Discrete Frequency Chirp Radar Using Off-The-Shelf BLE Components

A well-established radar technique is based on the analysis of the echo of a linear frequency chirp in order to get spatial information about reflecting objects. This analysis needs specialized modulation and demodulation circuits and hence requires dedicated hardware. Contrary to this, we present a...

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Bibliographic Details
Published in2020 7th International Conference on Control, Decision and Information Technologies (CoDIT) Vol. 1; pp. 645 - 649
Main Authors Maus, Gerrit, Bruckmann, Dieter
Format Conference Proceeding
LanguageEnglish
Published IEEE 29.06.2020
Subjects
BLE
Chirp
Discrete Frequency Chirp
Distance measurement
Radar
Receiving antennas
RSS
Sensors
Wireless communication
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Summary:A well-established radar technique is based on the analysis of the echo of a linear frequency chirp in order to get spatial information about reflecting objects. This analysis needs specialized modulation and demodulation circuits and hence requires dedicated hardware. Contrary to this, we present a coarse radar approach that can be implemented exclusively with low-cost off-the-shelf RF chipsets. The proposed method utilizes the Received Signal Strength of a discrete frequency chirp in order to resolve pairs of reflection components with common Time of Flight differences. The technique is derived in detail and it is shown that these information can be used to approximate absolute reflection depths. The real-world functionality of this low-cost radar approach is demonstrated by an experimental setup. Using standard Bluetooth Low Energy components, we extract the impact of environmental changes under certain reflection depths out of measured field strength data.
ISSN:2576-3555
DOI:10.1109/CoDIT49905.2020.9263940