Pre-Calibration Techniques for Transmitter-Side RF Imbalance and Spectrum Distortion

Juinn Horng Deng, Pavan Vatal Shankar Prasad, Wei Cheng Huang, Meng Lin Ku

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

1 Scopus citations

Abstract

In this paper, we study the cascaded pre-calibration techniques to overcome the coexisting problems of RF IQ imbalance (IQI) and RF spectrum distortion, which can improve the performance of a single package mmWave IC. The calibration techniques are designed separately. We first pre-compensate the IQI effect by using a single-tone signal with a blind algorithm to estimate the impairment parameters and calculate the precalibration weighting coefficients. After that, we adopt quadrature wideband training sequences to estimate the RF distorted responses and calculate the pre-calibration filters via the deconvolution techniques. The above calibration schemes are realized in the digital pre-processing domain and can perform better than the conventional RF calibration circuit design. Both the computer simulation results and the mmWave software defined radio (SDR) platform measurement results confirm that the proposed techniques can pre-calibrate the cascaded RF IQI and RF spectrum distortion problems.

Original languageEnglish
Title of host publication2022 IEEE 95th Vehicular Technology Conference - Spring, VTC 2022-Spring - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665482431
DOIs
StatePublished - 2022
Event95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring - Helsinki, Finland
Duration: 19 Jun 202222 Jun 2022

Publication series

NameIEEE Vehicular Technology Conference
Volume2022-June
ISSN (Print)1550-2252

Conference

Conference95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring
Country/TerritoryFinland
CityHelsinki
Period19/06/2222/06/22

Keywords

  • blind algorithm
  • deconvolution technique
  • digital pre-calibration
  • mmWave software defined radio platform
  • RF IQ imbalances
  • RF spectrum distortion
  • Separated calibration procedures

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