26 GHz-band direct digital signal generation by a manchester coding 1-bit band-pass delta-sigma modulator using it's 7th nyquist zone

Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

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

6 Citations (Scopus)

Abstract

In this paper, we propose a direct digital RF transmitter using a I-bit band-pass delta-sigma modulator for micro-wave/millimeter-wave applications. This transmitter directly generates a RF signal from the lower rate 1-bit stream by utilizing it's higher order Nyquist zone. We made signal power and SNR comparisons between three types of 1-blt DAC signals; non-return-to-zero (NRZ), 50% duty return-to-zero (RZ) and Manchester coding. By using 1Vp-p/8 Gbps DAC output, Manchester coding shows the highest output signal power of-20.3 dBm and SNR of more than 40 dB in the 7th Nyquist zone (around 26 GHz). Based on this study, we have tried to adopt this technique to generate a 26 GHz-band 5 Mbps QPSK modulated signal and have confirmed that an EVM of 2.4% can be obtained in the 7th Nyquist zone.

Original languageEnglish
Title of host publication2018 11th Global Symposium on Millimeter Waves, GSMM 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538645840
DOIs
Publication statusPublished - 2018 Aug 17
Event11th Global Symposium on Millimeter Waves, GSMM 2018 - Boulder, United States
Duration: 2018 May 222018 May 24

Publication series

Name2018 11th Global Symposium on Millimeter Waves, GSMM 2018

Other

Other11th Global Symposium on Millimeter Waves, GSMM 2018
Country/TerritoryUnited States
CityBoulder
Period18/5/2218/5/24

Keywords

  • 1-blt
  • Delta-sigma
  • Digital to analog converter
  • Direct digital to RF
  • Image
  • Microwaves
  • Transmitters

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Instrumentation

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