Fast Analog Beam Tracking in Phased Antenna Arrays: Theory and Performance
arXiv:1710.07873
Abstract
The directionality of millimeter-wave (mmWave) communications introduces a significant challenge in serving fast-rotating/moving terminals, e.g., mobile AR/VR, high-speed vehicles, trains, UAVs.This challenge is exacerbated in mmWave systems using analog beamforming, because of the inherent non-convexity in the analog beam tracking problem. In this paper, we obtain the Cramér-Rao lower bound (CRLB) of beam tracking and optimize the analog beamforming vectors to get the minimum CRLB. Then, we develop a low complexity analog beam tracking algorithm that simultaneously optimizes the analog beamforming vector and the estimate of beam direction. Finally, by establishing a new basic theory, we provide the theoretical convergence analysis of the proposed analog beam tracking algorithm, which proves that the minimum CRLB of the MSE is achievable with high probability. Our simulations show that this algorithm can achieve faster tracking speed, higher tracking accuracy and higher data rate than several state-of-the-art algorithms. The key analytical tools used in our algorithm design are stochastic approximation and recursive estimation with a control parameter.
40 pages, 12 figures
References in corpus (8)
- An Overview of Signal Processing Techniques for Millimeter Wave MIMO Systems
- Channel Estimation and Hybrid Precoding for Millimeter Wave Cellular Systems
- Millimeter Wave Beamforming for Wireless Backhaul and Access in Small Cell Networks
- Enabling UAV Cellular with Millimeter-Wave Communication: Potentials and Approaches
- Compressed Sensing Based Multi-User Millimeter Wave Systems: How Many Measurements Are Needed?
- Optimal Precoders for Tracking the AoD and AoA of a mm-Wave Path
- New Beam Tracking Technique for Millimeter Wave-band Communications
- Mobile Millimeter Wave Channel Acquisition, Tracking, and Abrupt Change Detection
Cited by in corpus (8)
- Fast Accurate Beam and Channel Tracking for Two-dimensional Phased Antenna Arrays
- How to Mobilize mmWave: A Joint Beam and Channel Tracking Approach
- Continuous Beam Alignment for Mobile MIMO
- Joint Beam and Channel Tracking for Two-Dimensional Phased Antenna Arrays
- Analog Beam Tracking in Linear Antenna Arrays: Convergence, Optimality, and Performance
- Joint Tracking of Multiple Beams in Beamspace MIMO Systems
- Super Fast Beam and Channel Tracking in 2D Phased Antenna Arrays
- Time-Sequence Channel Inference for Beam Alignment in Vehicular Networks