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UWB is an IEEE 802.15.4a/z standard technology optimized for secure micro-location-based applications. It enables distance and location to be calculated indoors or outdoors with unprecedented accuracy – within a few centimeters – by measuring the time it takes radio signals to travel between devices. Along with centimeter-level
This chapter provides a comprehensive overview of ultra-wideband communications, starting with its history and background. Next the dis-cussion turns to the concepts behind UWB technology, as well as its advantages and challenges in wireless communications.
In the first part of this section, we will demonstrate the time-domain calculation of the group delay and amplitude variation at the example of the coplanar UWB antenna presented in Sect.4.2.
1 lis 2009 · In this paper, we propose a time-domain synthesis approach for ultra-wide band antennas. The method is based on a finite expansion of the antenna time-domain response.
1 Introduction. There are multiple techniques for generating UWB signals with various data modulation and randomization schemes. This Annex describes frequency-domain and time-domain measurement techniques of power spectral density for UWB transmissions and for all types of UWB signals.
Principles of UWB vTime Domain - Extremely short pulses - Very low duty cycle vFrequency Domain - Ultra wide spectrum - Low power spectral density - Acceptable interference with other users
UWB communication is achieved by sending ultra-short, time-domain pulses in predefined bursts and sequences to achieve different functionalities. A single pulse can be less than 1ns long, which results in a very large bandwidth in the frequency domain.
