Wireless Communication and Mobile Computing

In this paper we report on a magnetoquasistatic orientation sensor that uses the magnetoquasistatic coupling between an electrically small emitting loop (magnetic dipole) and seven vertical receiving loops located on a circle of radius 12.19 m to determine the orientation of an object.

In this paper, we present measurements using the magnetoquasistatic technique to show that the presence of a large group of 25 people introduces a peak distance error of less than 4.5 cm for an emitter-receiver distance of 10 m.

Measurements of the emitted magnetoquasistatic fields generated by a vertical emitting loop and detected at the terminals of seven fixed vertical receiving loops, all located above earth, are used to solve for position and orientation of the emitter.

We implement CAESAR on commodity hardware and conduct extensive experiments both in controlled network conditions and dynamic radio environments.

In this work we examine a software module that helps network operators to prevent third parties from aggregating wireless base station identifiers by making the identifiers dynamic.

In ad hoc networks without static nodes that could be used as reference points, mobile handhelds must rely on their GPS receivers to enable location-aware services.

This paper describes and evaluates the feasibility of a WLAN system operating in paired spectrum with a proof of concept implementation.

We investigate a contention-based 802.11-like protocol for paired spectrum.

This project seeks to increase the power delivered to passive backscatter RF tags using transmit diversity – a method that uses multiple antennas and channel knowledge to deliver power to the tag.

We have demonstrated an increase in the power incident on the RF tag using transmit diversity in a monostatic backscatter channel.