Spatial interference cancelation for mobile Ad hoc networks: Imperfect CSI

Kaibin Huang*, Robert W. Heath, Jeffrey G. Andrews, Dongning Guo, Randall A. Berry

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Spatial interference cancelation based on zeroforcing beamforming significantly improves the throughput of a mobile ad hoc network. Nevertheless, the performance of spatial interference cancelation can be degraded by imperfect channel estimation at receivers. We analyze the impact of inaccurate channel state information (CSI) on network transmission capacity by modeling transmitters as a Poisson point process and applying mathematical tools from stochastic geometry. CSI inaccuracy leads to smaller throughput and larger outage probability of each data link. Such performance loss can be controlled by choosing the length of training sequences as derived. Furthermore, increasing this length logarithmically with the inverse of the decreasing target outage probability achieves the same network-capacity scaling laws as for perfect CSI. Simulation results show that spatial interference cancelation increases transmission capacity by an order of magnitude or more despite CSI inaccuracy.

Original languageEnglish (US)
Title of host publication2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008
Pages131-135
Number of pages5
DOIs
StatePublished - Dec 1 2008
Event2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008 - Pacific Grove, CA, United States
Duration: Oct 26 2008Oct 29 2008

Other

Other2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008
CountryUnited States
CityPacific Grove, CA
Period10/26/0810/29/08

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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    Huang, K., Heath, R. W., Andrews, J. G., Guo, D., & Berry, R. A. (2008). Spatial interference cancelation for mobile Ad hoc networks: Imperfect CSI. In 2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008 (pp. 131-135). [5074377] https://doi.org/10.1109/ACSSC.2008.5074377