The method involves transmitting information symbol in the form of a source signal constituted of a sequence of identical frames corresponding to a symbol time, by a source terminal to a recipient terminal. Each frame has a pulse modulated in position by a pulse-position modulation alphabet. The source signal is received, and a modulation position of a pulse in a frame of the received signal is detected by a relay terminal. A relayed signal, containing a pulse whose position is obtained from the detected position by a circular permutation of the alphabet, is transmitted. Independent claims are also included for the following: (1) an emission or reception module of a pulsed ultra wideband (UWB) telecommunication terminal (2) a reception terminal of a pulsed ultra wideband (UWB) telecommunication terminal.
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