METHOD FOR MULTIPLE ACCESS COMMUNICATION IN A CENTRALIZED NETWORK BASED ON AN IMPULSE ULTRA LARGE PHYSICAL LAYER

摘要

A multi-access communication method in a physical network based on an ultra wideband impulse physical layer allowing code multiple access, each user being associated with a code, the user nans transmitting at the same time in a multipath propagation medium . It is characterized in that a criterion is established in order to find the codes of the different users making it possible to minimize the variance of the multi-user interference Jn at the output of a linear receiver, the received signal r (t) coming from a user expressing himself as a sum of the signal of interest rn (t) from the user n and a term corresponding to the multi-user interference, Jn wherer (t) = rn ( t) + Jn + n (t) where A k n and tau k n are respectively the amplitude and the delay of the k i path of the transmission channel between the user n and the receiver.