Multi-user code division multiple access receiver
1997 (English)Patent (Other (popular science, discussion, etc.))
A receiver and method for receiving a code-division multiple-access (CDMA) signal combining symbol values spread by a plurality of spreading codes, which method comprises the steps of:(a) converting the CDMA signal to a baseband signal; (b) recognizing symbol boundaries in every multipath for every user in the baseband signal to produce a delay estimate; (c) estimating an attenuation and phase rotation impressed on the signal by each multipath to produce channel estimates; (d) generating new symbol estimates for every user at a sampling rate that is greater than a symbol rate of the signal; (e) generating an estimate of the received signal using said symbol estimates and channel estimates; (f) comparing the received signal with its estimate and feeding estimation error back to a means for estimating the transmitted symbols; (g) sampling the symbol estimates at the estimated symbol boundaries of each user to obtain final symbol estimates; and(h) repeating steps (b) through (g) with every new sample.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-63199OAI: oai:DiVA.org:kth-63199DiVA: diva2:481782
US 6240099-B1 (2001-05-29)
CN 1197283-C (2005-04-13)2012-01-222012-01-222013-08-09Bibliographically approved