System Development and Experimental Validation of a Long Range VNA-Based Channel Sounder

Allan Wainaina Mbugua, Wei Fan*, Xuesong Cai, Yun Chen, Wei Wang, Kim Olesen, Gert Frølund Pedersen

*Corresponding author

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

In a wireless communication system, the radio propagation channel is a complicated component to characterize. Channel sounding
equipment thus has to meet specific criteria to extract the desired channel parameters. In this paper, we outline the development
and validation of a vector network analyzer (VNA) based channel sounder for the frequency range from 1 GHz to 50 GHz using
radio-over-fiber (RoF) techniques. Three methods of de-embedding phase errors due to hardware impairments are demonstrated
and validated via back-to-back measurements. The bidirectional scheme utilizing optical circulators is shown to have a superior
performance over the two-branch unidirectional and the two-branch bidirectional schemes. Therefore, the bidirectional scheme
utilizing optical circulators is proposed to achieve a long range ultra channel sounder based on the VNA.
Original languageEnglish
JournalIET Microwaves, Antennas & Propagation
ISSN1751-8725
DOIs
Publication statusPublished - 26 May 2020

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