Direct Digital RF Technology-Challenges for beyond Nyquist Frequency Range

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Since the maximum operational frequency of digital RF based on A/D and D/A is Nyquist frequency, it has been difficult to apply digital RF concept to higher microwave frequency range. In this paper, direct digital RF technology is introduced to break this Nyquist limit. This technology utilizes the higher-order Nyquist Zones (beyond the Nyquist frequency range) and higher microwave frequency signal can be handled directly. Higher order direct RF undersampling architecture is introduced for receiver and a fabricated results of 28GHz-band receiver using 1GHz sampling clock will be shown. A 1-bit bandpass\mathbf\Delta\mathbf\Sigma modulator is introduced for transmitter which generates a 26GHz-band RF signal directly from 8Gbps 1-bit digital stream. In order to enhance the image signal level and SNR, RZ signaling and Manchester coding techniques are examined. This direct digital RF technology brings really digital rich microwave/MMW transceivers in future CMOS era.

Original languageEnglish
Title of host publication2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538659717
DOIs
Publication statusPublished - 2018 Nov 5
Event2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018 - Melbourne, Australia
Duration: 2018 Aug 152018 Aug 17

Publication series

Name2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018

Other

Other2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018
Country/TerritoryAustralia
CityMelbourne
Period18/8/1518/8/17

Keywords

  • ADC
  • CMOS
  • DAC
  • Digital RF
  • Microwaves
  • RFIC
  • Transceivers
  • sub-sampling
  • under-Sampling

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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