Wideband Beamforming with Rainbow Beam Training using Reconfigurable True-Time-Delay Arrays for Millimeter-Wave Wireless

• DOI: 10.48550/arxiv.2111.15191
• Publication Date: 2021-01-01
• Authors: Chung-Ching Lin; Veljko Boljanovic; Yan Han; Erfan Ghaderi; Mohammad Ali Mokri; Jayce Jeron Gaddis; Aditya Wadaskar; Chase Puglisi; Soumen Mohapatra; Qiuyan Xu; Sreeni Poolakkal; Deukhyoun Heo; Subhanshu Gupta; Danijela Čabrić
• Keywords: True time delay; Wideband; Extremely high frequency

The decadal research in integrated true-time-delay arrays have seen organic growth enabling realization of wideband beamformers for large with wide aperture widths. This article introduces highly reconfigurable delay elements implementable at analog or digital baseband that enables multiple SSP functions including beamforming, interference cancellation, and fast beam training. Details the beam-training algorithm, system design considerations, architecture circuits range-to-resolution ratios are presented leveraging compensation techniques. lays out framework based next-generation network infrastructure supporting 3D training planar arrays, low latency massive access, emerging wireless communications standards.