3 research outputs found
Low power LVDS transceiver for AER links with burst mode operation capability
This paper presents the design and simulation of
an LVDS transceiver intended to be used in serial AER links.
Traditional implementations of LVDS serial interfaces require a
continuous data flow between the transmitter and the receiver
to keep the synchronization. However, the serial AER-LVDS
interface proposed in [2] operates in a burst mode, having long
times of silence without data transmission. This can be used
to reduce the power consumption by switching off the LVDS
circuitry during the pauses. Moreover, a fast recovery time after
pauses must be achieved to not slow down the interface operation.
The transceiver was designed in a 90 nm technology. Extensive
simulations have been performed demonstrating a 1 Gbps data
rate operation for all corners in post-layout simulations. Driver
and receiver take up an area of 100x215 m2 and 100x140 m2
respectively.Unión Europea 216777 (NABAB)Ministerio de Ciencia y Tecnología TEC2006-11730-C03-01 (SAMANTA II)Junta de Andalucía P06-TIC-0141
Autocalibrating vision guided navigation of unmanned air vehicles via tactical monocular cameras in GPS denied environments
This thesis presents a novel robotic navigation strategy by using a conventional tactical monocular camera, proving the feasibility of using a monocular camera as the sole proximity sensing, object avoidance, mapping, and path-planning mechanism to fly and navigate small to medium scale unmanned rotary-wing aircraft in an autonomous manner. The range measurement strategy is scalable, self-calibrating, indoor-outdoor capable, and has been biologically inspired by the key adaptive mechanisms for depth perception and pattern recognition found in humans and intelligent animals (particularly bats), designed to assume operations in previously unknown, GPS-denied environments. It proposes novel electronics, aircraft, aircraft systems, systems, and procedures and algorithms that come together to form airborne systems which measure absolute ranges from a monocular camera via passive photometry, mimicking that of a human-pilot like judgement. The research is intended to bridge the gap between practical GPS coverage and precision localization and mapping problem in a small aircraft. In the context of this study, several robotic platforms, airborne and ground alike, have been developed, some of which have been integrated in real-life field trials, for experimental validation. Albeit the emphasis on miniature robotic aircraft this research has been tested and found compatible with tactical vests and helmets, and it can be used to augment the reliability of many other types of proximity sensors