True-Time-Delay Receiver IC With Reconfigurable Analog and Digital Beamforming

Kalle Spoof, Miikka Tenhunen, Vishnu Unnikrishnan, Kari Stadius, Marko Kosunen, Jussi Ryynänen

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
163 Downloads (Pure)

Abstract

Spatial diversity advantages such as improved signal-to-noise ratio and in-band blocker filtering can be achieved through beamforming in the digital and/or analog domain. Digital beamforming benefits from the precision and efficient parallelization of digital signal processing. On the other hand, analog beamforming allows the filtering of in-band but out-of-beam blockers before the ADC which can improve the dynamic range performance of the receiver. A delay method based on resampling has recently emerged as a viable solution for enabling true-time-delay analog beamforming receivers, which overcome the fractional bandwidth limitation of phase-shift beamforming due to beam squint. This paper presents a 22-nm CMOS receiver prototype that enables reconfiguration between true-time-delay analog and digital beamforming to allow choosing the more suitable operation mode in different signal environments. The reconfigurability is achieved by exploiting the time-interleaved nature of both the resampling delay setup and high speed ADCs. In addition to the beamforming mode reconfigurability, the receiver achieves state-of-the-art 2 GHz instantaneous beamformed bandwidth in the analog mode. The receiver reaches a 100% fractional bandwidth at the low end of the 1–6 GHz frequency range.
Original languageEnglish
Pages (from-to)116375 - 116383
Number of pages9
JournalIEEE Access
Volume10
DOIs
Publication statusPublished - 4 Nov 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Analog beamforming
  • beam squint
  • CMOS
  • digital beamforming
  • integrated circuit
  • phased array
  • radio receiver
  • spatial filtering
  • true-time-delay

Fingerprint

Dive into the research topics of 'True-Time-Delay Receiver IC With Reconfigurable Analog and Digital Beamforming'. Together they form a unique fingerprint.
  • RF Sampo: Kumppanuusmalli – RF Sampo

    Ryynänen, J. (Principal investigator), Jokiniemi, K. (Project Member), Naghavi, S. (Project Member), Stadius, K. (Project Member), Lahtinen, V. (Project Member), Cheung, T. (Project Member), Ryynänen, K. (Project Member), Ghosh, A. (Project Member), Boopathy, D. (Project Member) & Leelarathne, G. (Project Member)

    01/11/202131/08/2024

    Project: Business Finland: Strategic centres for science, technology and innovation (SHOK)

Cite this