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eBook High-Resolution Residue Antenna Architectures for Wideband Direction Finding download

by Luis E. Rodrigues

eBook High-Resolution Residue Antenna Architectures for Wideband Direction Finding download ISBN: 1423582683
Author: Luis E. Rodrigues
Publisher: Storming Media (1996)
Language: English
ePub: 1397 kb
Fb2: 1105 kb
Rating: 4.9
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The performance of two novel interferometer antenna architectures for high resolution, wideband direction .

High-Resolution Residue Antenna Architectures for Wideband Direction Finding. The performance of two novel interferometer antenna architectures for high resolution, wideband direction finding are investigated. The first configuration incorporates a Symmetrical Number System (SNS) encoding of the interferometer amplitude response (symmetrical folding waveform). The second configuration incorporates a Residue Number System (RNS) encoding of the interferometer phase response. The second configuration incorporates a Residue Number System (RNS) encoding of the interferometer phase response (saw tooth waveform).

Jenn . Pace . Powers . 2002) High-Resolution Acoustic Arrays Using Optimum ystem Processing. In: Lee H. (eds) Acoustical Imaging. Acoustical Imaging, vol 24.

E. M. Rodrigues High-resolution residue antenna architectures for wideband direction finding, Master’s thesis, Naval Postgraduate School, June. P. Papandreau Design and prototype development of an optimum symmetrical number system direction finding array, Master’s thesis, Naval Postgraduate School, March 1997. Jenn .

This architecture is complemented by both high instantaneous dynamic range and .

This architecture is complemented by both high instantaneous dynamic range and frequency selectivity (adjacent channel rejection). For direction finding and signal acquisition, the system is typically configured with a nineelement Model 632 monopole antenna array. Optional TCI and thirdparty antenna arrays also are compatible. Raptor RXi Ultra-fast scanning Countersurveillance Receiver.

to a direction finding antenna eliminating the need for conventional down . However, the lack of a convenient high resolution encoding architecture inhibits the amount of progress that can ultimately be made.

ABSTRACT (Maximum 200 words) A novel high-power digital direction finding antenna architecture is presented. Using optical processors to fold the antenna signal and a high-speed laser for sampling, these high resolution SNS ADCs may be interfaced directly to a direction finding antenna eliminating the need for conventional down conversion and baseband processing However, the lack of a convenient high resolution encoding architecture inhibits the amount of progress that can ultimately be made.

Wideband Direction of Arrival Estimation in the Presence of Unknown Mutual Coupling. The design and full-wave analysis of an antenna system for ultra-wideband radio direction finding applications is presented

Wideband Direction of Arrival Estimation in the Presence of Unknown Mutual Coupling. Sensors, Vol. 17, Issue. The design and full-wave analysis of an antenna system for ultra-wideband radio direction finding applications is presented. The elliptical dipole antenna is selected as antenna element due to its robust circuital and radiation properties. The influence of the conformal deformation on the antenna performance has been studied in details.

Direction finding by exploiting the directional radiation patterns of a switched parasitic antenna (SPA) is. .

Direction finding by exploiting the directional radiation patterns of a switched parasitic antenna (SPA) is considered. By employing passive elements (parasites), which can be shorted to ground using pin diodes, directional radiation patterns can be obtained. cle{solutionDF, title {High-resolution direction finding using a switched parasitic antenna}, author {Thomas Svantesson and Mathias Wennstrom}, journal {Proceedings of the 11th IEEE Signal Processing Workshop on Statistical Signal Processing (Cat. N. 1TH8563)}, year {2001}, pages {508-511} }.

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In optical implementations of residue arithmetic architectures, look-up .

In optical implementations of residue arithmetic architectures, look-up tables are generally used, which can also be used for a signed-digit implementation. Download PDF. Save to my library. This paper describes a wideband electro-optic direction finding (DF) processor employing an array of laser diodes, an array of photodetectors, and a network of fiber optic delay lines. Higher frequency antenna systems may require smal1er dimensions, so a modular approach with both amplification and signal control at each element can be envisioned for future phased arrays.

This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A994313. The abstract provided by the Pentagon follows: The performance of two novel interferometer antenna architectures for high resolution, wideband direction finding are investigated. The first configuration incorporates a Symmetrical Number System (SNS) encoding of the interferometer amplitude response (symmetrical folding waveform). The second configuration incorporates a Residue Number System (RNS) encoding of the interferometer phase response (saw tooth waveform). The residue architectures serve as a source for resolution enhancement in an interferometer array by decomposing the analog spatial filtering operation into a number of parallel sub-operations (moduli) that are of smaller computational complexity. Each sub- operation only requires a precision in accordance with the size of the modulus. A much higher resolution is achieved after the N moduli are used and the results of these low precision sub-operations are recombined. A four-element, 3 channel array using the moduli set m1 = 3, m2 = 4 and m3 = 5 was constructed in a ground plane using rectangular waveguide elements with a center frequency of 8.5 GHz. Experimental results are compared with the simulation results to demonstrate the advantages of this approach. The frequency response of the RNS array is investigated numerically. To correct the quantization errors due to any frequency offset, a fast correction algorithm is derived and is shown to have excellent results over a wide bandwidth.