Systems for multipoint-to-point communication using orthogonal frequency division multiplexing and identification codes are provided. In one embodiment, a system comprises: a host unit; and a plurality of remote units using a multiple access scheme to communicate at the same time with the host unit using...http://www.google.fr/patents/US7480236?utm_source=gb-gplus-shareBrevet US7480236 - Multipoint-to-point communication using orthgonal frequency division multiplexing and identification codes
Multipoint-to-point communication using orthgonal frequency division ...
