Transmission capacity of ad-hoc networks with multiple antennas using transmit stream adaptation and interference cancelation

  • Authors:
  • Rahul Vaze;Robert W. Heath, Jr.

  • Affiliations:
  • Tata Institute of Fundamental Research, School of Technology and Computer Science, Mumbai;The University of Texas at Austin, Department of Electrical and Computer Engineering, Wireless Networking and Communications Group, Austin, TX

  • Venue:
  • Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
  • Year:
  • 2009

Quantified Score

Hi-index 0.00

Visualization

Abstract

The transmission capacity of an ad-hoc network is the maximum density of active transmitters in an unit area, given an outage constraint at each receiver for a fixed rate of transmission. Assuming channel state information is available at the receiver, this paper presents bounds on the transmission capacity as a function of the number of antennas used for transmission, and the spatial receive degrees of freedom used for interference cancelation at the receiver. Canceling the strongest interferers, using a single antenna for transmission together with using all but one spatial receive degrees of freedom for interference cancelation is shown to maximize the transmission capacity. Canceling the closest interferers, using a single antenna for transmission together with using a fraction of the total spatial receive degrees of freedom for interference cancelation depending on the path loss exponent, is shown to maximize the transmission capacity.