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Frequency Error Compensation of Unsynchronized Bistatic CW- MIMO Radar for Multiple Human-Body Localization

This article presents and experimentally evaluates a frequency error elimination technique suitable for unsynchronized bistatic Multiple-Input Multiple-Output (MIMO) radar for human-body detection. First, a mathematical expression of human-body localization using bistatic MIMO radar is presented. Th...

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Published in:IEEE transactions on biomedical circuits and systems 2022-10, Vol.16 (5), p.882-890
Main Authors: Abuduaini, Abudusaimi, Shiraki, Nobuyuki, Honma, Naoki, Nakayama, Takeshi, Iizuka, Shoichi
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cited_by cdi_FETCH-LOGICAL-c372t-763d58b17e6d5c3f3d99b44a798367cf0db3deb6f2ae92637ebd1cb6ebae0cb43
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description This article presents and experimentally evaluates a frequency error elimination technique suitable for unsynchronized bistatic Multiple-Input Multiple-Output (MIMO) radar for human-body detection. First, a mathematical expression of human-body localization using bistatic MIMO radar is presented. Then the direct path is used to eliminate the phase error created by the frequency difference between the transmitter and receiver. A new Doppler-shifted component of the MIMO channel without phase error is derived, and the locations of the multiple targets are calculated by the 2-dimensional MUltiple SIgnal Classification (MUSIC) method. Next, the results of simulations that examine frequency error versus power ratios are discussed to illustrate the effectiveness of the proposed method. An experiment is carried out in an indoor multipath-rich environment. To emulate the unsynchronized condition, the transmitter and receiver use independent Signal Generators (SGs). One to six targets are tested. The experiments demonstrate that our unsynchronized radar system can identify the locations of multiple targets with high accuracy.
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subjects Direction-of-arrival estimation
Error compensation
frequency error
Indoor environments
living-body localization
Localization
Location awareness
MIMO communication
MIMO radar
multiple targets
Multistatic radar
Oscillators
Phase error
Radar
Radar detection
Radar equipment
Receivers
Signal classification
Signal generators
unsynchronized
title Frequency Error Compensation of Unsynchronized Bistatic CW- MIMO Radar for Multiple Human-Body Localization
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