Pulse-UWB systems have been demonstrated at channel pulse rates in excess of 1. Ultra-wideband is also used in "see-through-the-wall" precision radar-imaging technology,    precision locating and tracking using distance measurements between radiosand precision time-of-arrival-based localization approaches.
Since UWB has almost impulse-like channel response, a combination of multiple antenna techniques is preferable as well. Point scatterer models of walking humans, dogs and domestic cats and a mathematical model of an ultra-wideband pulse-doppler radar was used when generating the synthetic training data.
In an effort to determine the practicability of this radar technology, the U.
In terms of military use, a UWB Doppler radar could demonstrate ground, foliage, and wall penetrating capabilities. To increase the transmission range, this system exploits distributed antennas among different nodes. High-data-rate UWB may enable wireless monitorsthe efficient transfer of data from digital camcorderswireless printing of digital pictures from a camera without the need for a personal computer and file transfers between cell-phone handsets and handheld devices such as portable media players.
We are pleased that our radar technology was implemented here and that after several real recordings the system was able to correctly classify the targets with a high success rate. It also affects UWB transmissions, but according to the Shannon-Hartley theorem and the variety of geometries applying to various frequencies the ability to compensate is enhanced.
Applications[ edit ] Ultra-wideband characteristics are well-suited to short-distance applications, such as PC peripherals. UWB, however, uses lower power. The solution consists of an algorithm for generating a targets micro-doppler signature through frequency analysis of the radar signal, a multi-layer artificial neural network for classifying the target based on the information in the processed signal, and a generator that creates synthetic data for training the artificial neural network.
Another feature of UWB is its short broadcast time.
According to the Shannon—Hartley theoremthe channel capacity of a properly encoded signal is proportional to the bandwidth of the channel and the logarithm of the signal-to-noise ratio SNR assuming the noise is additive white Gaussian noise.
The system was able to correctly classify the targets in the recordings with a very high confidence. Channel capacity is the theoretical maximum possible number of bits per second of information that a system can convey through one or more links in an area. This allows UWB to reap the benefits of relative immunity to multipath fadingunlike carrier-based systems which are subject to deep fading and intersymbol interference.
There has been concern over interference between narrowband and UWB signals that share the same spectrum. Other UWB systems use channel-equalization techniques to achieve the same purpose.
On the other hand, communications systems favor high repetition rates typically in the range of one to two gigapulses per secondthus enabling short-range gigabit-per-second communications systems.
Some real recordings were made using a Novelda radar module featuring their X2 radar system-on-chip SoC. It serves as a potential alternative to continuous-wave radar systems since it involves less power consumption and a high-resolution range profile.
However, its low signal-to-noise ratio has made it vulnerable to errors. Ideally, the receiver signal detector should match the transmitted signal in bandwidth, signal shape and time.
Random variations were applied to the model parameters to mimic the real-world diversity experienced between the different specimen of the same species. This helps overcome multipath propagationas at least some of the frequencies have a line-of-sight trajectory.
Forward error correction — used in high-data-rate UWB pulse systems — can provide channel performance approaching the Shannon limit.Ultra-wideband (also known as UWB, ultra-wide band and ultraband) is a radio technology that can use a very low energy level for short-range, high-bandwidth communications over.
Ultra-wideband Radar Based Human Motion Analysis A Thesis Presented to the Faculty of the Daniel Felix Ritchie School of Engineering and Computer Science. UWB Radar Simulator for classifying Humans and Animals based on Micro-Doppler Signatures 2 years ago | TECHNOLOGY Helge Langen, a student at the Norwegian University of Science and Technology (NTNU) has delivered a master thesis on the development of a Ultra-Wideband radar system using micro-doppler processed data to classify radar targets.
This thesis proposes and investigates two techniques in ultra-wideband (UWB) radar based human motion analysis.
The first one is accurate human body landmark detection using UWB radars. The detection is achieved by moving target indication (MTI) and constant false alarm rate detection (CFAR).
bandwidth antipodal Vivaldi antenna is a good candidate for use with Novelda UWB radar chip and other UWB integrated circuits and portable electronics. The antenna is being used for ranging, one and two dimensional tracking along with Novelda R2A UWB radar chip.
ULTRA WIDEBAND RADAR ANTENNA DESIGN FOR. SNOW MEASUREMENT APPLICATIONS by John Samy Mosy A thesis submitted in partial fulfillment of the requirements for the degree.Download