12.2 Improving the Range of WiFi Backscatter Via a Passive Retro-Reflective Single-Side-Band-Modulating MIMO Array and Non-Absorbing Termination

Miao, Meng; Dunna, Manideep; Yu, Hans C.; Kuo, Shih-Kai; Wang, Po-Han Peter; Bharadia, Dinesh; Mercier, Patrick P.

doi:10.1109/isscc42613.2021.9366014

Cited by 11 publications

(14 citation statements)

References 2 publications

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“…In this section, we will present preliminary results demonstrating the working of the BeamScatter's beam-steering tag and the advantages offered by it compared to the traditional Receiver separations for SyncScatter tag [6], Retro-reflective tag [10] and the proposed BeamScatter tag.…”

Section: Discussionmentioning

confidence: 99%

“…Van-atta based solution: To address the limited range problem, a simple idea used in the prior work [10] is to enable MIMO with van-atta structure [12] to extend the range of a backscatter tag from a WiFi access point to 23m. The idea here is that the backscatter tags are made retro-reflective by placing multiple antennas on them.…”

Section: Background and Motivationmentioning

confidence: 99%

“…The improvement is shown in terms of comparing the possible Tx to Tag and Tag to Rx separations for the BeamScatter's backscatter tag with other backscatter tag implementations. 15 m from both the Tx and Rx WiFi APs and Retro-reflective MIMO [10] implementation has maximum separation of 23m from the co-located AP with Tx and Rx. On the other hand, BeamScatter tag can support upto 28 m separation from either of the APs thus supporting mesh networks with >50m AP to AP separation.…”

Section: Range Improvementmentioning

confidence: 99%

“…To extend the connectivity range, recent work has explored use of MIMO based WiFi backscatter connectivity. Recent work [10] explored the use of van-atta MIMO array [1,12] to increase the range of the WiFi backscatter communications. However, the van-atta MIMO array reflects the signal back to transmitting access point as shown in the Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 5: Comparison of feasible Transmitter to Tag and Tag to Receiver separations for SyncScatter tag[6], Retro-reflective tag[10] and the proposed BeamScatter tag.…”

mentioning

confidence: 99%

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BeamScatter: Scalable, Deployable Long-Range backscatter communication with Beam-Steering

Dunna¹,

Kuo²,

Agarwal³

et al. 2021

Preprint

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WiFi backscatter tags can enable direct connectivity of IoT devices with commodity WiFi hardware at low power. However, most state of the art backscatter tag implementations in this area have limited transmitter to tag range and are not suitable to be deployed in a WiFi mesh network nor take full advantage of today's WiFi networks. In this paper, we present BeamScatter, which can realize a backscatter tag based on MIMO techniques that can work at very long separation of 28m from an access-point and enables their deployment in WiFi mesh networks. BeamScatter presents a novel technique to perform beam-steering on the MIMO tag at a very low power consumption of 88µW and achieve a peak throughput of 1Mbps. Next BeamScatter creates a novel modeling framework to decide the optimal phase setting on the tag to steer the backscattered signal towards a specific direction of interest.

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Section: Discussionmentioning

confidence: 99%

Section: Background and Motivationmentioning

confidence: 99%

Section: Range Improvementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Figure 5: Comparison of feasible Transmitter to Tag and Tag to Receiver separations for SyncScatter tag[6], Retro-reflective tag[10] and the proposed BeamScatter tag.…”

mentioning

confidence: 99%

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BeamScatter: Scalable, Deployable Long-Range backscatter communication with Beam-Steering

Dunna¹,

Kuo²,

Agarwal³

et al. 2021

Preprint

Self Cite

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Spectrally Efficient Backscatter Systems: A Hardware-Oriented Survey

Alhassoun

2023

IEEE Access

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The growing interest in backscatter communications as a low-powered solution in various fields necessitates pushing the envelope of current backscatter systems in multiple frontiers, among which is spectral efficiency. The increase in spectral efficiency can drive real-time applications such as augmented reality. In most of backscatter-system applications such as radio-frequency identification, backscatter modulation is implemented using binary schemes realized with square pulses, which are not spectral efficient. To address the spectral efficiency concern, this article reviews-with a scope limited to prototyped systems-some of the existing works in the literature that pertain to increasing the spectral efficiency of backscatter systems. The prototyped systems can be grouped-based on the implementation technique used-into three groups: High-order modulation, single-sideband modulation, and pulse shaping. Based on the current trends and studied literature, the article concludes with discussions on some future directions and open-ended research problems such as optimal pulse shaping, the use of artificial intelligence, multi-carrier modulation, and agile modulation; which are all aim for overcoming the spectral-efficiency limit of contemporary backscatter systems.

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A 65 nm CMOS Battery-Less RFID Tag Featuring Short Range Communication with Commodity WiFi

Esteban,

Milovanović

2024

2024 39th Conference on Design of Circuits and Integrated Systems (DCIS)

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12.2 Improving the Range of WiFi Backscatter Via a Passive Retro-Reflective Single-Side-Band-Modulating MIMO Array and Non-Absorbing Termination

Cited by 11 publications

References 2 publications

BeamScatter: Scalable, Deployable Long-Range backscatter communication with Beam-Steering

BeamScatter: Scalable, Deployable Long-Range backscatter communication with Beam-Steering

Spectrally Efficient Backscatter Systems: A Hardware-Oriented Survey

A 65 nm CMOS Battery-Less RFID Tag Featuring Short Range Communication with Commodity WiFi

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