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FPGA Architectures for Fast Steerable Beam-Enhanced Digital Aperture Arrays

Weesinghe Weerasinha , Sewwandi Wijayaratna

Abstract Details

2014, Master of Science in Engineering, University of Akron, Electrical Engineering.
Beam-enhanced digital aperture arrays employ two-dimensional (2-D) in finite impulse response (IIR) beam filters as a pre-processing stage to existing phased/timed-array beamforming to obtain i significantly lower side-lobe levels (SLLs) for the same array size. We propose end-to-end digital hardware architectures for beam-enhanced linear aperture arrays including four sub-systems: 2-D IIR pre-filtering; real-time beam steering via fast computation of filter coefficient; compensation for non-linear phase; and conventional phased/timed-array beamforming. Speed-optimized systolic array (SA) digital architectures are proposed for 1st and 2nd order 2-D IIR pre- filtering, including fast computation of filter coefficients to enable real-time beam steering at nano-second speeds. The inherent non-linear phase of 2-D IIR pre- filter is compensated via fast Fourier transform (FFT)-based phase rotations. Digital designs are implemented on Xilinx Virtex-6 XC6VLX240T fiield-programmable gate array (FPGA) platform and tested using on-chip hardware co-simulation (HCS). For 64 antennas, with binary phase shift keying (BPSK) modulation, the beam-enhanced digital aperture array provides better than 10 dB in bit error rate (BER) vs. signal- to-interference ratio (SIR) performance compared to conventional phased/timed array beamforming.
Arjuna Madanayake, Dr. (Advisor)
S.I. Hariharan, Dr. (Advisor)
Kye-Shin Lee, Dr. (Committee Member)
133 p.

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Citations

  • Weesinghe Weerasinha , S. W. (2014). FPGA Architectures for Fast Steerable Beam-Enhanced Digital Aperture Arrays [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1407762895

    APA Style (7th edition)

  • Weesinghe Weerasinha , Sewwandi. FPGA Architectures for Fast Steerable Beam-Enhanced Digital Aperture Arrays. 2014. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1407762895.

    MLA Style (8th edition)

  • Weesinghe Weerasinha , Sewwandi. "FPGA Architectures for Fast Steerable Beam-Enhanced Digital Aperture Arrays." Master's thesis, University of Akron, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1407762895

    Chicago Manual of Style (17th edition)