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Towards a Low-SWaP 1024-Beam Digital Array: A 32-Beam Subsystem at 5.8 GHz

https://doi.org/10.1109/TAP.2019.2938704

Madanayake, Arjuna ; Mandal, Soumyajit ; Rappaport, Theodore S. ; Ariyarathna, Viduneth ; Madishetty, Suresh ; Pulipati, Sravan ; Cintra, Renato J. ; Coelho, Diego ; Oliviera, Raiza ; Bayer, Fabio M. ; et al ( February 2020 , IEEE Transactions on Antennas and Propagation)

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Fast Radix-32 Approximate DFTs for 1024-Beam Digital RF Beamforming

https://doi.org/10.1109/ACCESS.2020.2994550

Madanayake, Arjuna ; Cintra, Renato J. ; Akram, Najath ; Ariyarathna, Viduneth ; Mandal, Soumyajit ; Coutinho, Vitor A. ; Bayer, Fabio M. ; Coelho, Diego ; Rappaport, Theodore S. ( January 2020 , IEEE Access)
Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond

https://doi.org/10.1109/ACCESS.2019.2921522

Rappaport, Theodore S. ; Xing, Yunchou ; Kanhere, Ojas ; Ju, Shihao ; Madanayake, Arjuna ; Mandal, Soumyajit ; Alkhateeb, Ahmed ; Trichopoulos, Georgios C. ( January 2019 , IEEE Access)

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Analog Approximate-FFT 8/16-Beam Algorithms, Architectures and CMOS Circuits for 5G Beamforming MIMO Transceivers

https://doi.org/10.1109/JETCAS.2018.2832177

Ariyarathna, Viduneth ; Madanayake, Arjuna ; Tang, Xinyao ; Coelho, Diego ; Cintra, Renato J. ; Belostotski, Leonid ; Mandal, Soumyajit ; Rappaport, Theodore S. ( September 2018 , IEEE Journal on Emerging and Selected Topics in Circuits and Systems)
Wideband $N$ -Beam Arrays Using Low-Complexity Algorithms and Mixed-Signal Integrated Circuits

https://doi.org/10.1109/JSTSP.2018.2822940

Perera, Sirani M. ; Ariyarathna, Viduneth ; Udayanga, Nilan ; Madanayake, Arjuna ; Wu, Ge ; Belostotski, Leonid ; Wang, Yingying ; Mandal, Soumyajit ; Cintra, Renato J. ; Rappaport, Theodore S. ( May 2018 , IEEE Journal of Selected Topics in Signal Processing)

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An Offset-Canceling Approximate-DFT Beamforming Architecture for Wireless Transceivers

https://doi.org/10.1109/ISCAS.2018.8351765

Zhao, Haixiang ; Mandal, Soumyajit ; Ariyarathna, Viduneth ; Madanayake, Arjuna ; Cintra, Renato J. ( May 2018 , IEEE International Symposium on Circuits and Systems (ISCAS))

We describe a current-mode multi-beam beamforming approach for 5G wireless applications based on a low-complexity approximate-DFT (a-DFT). Dynamic current mirrors are used to cancel errors in the current copying and scaling operations required to realize a-DFT matrices, thus resulting in an accurate and scalable architecture. The circuit design for the case of 8-point a-DFT has been validated with transistor-level simulations in the UMC 0.18 μm CMOS process.
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