Title :
Multiuser detection with base station diversity
Author :
Valenti, Matthew C. ; Woerner, Brian D.
Author_Institution :
Mobile & Portable Radio Res. Group, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
A method for combining multiuser detection with base station diversity is presented for the uplink of a multiple access network composed of K transmitters and M receivers. At each base station, a K user soft-output multiuser receiver is implemented using the log maximum a posteriori (log-MAP) algorithm. The log-likelihood ratio outputs from the M base stations are combined before a final hard decision is made. This strategy has the ability to simultaneously mitigate the detrimental effects of both multiuser interference and fading, and has the potential to extend cell range and reduce the frequency reuse distance. Simulation results are shown for a time division multiple access (TDMA) network with 3 users and 3 base stations
Keywords :
cellular radio; diversity reception; fading channels; interference suppression; maximum likelihood detection; multiuser channels; radio links; radio receivers; radiofrequency interference; time division multiple access; TDMA network; base station diversity; cell range; fading; frequency reuse distance reduction; log maximum a posteriori algorithm; log-MAP algorithm; log-likelihood ratio outputs; multiple access network; multiuser detection; multiuser interference; simulation results; soft-output multiuser receiver; time division multiple access; transmitters; uplink; Base stations; Delay; Detectors; Diversity reception; Fading; Multiaccess communication; Multiple access interference; Multiuser detection; Signal detection; Time division multiple access;
Conference_Titel :
Universal Personal Communications, 1998. ICUPC '98. IEEE 1998 International Conference on
Conference_Location :
Florence
Print_ISBN :
0-7803-5106-1
DOI :
10.1109/ICUPC.1998.733686
