Title :
Distance-Weighted Throughput for Multi-Antenna Wireless Networks with Multi-User Links
Author :
Peel, Christian B. ; Swindlehurst, A. Lee ; Dahlhaus, Dirk
Author_Institution :
Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT
Abstract :
Recent results on the throughput achievable with wireless networks have not fully considered multiple antennas and multi-user links. We introduce these topics by giving the transport capacity of the multiple-antenna multiple-access and broadcast channels. We use these topologies at the physical layer of an ad-hoc network to obtain achievable distance-weighted rates for a multi-antenna wireless network. These values are obtained by maximizing the distance-weighted rate over all combinations of point-to-point, uplink, and downlink topologies, respectively. A distributed algorithm which seeks a Nash equilibrium is used to optimize the transmit covariance matrices for the centralized topology search. Numerical examples with a uniform per-node power constraint show the benefit of uplink topologies over downlink and point-to-point topologies, especially at high transmit power, high numbers of antennas, and a large number of nodes
Keywords :
ad hoc networks; antenna arrays; broadcast channels; covariance matrices; telecommunication network topology; Nash equilibrium; ad-hoc network; broadcast channels; distance-weighted rates; distance-weighted throughput; downlink topologies; multi-antenna wireless networks; multi-user links; multiple-antenna multiple-access channels; point-to-point topologies; transmit covariance matrices; uplink topologies; Ad hoc networks; Broadcasting; Covariance matrix; Distributed algorithms; Downlink; Nash equilibrium; Network topology; Physical layer; Throughput; Wireless networks;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1682955
