In the last decade, bandwidth expansion and MIMO spatial multiplexing have promised to increase data throughput by orders of magnitude. However, we are yet enjoy such improvement in real-world environments, as they lack rich scattering preclude effective multiplexing. this paper, present ScatterMIMO, which uses smart surface environment, provide gain. Specifically, pairs up with a wireless transmitter device say an active AP re-radiates same amount power any access point (AP), thereby...

This article presents the first integrated circuit designed to enable low-power backscatter communication with commodity Wi-Fi transceivers. The developed chip operates by receiving a series of packets generated from access point (AP), which feeds into energy-detecting wakeup receiver that determines when should commence. Then, AP sends an additional packet is intended be modulated. To accomplish this, antenna incident terminated dynamically varying collection complex impedances via...

Many envisioned IoT applications are not realizable today due to the mW-level power burden of wireless communication circuits for most popular consumer standards: WiFi and BLE. To help enable new applications, backscatter techniques have been shown a ∼1, 000× reduction in consumption over conventional transceivers while maintaining standard compatibility [1]–[3]. However, pragmatic deployment is currently hindered by their limited range, lack IC implementations BLE [4]–[5]. For example, [3]...

Recent work in backscatter modulation has enabled very low-power communication between an loT tag and commodity hardware such as WiFi or BLE transceivers [1]–[4], enabling a new set of exciting applications on-body sensors asset trackers that demand low power deployment cost via compatibility with existing standards. However, approaches tend to require two external devices: transmitting tone generator [3], [5] access point (AP) [1], [2], [4] receiving AP [1]–[5] order perform tone-to-WiFi...

In medical applications, sensing forces along surgical tools is of high importance in order to avoid collateral damage tissue and surrounding structures. However, the space available their central lumen limits routing wired sensors that are widely today, thus integration into such tools. this paper, we present a new wireless force sensor based on wave backscattering reflects electromagnetic waves with phase changes directly related applied magnitude location. The proposed can sense...

Wi-Fi is the most ubiquitous wireless networking technology for IoT in homes, offices, and businesses. Since power of transceivers (10s-to-100s mW) can be prohibitively high emerging classes devices (which desire <; 100μW), recent work has suggested piggybacking baseband signals from device directly on top incident generated by access points (APs) via Wi-Fi-compatible backscatter modulation [1-4], where as low 28μW active been demonstrated [4]. However, major limitation this approach range:...

This paper presents a backscattering chip that is powered via LTE signals, and reflects an incident reverse-whitened Bluetooth Low Energy (BLE) tone-like advertisement packet into re-radiated single-side-band (SSB) 802.11b WiFi at configurable channel location, all towards enabling RFID-like single-device interrogation system. The includes RF energy harvester, wake-up receiver, intermediate frequency (IF) ring oscillator whose calibrated with successive-approximation-register (SAR)...

With the turn of new decade, wireless communications face a major challenge on connecting many more users and devices, at same time being energy efficient minimizing its carbon footprint. However, current approaches to address growing number spectrum demands, like Massive MIMO, demand exorbitant consumption. The reason is that traditionally MIMO requires digital beamforming architecture needs separate RF chain per antenna, so power consumption scales with antennas. Instead, GreenMO creates...

This article presents an integrated circuit (IC) designed to enable low-power long-range backscatter communication with commodity Wi-Fi transceivers. The proposed chip endeavors improve the most critical and difficult specification in systems: range. It does so through two techniques: 1) a fully-reflective single-antenna solution, whereby termination of power combiner always has reflection coefficient near 1 ensure high reflected while enabling single-sideband (SSB) quadrature phase shift...

Millimeter wave (mmWave) sensing has recently gained attention for its robustness in challenging environments. When visual sensors such as cameras fail to perform, mmWave radars can be used provide reliable performance. However, the poor scattering performance and lack of texture millimeter waves make it difficult identify objects some situations precisely. In this paper, we take insight from camera fiducials which are very easily identifiable by a camera, present R-fiducial tags, smartly...

This article introduces a dual-mode backscatter integrated circuit that supports both WiFi and Bluetooth Low Energy (BLE) transmissions. It enables multi-antenna mode with reconfigurable beam steering of single-sideband (SSB) quadrature phase shift-keying (QPSK) signals, while also facilitating omnidirectional SSB BLE-to-BLE communication. To achieve steering, two techniques are proposed: 1) transmission-line-less fully-reflective SP4T switch is employed to minimize power loss maximize the...

All interactions of objects, humans, and machines with the physical world are via contact forces. For instance, objects placed on a table exert their gravitational forces, our hands/feet guided by sense force felt skin. Thus, ability to forces can allow us measure all these ubiquitous interactions, enabling myriad applications. Furthermore, sensors critical requirement for safer surgeries, which require measuring complex experienced as surgical instrument interacts surrounding tissues during...

Millimeter wave sensing has recently attracted a lot of attention given its environmental robust nature. In situations where visual sensors like cameras fail to perform, mmwave radars can be used achieve reliable performance. However, because the poor scattering performance and lack texture in millimeter waves, not several that require precise identification objects. this paper, we take insight from camera fiducials which are very easily identifiable by camera, present R-fiducial tags,...

WiFi backscatter tags can enable direct connectivity of IoT devices with commodity hardware at low power. However, most state the art tag implementations in this area have limited transmitter to range, are not suitable be deployed a mesh network, and do take full advantage today's network capabilities such as MIMO. In paper, we present BeamScatter, which realize based on MIMO techniques that work very long separation 28m from an access-point enables their deployment networks. BeamScatter...

Contact force is a natural way for humans to interact with the physical world around us. However, most of our interactions digital are largely based on simple binary sense touch (contact or no contact). Similarly, when interacting robots perform complex tasks, such as surgery, richer information that includes both magnitude and contact location important task performance. To address these challenges, we present design fabrication WiForce which 'wireless' sensor, sentient location. achieves...

Millimeter wave sensing has rapidly gained prominence with the advent of Frequency Modulated Continuous Wave (FMCW) radars, redefining applications in both indoor and outdoor domains. An emerging focus this field revolves around developing intelligent infrastructure tags, which serve as fiducials for these enabling easy accurate identification. Leveraging specialized antenna architecture modulation techniques, tags enhance detectability identification performance. Moreover, system allows...

With the turn of new decade, wireless communications face a major challenge on connecting many more users and devices, at same time being energy efficient minimizing its carbon footprint. However, current approaches to address growing number spectrum demands, like traditional fully digital architectures for Massive MIMO, demand exorbitant consumption. The reason is that traditionally MIMO requires separate RF chain per antenna, so power consumption scales with antennas, instead users, hence...