Paper Info
Title
Initial Beam Association in Millimeter Wave Cellular Systems: Analysis and Design Insights.
Abstract
Enabling the high data rates of millimeter wave (mmWave) cellular systems requires deploying large antenna arrays at both the basestations and mobile users. Prior work on coverage and rate of mmWave cellular networks focused on the case when basestations and mobile beamforming vectors are predesigned for maximum beamforming gains. Designing beamforming/combining vectors, though, requires training, which may impact both the SINR coverage and rate of mmWave systems. This paper evaluates mmWave cellular network performance while accounting for the beam training/association overhead. First, a model for the initial beam association is developed based on beam sweeping and downlink control pilot reuse. To incorporate the impact of beam training, a new metric, called the effective reliable rate, is defined and adopted. Using stochastic geometry, the effective rate of mmWave cellular networks is derived for two special cases: near-orthogonal pilots and full pilot reuse. Analytical and simulation results provide insights into the answers of two important questions. First, what is the impact of beam association on mmWave network performance? Then, should orthogonal or reused pilots be employed? The results show that unless the employed beams are very wide, initial beam training with full pilot reuse is nearly as good as perfect beam alignment.
Year
DOI
Venue
2017
10.1109/TWC.2017.2666806
IEEE Trans. Wireless Communications
Keywords
DocType
Volume
Training,Cellular networks,Array signal processing,Antenna arrays,Interference,NIST,Measurement
Journal
abs/1602.06598
Issue
ISSN
Citations 
5
1536-1276
22
PageRank 
References 
Authors
0.80
23
5
Name
Order
Citations
PageRank
Ahmed Alkhateeb1170867.18
Young-han Nam256734.18
Md. Saifur Rahman3637.51
Jianzhong Zhang416016.28
Robert W. Heath514415885.64