NDLI: Reconfigurable phase-linearizer for 2-D IIR RF-to-bits antenna-array digital beam filters

Content Provider	IEEE Xplore Digital Library
Author	Wijayaratna, S. Madanayake, A. Hariharan, S.I. Bruton, L.T.
Copyright Year	2013
Description	Author affiliation: Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA (Wijayaratna, S.; Madanayake, A.; Hariharan, S.I.) \|\| Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada (Bruton, L.T.)
Abstract	Radio-frequency (RF) digital phased array antennas are highly-useful for achieving electronically-scanned smart antenna apertures with applications in radar, signal intelligence, microwave and mm-wave imaging and wireless communication systems. However, digital phased array algorithms are of high computational complexity, which leads to correspondingly high circuit complexity in a VLSI implementation. A 2-D IIR beam space-time plane-wave digital filter can achieve the required electronically-scanned RF beams albeit at an order of magnitude lower circuit complexity compared to phased arrays at the cost of non-linear phase response. The proposed method approximately rectifies the non-linearity in the phase response using an FFT-based phase compensation method which linearises the response at higher frequencies close to the Nyquist limit where the phase non-linearity is worst in the beam filter response. FPGA prototypes using a Xilinx Virtex-4 Sx35-10ff668 device on an XtremeDSP Kit-4 are provided, which show real-time operation at up to 315 MHz.
Starting Page	1
Ending Page	5
File Size	248126
Page Count	5
File Format	PDF
e-ISBN	9781479904341
DOI	10.1109/ICICS.2013.6782800
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-12-10
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arrays Field programmable gate arrays Radio frequency Complexity theory Antenna arrays Phase distortion Radar antennas
Content Type	Text
Resource Type	Article

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