Array beam patterns of UWB-throb signals with random-throb rate
An ultrawideband (UWB)-throb signal is composed of a large number of extremely narrow pulses and characterized by pulse repetition frequency (PRF) that is a linear function of time. The design of the UWB-throb signal and its applications for high-resolution radar have been recently introduced in the...
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Published in | 2012 IEEE Radar Conference pp. 0812 - 0817 |
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Main Author | |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
01.05.2012
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Subjects | |
Online Access | Get full text |
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Summary: | An ultrawideband (UWB)-throb signal is composed of a large number of extremely narrow pulses and characterized by pulse repetition frequency (PRF) that is a linear function of time. The design of the UWB-throb signal and its applications for high-resolution radar have been recently introduced in the radar literature. In this paper, we present the principle of space-time array processing based on UWB-throb signals with nonlinear-random PRF, or random-throb rate. The space-time resolution function for the randomly-throbbing UWB signal is derived and used to obtain the array factor and the signal-temporal profile for different design parameters. The distinguishable features of the array factor are a narrow mainlobe and very low level sidelobes. The beamwidth of the array factor is a decreasing function of signal bandwidth and array size. The structure of the signal-temporal profile, referred to as the temporal resolution function, is affected only by a change in signal duty cycle or throb rate. Such features are attractive for high-resolution imaging UWB radar. |
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ISBN: | 1467306568 9781467306560 |
ISSN: | 1097-5659 2375-5318 |
DOI: | 10.1109/RADAR.2012.6212249 |