PERFORMANCE OF DIRECTIONAL MAC PROTOCOLS INAD HOC NETWORKS WITH POSITION ESTIMATION ERRORS

Department of Electrical and Computer Engineering

Montreal, Quebec, HEG 1M8, Canadae

Several recently proposed directional MAC proto-cols for mobile ad hoc networks incorporate the

positions of the destination stations, as well as the interfering ones, in the beamforming process at

each mobile station. Assuming perfect node position estimation, these protocols have shown to

When perfect node position information is available, it was noticed that increasing the number of

antenna elements can play an important role in improving the total system throughput for these

directional MAC protocols.

We investigate the effect of inaccurate node position estimation on the throughput of these

protocols over both Gaussian and Ricean fading channels. Our results show that, in contrary to the

ideal case, as the position estimation error increases, the system throughput dramatically decreases

with the number of antennas.