A filter design method of direct rf undersampling on-board receiver for ka-band HTS

Tomoyuki Furuichi, Yang Gui, Mizuki Motoyoshi, Suguru Kameda, Takashi Shiba, Noriharu Suematsu

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we propose a radio frequency (RF) anti-aliasing filter design method considering the effect of a roll-off characteristic on a noise figure (NF) in the direct RF undersampling receiver. The proposed method is useful for broadband reception that a system bandwidth (BW) has nearly half of the sampling frequency (1/2 fs). When the system BW is extended nearly 1/2 fs, the roll-off band is out of the desired Nyquist zone and it affects NF additionally. The proposed method offers a design target regarding the roll-off characteristic not only the rejection ratio. The target is helpful as a design guide to meet the allowed NF. We design the filter based on the proposed method and it is applied to the direct RF undersampling on-board receiver for Ka-band high throughput satellite (HTS). The measured NF value of the implemented receiver almost matched the designed value. Moreover, the receiver achieved the reception bandwidth which is 90% of 1/2 fs.

Original languageEnglish
Pages (from-to)1078-1085
Number of pages8
JournalIEICE Transactions on Communications
VolumeE103B
Issue number10
DOIs
Publication statusPublished - 2020 Oct 1

Keywords

  • Broadband
  • Direct RF
  • Filter design
  • High throughput satellite
  • Receiver
  • Undersampling

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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