Spectrum and RFI Sensing using 2.4 GHz Digital Multi-Beam Circular Apertures with 360 FoV
Conference
Madanayake, A, Thevathasan, B, Rathnayaka, C et al. (2025). Spectrum and RFI Sensing using 2.4 GHz Digital Multi-Beam Circular Apertures with 360 FoV
. 16-18. 10.1109/SHARC63955.2025.10908963
Madanayake, A, Thevathasan, B, Rathnayaka, C et al. (2025). Spectrum and RFI Sensing using 2.4 GHz Digital Multi-Beam Circular Apertures with 360 FoV
. 16-18. 10.1109/SHARC63955.2025.10908963
Radio spectrum monitoring across 360-degree field-of-view (FoV) is a fundamental requirement for RF situational awareness. RF awareness demands sensed intelligence on the direction of arrival, frequency occupancy, modulation type signal power, and bandwidth for each waveform present. This article includes an end-to-end design and realization of an array processor, consisting of sixteen uniformly spaced antennas in a circular array at 2.4 GHz, providing 360-degrees FoV using digital multi-beam beamforming. The algorithms encapsulate a low-complexity multi-beam circular array processor with each RF beam being processed by an approximate discrete Fourier transform (ADFT) algorithm. All directional sensing covered by sixteen simultaneous RF beams are 100 MHz in baseband. A fully parallel systolic-array processor for multi-beams is realized using Xilinx Virtex-6 FPGA and CASPER toolchain.
