Abstract:
:It is widely believed that range resolution, the ability to distinguish between two closely situated targets, depends inversely on the bandwidth of the transmitted radar signal. Here we demonstrate a different type of ranging system, which possesses superior range resolution that is almost completely free of bandwidth limitations. By sweeping over the coherence length of the transmitted signal, the partially coherent radar experimentally demonstrates an improvement of over an order of magnitude in resolving targets, compared to standard coherent radars with the same bandwidth. A theoretical framework is developed to show that the resolution could be further improved without a bound, revealing a tradeoff between bandwidth and sweep time. This concept offers solutions to problems which require high range resolution and accuracy but available bandwidth is limited, as is the case for the autonomous car industry, optical imaging, and astronomy to name just few.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Komissarov R,Kozlov V,Filonov D,Ginzburg Pdoi
10.1038/s41467-019-09380-xsubject
Has Abstractpub_date
2019-03-29 00:00:00pages
1423issue
1issn
2041-1723pii
10.1038/s41467-019-09380-xjournal_volume
10pub_type
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