract: The invention relates to a method of optimizing the distribution of transmission power between sub-channels for transmitting a digital signal in frequency-division multiplex. According to this method, a sub-channel fraction is selected so that, when the transmission power is uniformly distributed between the sub-channels of the selected fraction, the signal-to-noise ratio of each sub-channel of the fraction is greater than a previously-set value.