Ultra-wideband (UWB) Echo Synthesis Using Frequency Diverse MIMO Sonar

Xionghou Liu, Chao Sun, Yixin Yang, Guangyu Jiang, Kuan Fan

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

1 Scopus citations

Abstract

The ultra-wideband (UWB) signal can improve the range resolution of an imaging sonar greatly. However, the imaging sonar can hardly emit the UWB pulse due to the limitation on the instantaneous system bandwidth. In this paper, by using the frequency diverse multiple-input multiple-output (FD-MIMO) sonar, we propose a UWB echo synthesis method as an alternative. We use a group of FD linear frequency modulation (FD-LFM) pulses with relatively small bandwidths as transmitting waveforms. To suppress the cross-correlation function (CCF) interferences, we use the multi-ping illumination to enlarge the frequency band gap between the FD-LFM pulses emitted in a ping. Moreover, the amplitude errors and the phase errors in a ping (out of the transmission synchronization errors on the transmitting array of the MIMO sonar) and between different pings (caused by the range misalignment due to the multi-ping illumination) are considered, and the corresponding impacts on the synthesized UWB result are analyzed. Numerical simulations show that the proposed method can synthesize a high-resolution range profile similar to that produced by a single UWB pulse, by using a small instantaneous system bandwidth.

Original languageEnglish
Title of host publicationOCEANS 2018 MTS/IEEE Charleston, OCEAN 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538648148
DOIs
StatePublished - 7 Jan 2019
EventOCEANS 2018 MTS/IEEE Charleston, OCEANS 2018 - Charleston, United States
Duration: 22 Oct 201825 Oct 2018

Publication series

NameOCEANS 2018 MTS/IEEE Charleston, OCEAN 2018

Conference

ConferenceOCEANS 2018 MTS/IEEE Charleston, OCEANS 2018
Country/TerritoryUnited States
CityCharleston
Period22/10/1825/10/18

Keywords

  • Band synthesis
  • Multiple-input multiple-output (MIMO) sonar
  • Sonar imaging
  • Ultra-wideband (UWB)
  • Underwater acoustics

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