TY - GEN
T1 - Real-Time FPGA-Based Multi-Beam Directional Sensing of 2.4 GHz ISM RF Sources
AU - Pulipati, Sravan
AU - Ariyarathna, Viduneth
AU - Edussooriya, Chamira U.S.
AU - Wijenayake, Chamith
AU - Wang, Xin
AU - Madanayake, Arjuna
N1 - Publisher Copyright: © 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - A real-time directional sensing system is proposed for 2.4 GHz ISM band by exploiting the concept of spatiotemporal spectral white spaces. The proposed system consists of a 16-element patch antenna array, an FFT-based multi-beam beamformer and an energy detector. Our system operates at the baseband with quadrature sampling. Furthermore, digital architectures for two energy detectors that employ integrate-and-dump circuits are presented. With the multi-beam beamformer, the first energy detector can be employed to directional sensing and the second can be employed for both directional and spectral sensing of radio frequency sources. The multi-beam beamformer having 16 beams and the energy detectors are implemented on a ROACH-2 based FPGA system with a 160 MHz clock. With an 8-point temporal FFT, the second energy detector provides approximately 20 MHz bandwidth per temporal FFTbin. Preliminary experimental measurements obtained with WiFi devices and the first energy detector verify the proof-of-concept directional sensing of the proposed system.
AB - A real-time directional sensing system is proposed for 2.4 GHz ISM band by exploiting the concept of spatiotemporal spectral white spaces. The proposed system consists of a 16-element patch antenna array, an FFT-based multi-beam beamformer and an energy detector. Our system operates at the baseband with quadrature sampling. Furthermore, digital architectures for two energy detectors that employ integrate-and-dump circuits are presented. With the multi-beam beamformer, the first energy detector can be employed to directional sensing and the second can be employed for both directional and spectral sensing of radio frequency sources. The multi-beam beamformer having 16 beams and the energy detectors are implemented on a ROACH-2 based FPGA system with a 160 MHz clock. With an 8-point temporal FFT, the second energy detector provides approximately 20 MHz bandwidth per temporal FFTbin. Preliminary experimental measurements obtained with WiFi devices and the first energy detector verify the proof-of-concept directional sensing of the proposed system.
KW - Cognitive radio
KW - FPGA
KW - directional sensing
KW - multi-beam beamforming
KW - spectrum sensing
KW - white space
UR - https://www.scopus.com/pages/publications/85072784036
U2 - 10.1109/MERCon.2019.8818787
DO - 10.1109/MERCon.2019.8818787
M3 - Conference contribution
T3 - MERCon 2019 - Proceedings, 5th International Multidisciplinary Moratuwa Engineering Research Conference
SP - 129
EP - 134
BT - MERCon 2019 - Proceedings, 5th International Multidisciplinary Moratuwa Engineering Research Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 5th International Multidisciplinary Moratuwa Engineering Research Conference, MERCon 2019
Y2 - 3 July 2019 through 5 July 2019
ER -