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LoRadar: Enabling Concurrent Radar Sensing and LoRa Communication
- Source :
- IEEE Transactions on Mobile Computing. 21:2045-2057
- Publication Year :
- 2022
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2022.
-
Abstract
- Miniature radar has demonstrated its great potential in smart homes to understand the wellness of the residents and provide ubiquitous interactions. While it has many promising applications, it also results in congested RF (radio frequency) environments as there is an unprecedented amount of traffic in a smart home. To ease the strain on the limited spectrum, we ask the question that, can we reuse the sensing signals for data communication With such a capability, we can improve the spectrum utilization by sharing the spectrum between sensing and communication systems. However, radar signals are customized for the sensing purpose and are incompatible with legacy communication standards. To address this challenge, we have an observation that, non-linearity effect in RF circuits can convert wideband radar signals into a LoRa signal. Based on this observation, in this paper, we present LoRadar, which enables an FMCW (Frequency-Modulated Continuous Wave) radar to carry LoRa signals in sensing waves. We present both the downlink and uplink design, enabling a LoRadar device to communicate with LoRa nodes in a bi-directional way. We implement LoRadar and evaluation results show that LoRadar can achieve home-level coverage with 3:4kbps data rate while it preserves the sensing resolution of the radar.
- Subjects :
- Computer Networks and Communications
Computer science
business.industry
Real-time computing
ComputerApplications_COMPUTERSINOTHERSYSTEMS
Communications system
Signal
law.invention
law
Home automation
Telecommunications link
Chirp
Radio frequency
Electrical and Electronic Engineering
Radar
business
Frequency modulation
Software
Subjects
Details
- ISSN :
- 21619875 and 15361233
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Mobile Computing
- Accession number :
- edsair.doi...........9ba657b0bf100646797857c127255153