Novel Baseband Analog Beamforming through Resistive DACs and Sigma Delta Modulators

S. Ringeling, L. Steinebach, Q. Liu, C. Zhang, S. Bajoria, M. Bolatkale, L. Breems, G. Radulov

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

This paper reports a novel beamforming method based on Continuous Time Sigma-Delta Modulators (CT SDM) with feedforward (FF) programmable coefficients implemented as spatial FIR filters. This new method realizes analog beamforming in baseband and allows accurate beamsteering by programming banks of resistors. We present the theoretical framework and a proof-of-concept implementation as a spatio-temporal 250MHz signal bandwidth CT SDM in 40nm CMOS for a 9-channels phased array. This paper shows that the proposed method can significantly lower the ADC SNR requirements in phased-array receivers operating in the presence of multiple interferers inside the signal frequency band. Our method can enable power-efficient hybrid multi-link beam-forming when combined with the standard digital beamforming approaches.

Original languageEnglish
Title of host publicationECCTD 2020 - 24th IEEE European Conference on Circuit Theory and Design
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Electronic)9781728171838
DOIs
Publication statusPublished - Sep 2020
Event24th IEEE European Conference on Circuit Theory and Design, ECCTD 2020 - Sofia, Bulgaria
Duration: 7 Sep 202010 Sep 2020

Conference

Conference24th IEEE European Conference on Circuit Theory and Design, ECCTD 2020
CountryBulgaria
CitySofia
Period7/09/2010/09/20

Keywords

  • 5G
  • Beamforming
  • Phased-array
  • Sigma-Delta

Fingerprint Dive into the research topics of 'Novel Baseband Analog Beamforming through Resistive DACs and Sigma Delta Modulators'. Together they form a unique fingerprint.

Cite this