Beam Squint Reduction by Combining Phased Subarrays With True Time Delays in Baseband

Research output: Contribution to journalLetterContributedpeer-review

Contributors

Abstract

The phenomenon of beam squinting is one of the challenges for wideband mobile communications systems. Although purely digital arrays could resolve this problem utilizing true-time delays (TTDs), they are too expensive w.r.t. power consumption and hardware complexity. Instead, in this letter, we propose a novel codebook-based hardware efficient beamforming architecture that combines subarrays using phase shifters at radio-frequency (RF) with only a few TTDs realized digitally in baseband. The proposed architecture is capable of counteracting the beam squint induced performance loss more strongly with an increasing number of subarrays. Thus, it can approximate the narrowband assumption with different degrees of accuracy and provides an efficient trade-off between complexity and performance.

Details

Original languageEnglish
Pages (from-to)1159-1163
Number of pages5
JournalIEEE Wireless Communications Letters
Volume14
Issue number4
Publication statusPublished - 30 Jan 2025
Peer-reviewedYes

External IDs

Scopus 105002488585
ORCID /0000-0002-1680-6581/work/194258072

Keywords

Keywords

  • Beam squint, true-time delay, wideband communication