Capacity and Scaling Laws of Dense mmWave and Interference Alignment Ad Hoc Networks


A. Thornburg, Robert Daniels, and R. W. Heath, Jr.


to appear in Proc. of the IEEE Military Communications Conference, Baltimore, MD, October 1-3, 2016.


Millimeter wave (mmWave) networks show promise due to available bandwidth and interference suppression with directional beamforming. We compare the uncoordinated directional beamforming interference mitigation with a popular coordinated scheme, interference alignment (IA). In this paper, we show the scaling laws for dense mmWave ad hoc networks with directional beamforming and ad hoc networks with IA. We also give an exact expression for the capacity of mmWave ad hoc networks with random dipole distance. Our results indicate that the number of antennas with uncoordinated beamforming must scale sub-linearly with the user density while the number of users coordinating with IA must scale super-linearly.