The proliferation of loT applications drives the need ubiquitous connections among heterogeneous wireless devices. Cross-Technology Communication (CTC) is a significant technique to directly exchange information devices that follow different standards. By exploiting side-channel like frequency, amplitude or temporal modulation, existing works enable CTC but have limited performance under channel noise. In this paper, we propose WiZig, novel employs modulation techniques in both and...

Federated learning (FL) is a machine technique that allows for on-site data collection and processing without sacrificing privacy transmission. Heterogeneity key challenge in federated settings. Recently, cross-technology communication (CTC) has emerged as solution Internet of Things (IoT) heterogeneity, enabling direct between different wireless devices the need hardware modifications or gateway intervention. For example, sophisticated WiFi device can serve central coordinator other...

Cross- Technology Communication (CTC) is an emerging technique to enable the direct communication among different wireless technologies. A main category of existing proposals on CTC propose modulate packets at sender side, and demodulate them into 1 0 bits receiver side. The performance those likely degrade in a densely coexisting environment. Solely judged according received signal strength, symbol that modulated as packet absence generally indistinguishable from dynamic interference. In...

Cross-technology communication (CTC) is a technique that enables direct among different wireless technologies. Recent works in this area have made positive progress, but high-throughput CTC from ZigBee to WiFi remains an open problem. In paper, we propose ZigFi, novel framework WiFi. Without impacting the ongoing transmissions, ZigFi carefully overlaps packets with packets. Through experiments show Channel State Information (CSI) of overlapped can be used convey data Based on finding,...

Backscatter communication holds potential for ubiquitous and low-cost connectivity among low-power IoT devices. To avoid interference between the carrier signal backscatter signal, recent works propose a frequency-shifting technique to separate these two signals in frequency domain. Such proposals, however, have occupy precious wireless spectrum that is already overcrowded, increase power, cost, complexity of tag. In this paper, we revisit classic ON-OFF Keying (OOK) modulation Aloba, system...

Cross-Technology Communication (CTC) is an emerging technique that enables direct communication across different wireless technologies. Recent works achieve physical-level CTC by emulating the standard time-domain waveform of receiver. This method faces challenges inherent unreliability due to imperfect emulation. Different from analog emulation, we propose a novel concept named digital which stems following insight: The receiver relies on phase shift decode symbols rather than shape...

Background. Converging evidence has revealed both functional and structural abnormalities in adolescents with early-onset conduct disorder (EO-CD). The neurological underlying EO-CD may be different from that of adolescent-onset (AO-CD) patients. However, the cortical structure AO-CD patients remains largely unknown. aim present study was to investigate alterations Method. We investigated T1-weighted brain images age-, gender- intelligence quotient-matched controls. Cortical structures...

Cross-technology communication (CTC) is a technique that enables direct among different wireless technologies. Recent works in this area have made substantial progress, but CTC from ZigBee to WiFi remains an open problem. In paper, we propose ZigFi, novel framework WiFi. ZigFi carefully overlaps packets with packets. Through experiments show Channel State Information (CSI) of the overlapped can be used convey data Based on finding, receiver-initiated protocol and translate decoding problem...

Backscatter is an enabling technology for battery-free sensing in today's Artificial Intelligence of Things (AIOT). Building a backscatter-based system, however, daunting task, due to two obstacles: the unaffordable power consumption microprocessor and coexistence with ambient carrier's traffic. In order address above issues, this paper, we present Leggiero, first-of-its-kind analog WiFi backscatter payload transparency. Leveraging specially designed circuit varactor diode, design avoids...

The elderly over 65 accounts for 80% of COVID deaths in the United States. In response to pandemic, federal, state governments, and commercial insurers are promoting video visits, through which can access specialists at home Internet, without risk exposure. However, current visit practice barely relies on observation talking. specialist could not assess patient's health conditions by performing auscultations.

Cross-Technology Communication (CTC) is an emerging technique that enables direct communication across different wireless technologies. The state-of-the-art works in this area propose physical-level CTC, which the transmitters emulate signals follow receiver's standard. Physical-level CTC means considerable processing complexity at transmitter, doesn't apply to from a low-end transmitter high-end receiver, e.g. ZigBee WiFi. This paper presents transmitter-transparent cross-technology...

Wireless sensing has great significance in Internet of Things (IoT) applications and attracted substantial research interests academia. In this study, we propose Palantir, a first-of-its-kind long-range system based on the LoRa backscatter technology. By utilizing ON-OFF-Keying modulated signals, Palantir can perform fine-grained cyclist sensing. Our findings show that is more susceptible to channel quality than communication. Hence, design particularly addresses critical challenges signal...

Backscatter communication holds potential for ubiquitous and low-cost connectivity among low-power IoT devices. To avoid interference between the carrier signal backscatter signal, recent works propose a frequency-shifting technique to separate these two signals in frequency domain. Such proposals, however, have occupy precious wireless spectrum that is already overcrowded, increase power, cost, complexity of tag. In this paper, we revisit classic ON-OFF Keying (OOK) modulation Aloba, system...

Symmetric key generation based on biometrics has emerged as a promising solution for wearables pairing. Among various biometrics, heartbeats offer significant potential owing to their inherent randomness and spontaneity. Ballistocardiography (BCG), in particular, stands out its accessibility inclusivity, it measures the body's recoil forces response cardiac blood ejection into vasculature. However, traditional approaches BCG suffer from challenges sensing limited rates. To this end, paper...

WiFi-based device localization is a key technology for smart applications, while most of which rely on LoS signals to work. However, in real-world indoor environments, very few are usable accurate localization. This paper presents Bifrost , novel hardware-software co-design cope with this practical problem. The core idea reinvent WiFi provide sufficient signals. Specifically, we present low-cost plug-in design leaky wave antenna (LWA) that can generate orthogonal polarized signals: On one...

This paper presents RF-Transformer, a unified backscatter radio hardware abstraction that allows low-power IoT device to directly communicate with heterogeneous wireless receivers at the minimum power consumption. Unlike existing systems are tailored specific communication protocol, RF-Transformer provides programmable interface micro-controller, allowing devices synthesize different types of protocol-compliant signals sharing radically PHY-layer designs. To show efficacy our design, we...

We present MAF, a novel acoustic sensing approach that leverages the commodity hardware in bone conduction earphones for hand-to-face gesture interactions. Briefly, by shining audio signals with earphones, we observe these not only propagate along surface of human face but also dissipate into air, creating an field envelops individual's head. conduct benchmark studies to understand how various gestures and factors influence this field. Building on insights gained from initial studies, then...

The proliferation of IoT applications brings the demand ubiquitous connections among heterogeneous wireless devices. Cross-Technology Communication (CTC) is a significant technique to directly exchange data devices that follow different standards. By exploiting side-channel like frequency, amplitude, or temporal modulation, existing works enable CTC but have limited performance under channel noise. In this article, we propose WiZig, novel from WiFi ZigBee employs modulations in both...

Clock synchronization is a key function in embedded wireless systems and networks. This issue equally important more challenging IoT nowadays, which often include heterogeneous devices that follow different standards. Conventional solutions to this problem employ gateway-based indirect synchronization, suffer low accuracy. paper for the first time studies of cross-technology clock synchronization. Our proposal called Crocs synchronizes WiFi ZigBee by direct communication. decouples signal...

This paper proposes Meta-Speaker, an innovative speaker capable of projecting audible sources into the air with a high level manipulability. Unlike traditional speakers that emit sound waves in all directions, Meta-Speaker can manipulate granularity region, down to single point, and location source. Additionally, source projected by is physical presence space, allowing both humans machines perceive it spatial awareness. achieves this leveraging fact nonlinear medium, which enables...