Abstract: Efficiency of a digital link, e.g., a microwave link, is improved by coding numeric signals for transmission so as to transmit selected sequences, in terms of peak power of a filtered signal, for transmission through the link. The most favorable numeric sequences may be encoded by baseband numeric coding.

Abstract: A circuit device for interconnecting several processing units equipped with microprocessors includes at least two connection ports connecting the circuit device to the processing units, including a control unit for managing connection peculiarities using lock intelligence; an interface control unit for interfacing the processing units to memory; control unit for controlling the circuit device, connected to the connection ports and to the interface control unit, and for handling reading and writing of data to and from the connection ports and the interface control unit.

Abstract: A method of estimating the carrier frequency of a numeric signal, in which two estimates of the carrier phase are carried out in successive instants of time and the estimated carrier frequency is obtained from the comparison of the above two estimates. The invention also concerns a device for implementing the method, the device including a circuit for estimating the phase of the signal at successive instants in time, a circuit for storing the estimates, and a circuit for comparing the estimates. In a preferred embodiment, both the phase estimator and the comparison circuit are implemented by multipliers and adders.

Abstract: A method for reducing the phase noise introduced in the resynchronization of digital signals using positive, negative or positive-negative justification, in which a phase comparison signal representing the phase difference between signals from a local clock and a remote clock is generated, the comparison signal is modified by a suitable scale factor, the scaled phase comparison signal is integrated at a suitable frequency, the integrated signal is quantized by comparing the integrated signal with predetermined thresholds, and the transitions of the quantized signal are used to determine the justification events which are to be overlapped to a local unjustified clock rate to generate a local justified clock signal.