Abstract: The invention indicates a method for signal processing of an amplitude-modulated and/or phase-modulated high-frequency signal (RF signal), in which the RF signal is broken down into two signals (FM1 and FM2) by relative phase displacement by an angle +? and ?? and the signals are amplified before they are added to form a transmission signal, and to a circuit arrangement in which the pure phase-modulated RF signal is multiplied in a first branch by cos ? and in a second branch by sin ? and the two signals (FM1, FM2) are obtained by respective summation and subtraction of the multiplied signals.

Abstract: A method and a device for conditioning electric installations in buildings for the rapid transmission of data produces symmetrical transmissions paths, along which high frequency signals can be transmitted with substantially no interference, using low-level emission. By introducing an inductance coil into the neutral conductor, as closely as possible to the earth point of the building, the conductor becomes insulated for high frequencies whereas the remaining conductors constitute the high-frequency earth. The high-frequency communication signals are transmitted between the neutral conductor and the protective conductor. This produces transmission channels with relatively good symmetry and negligible interference, which permit a significantly improved exploitation of resources.