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In this paper, a novel simplified architecture of inter-channel code division multiplexing (IC-CDM) for radar receiver is presented. This architecture uses multi-phase code to distinguish different channels from the aggregate signal, so that all array elements can share one set of signal processor instead of such a device on each element in the previous technology. In this paper, a computer simulation...
This paper describes a millimeter-wave spread spectrum digital beamforming (MMW-SSDBF) technique employing large-aperture 2D MIMO virtual arrays. The MIMO array utilizes truly shift-orthogonal (TSOC) radar waveforms in order to significantly reduce hardware complexity, thereby enabling implementation of the low-cost wafer array. The architecture utilizes simple branch-line coupler bi-phase modulators...
This paper presents the conceptual design of a compact 2×2 array receiver for GNSS applications. Besides mere miniaturization, the goal of this work is also investigation on novel techniques for coping with the strong mutual coupling imposed in electrically small antenna arrays and RF front ends, by means of eigenmode reception and digital beamforming in the beam space.
This paper describes technology development efforts in support of phased-array digital beamforming at Applied Radar, Inc. The development efforts are aimed at increasing the bandwidth and dynamic range and enabling real-time throughput of multi-channel array data. This digital beamforming approach enables improved calibration, increased coverage through multiple receive beams, and adaptive processing...
This paper describes the development of Digital Beamforming (DBF) architectures, techniques, and hardware performance demonstrations that can be incorporated into the Geodesic Dome Phased Array Antenna (GDPAA), a large multi-beam conformal phasedarray antenna. The DBF system can provide functions for satellite Tracking, Telemetry and Commanding (TT&C), with significant improvements in adaptive...
A compact modular 24 GHz imaging radar sensor for digital beamforming is presented. Besides digital beamforming on receive, the advantage of multiple switched transmitters is used for increasing the angular resolution, which requires less hardware effort. The presented FMCW radar sensor provides up to eight switchable transmitters and eight receiver channels for parallel receiving, allowing digital...
Synthetic Aperture Radar (SAR) is a well-proven imaging technique for remote sensing of the Earth. However, conventional SAR systems are not capable of fulfilling the increasing demands for improved spatial resolution and wider swath coverage. To overcome these inherent limitations, several innovative techniques have been suggested which employ multiple receive-apertures to gather additional information...
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