Wideband N-Beam Arrays using Low-Complexity Algorithms and Mixed-Signal Integrated Circuits

Sirani M. Perera, Viduneth Ariyarathna, Nilan Udayanga, Arjuna Madanayake, Ge Wu, Leonid Belostotski, Yingying Wang, Soumyajit Mandal, Renato J. Cintra, Theodore Rappaport

Research output: Contribution to journalArticle

Abstract

This paper proposes a low-complexity wideband beamforming subarray for millimeter wave (mmW) 5G wireless communications. The multi-beam subarray is based on using a novel delay Vandermonde matrix (DVM) algorithm to efficiently generate analog true-time-delay (TTD) beams that have no beam squint. A factorization for the DVM leading to low-complexity analog realizations is provided and complexity analysis for real and complex inputs is derived. The DVM is a special case of the Vandermonde matrix but with complex nodes that lack any special properties (unlike the discrete Fourier transform (DFT) matrix). Error bounds for the DVM are established and then analyzed for numerical stability. Mixed-signal CMOS integrated circuits designs are proposed for the implementation of DVM multi-beam algorithms along with low-complexity digital realizations to achieve hybrid beamforming for mmW applications. Analog-digital hybrid mmW multi-beam beamforming circuits and systems are designed for an example with 8-beams at 28 GHz and simulated in Cadence for functional verification.

Original languageEnglish (US)
JournalIEEE Journal on Selected Topics in Signal Processing
DOIs
StateAccepted/In press - Apr 7 2018

Fingerprint

Beamforming
Millimeter waves
CMOS integrated circuits
Convergence of numerical methods
Mixed signal integrated circuits
Factorization
Discrete Fourier transforms
Time delay
Networks (circuits)
Communication

Keywords

  • 5G multi-beam arrays
  • Delay Vandermonde matrix
  • low-complexity algorithm
  • wideband beamforming

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Wideband N-Beam Arrays using Low-Complexity Algorithms and Mixed-Signal Integrated Circuits. / Perera, Sirani M.; Ariyarathna, Viduneth; Udayanga, Nilan; Madanayake, Arjuna; Wu, Ge; Belostotski, Leonid; Wang, Yingying; Mandal, Soumyajit; Cintra, Renato J.; Rappaport, Theodore.

In: IEEE Journal on Selected Topics in Signal Processing, 07.04.2018.

Research output: Contribution to journalArticle

Perera, Sirani M. ; Ariyarathna, Viduneth ; Udayanga, Nilan ; Madanayake, Arjuna ; Wu, Ge ; Belostotski, Leonid ; Wang, Yingying ; Mandal, Soumyajit ; Cintra, Renato J. ; Rappaport, Theodore. / Wideband N-Beam Arrays using Low-Complexity Algorithms and Mixed-Signal Integrated Circuits. In: IEEE Journal on Selected Topics in Signal Processing. 2018.
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