Evaluation of effects of multipath and co-channel interference on time reversal multiple-input/multiple-output in underwater acoustic channel. (4th June 2018)

• Record Type: Journal Article
• Authors: Kida, Yukihiro; Deguchi, Mitsuyasu; Shimura, Takuya
• Is Part Of: Japanese journal of applied physics. Volume 57:Number 7(2018)Supplement 1
• Publication Date: 2018-06-04
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.57.07LG01
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: The relationship between the performance of time-reversal-based multiple-input/multiple-output (MIMO) communication technique and the changes in the multipath environment is investigated quantitatively. In this study, the performance of adaptive time reversal (ATR)-MIMO is investigated by a parametric study approach. The ATR-MIMO communication technique is applied to the multipath-rich synthetic shallow sea acoustic dataset. We focused on discussing about the relationship among the changes in the multipath environment, the number of transmissions, the capability of ATR-MIMO to remove cochannel interference (CCI), and the efficiency of utilization of the energy of the multipath. The results reveal which characteristic of an acousticwavefield affects the performance of ATR-MIMO and how the performance saturates when the multipath environment changes. It is also demonstrated that ATR-MIMO can utilize the energy of the multipath as effectively as the passive-time-reversal-based single-input/multiple-output communication technique in a Gaussian-noise-dominant environment.