Importance

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Abstract

A method for transmitting signals, and digital signals in particular, from a given point such as a base station (BS) to a terminal such as a mobile communications network terminal (T) envisages that said terminal (T) generates pulse signals at determined instants. The base station (BS) detects the received waveforms, which have been altered as a result of phenomena such as multipath propagation, for example. The waveforms thus detected are subjected to phase conjugation, e.g., in the form of time reversal. Transmission form the base station (BS) to the terminal (T) takes place using waveforms corresponding to the phase conjugated waveforms thus obtained. In this way, a waveform corresponding to that of the aforesaid pulse signals can be reconstituted at terminal (T). Reconstitution takes place only at the geographical position occupied by the terminal (T), without requiring the base station to track the terminal's geographical location and without the need to divide geographical areas into cells in order to permit frequency reuse.

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First Claim