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Indoor localization is crucial to enable context-aware applications, but existing solutions mostly require a user to carry a device, so as to actively sense location-discriminating signals. However, many applications do not prefer user involvement due to,...

Connected vehicles leverage wireless interfaces to broadcast their motion state information for improved traffic safety and efficiency. It is crucial for their motion claims (location and velocity) to be verified at the receivers to detect spoofing ...

Voice assistants such as Amazon Echo (Alexa) and Google Home use microphone arrays to estimate the angle of arrival (AoA) of the human voice. This paper focuses on adding user localization as a new capability to voice assistants. For any voice command, ...

In this paper, we investigate two schemes of a joint detection and signal wavefront estimation for noncoherent signals. Both the developed schemes are based on the GLR (Generalized Likelihood Ratio) method. The first scheme does not exploit assumptions ...

In this paper, we are interested in estimating the angle of arrival (AoA) of all the signal paths arriving at a receiver array using only the corresponding received signal magnitude measurements (or, equivalently, the received power measurements). ...

In underwater wireless optical communications (UWOC), the photons captured by the detector have different angle-of-arrival (AOA) due to the scattering effect especially in turbid seawater. Thus the received photons suffer angle spread which follows a ...

Device-free passive indoor localization is playing a critical role in many applications such as elderly care, intrusion detection, smart home, etc. However, existing device-free localization systems either suffer from labor-intensive offline training or ...

Based on the indoor wideband multiple‐input multiple‐output (MIMO) device‐to‐device (D2D) measurements at 5 GHz with 100 MHz bandwidth carried out in University of Oulu, Finland, this study investigates the characteristics of indoor D2D radio channels ...

We present the high-level design of WiDraw, the first 3D hand motion tracking system using COTS WiFi cards, proposed in [3]. WiDraw can track hand gestures without a priori learning or requiring the user to hold any hardware. It can be implemented on ...

This paper demonstrates that it is possible to leverage WiFi signals from commodity mobile devices to enable hands-free drawing in the air. While prior solutions require the user to hold a wireless transmitter, or require custom wireless hardware, or ...

We explore the indoor positioning problem with unmodified smartphones and slightly-modified commercial LED luminaires. The luminaires - modified to allow rapid, on-off keying - transmit their identifiers and/or locations encoded in human-imperceptible ...

Signal processing on antenna arrays has received much recent attention in the mobile and wireless networking research communities, with array signal processing approaches addressing the problems of human movement detection, indoor mobile device ...

We explore the indoor positioning problem with unmodified smartphones and slightly-modified commercial LED luminaires. The luminaires-modified to allow rapid, on-off keying-transmit their identifiers and/or locations encoded in human-imperceptible ...

One of the fundamental research areas in wireless communications is the development of realistic models that can efficiently and accurately describe the wireless propagation channel. In this paper, the authors developed an asymmetric geometrical‐based ...