FFT-based phase compensation of 2-D beam digital filters for electronically steerable RF arrays

Author

Wijayaratna, Sewwandi ; Madanayake, A. ; Bruton, Len

Author_Institution

Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA

fYear

2013

fDate

4-7 Aug. 2013

Firstpage

1007

Lastpage

1010

Abstract

Radio-frequency (RF) two-dimensional (2-D) infinite impulse response (IIR) space-time plane-wave frequency-planar beam digital filters have potential applications in ultra-wideband (UWB) directional filtering of propagating electromagnetic far-field plane-waves. Such plane-wave filters achieve highly directional digital RF beamforming for aperture array applications. The phase response of emerging 2-D beam filters which are designed using the concept of frequency-planar resonant network prototypes is studied in this paper. The high frequency phase non-linearities are quantified and compensated using a real-time FFT-based multirate phase rotator architecture.

Keywords

IIR filters; array signal processing; electromagnetic wave propagation; fast Fourier transforms; filtering theory; two-dimensional digital filters; 2D IIR; 2D beam digital filter; 2D infinite impulse response; RF infinite impulse response; UWB directional filtering; aperture array application; digital RF beamforming; electromagnetic wave propagation; electronically steerable RF array; far field plane wave propagation; frequency planar beam digital filter; frequency planar resonant network; multirate phase rotator architecture; phase compensation; phase response; plane wave filter; radiofrequency infinite impulse response; real time FFT; space time plane wave beam digital filter; ultra wideband directional filtering;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on

Conference_Location

Columbus, OH

ISSN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2013.6674822

Filename

6674822