Digital transmission system using an analog signal made up of pulses to be gaussian or cos2 of opposite polarities.

摘要

The invention relates to a digital transmission system based on the consecutive substitution of pulses of Gaussian or cos2 form, of alternately opposite polarities, for the rectangular pulses of a baseband digital signal. To this end, the binary signal: either coded in half-width two-phase mode, which further reduces the frequency spectrum of the resultant signal, or presented by an n-bit set, for example the dibit, in which the 2n combinations modulate the return-to-zero time of the alternations in an analogue way. The resultant signal is characterised by: its good clock component, the absence of lobes outside its frequency-occupation band lying between 1/4T and 1/2T, and the clocked repetition of the waves in a predetermined form. Such a digitised analogue signal makes it possible, simultaneously, to carry out spatial multiplexing and time-based multiplexing, and consequently to increase the information throughput transmitted over any transmission medium. The invention finds its application in telecommunications, remote computing, data communications, etc. for carrying out transmission, transfer or storage of the digital information. IMAGE