Title :
Oversampling transmit and receive antenna arrays
Author :
Yeang, Chen-Pang ; Wornell, Gregory W. ; Zheng, Lizhong
Author_Institution :
IHPST, Univ. Toronto, Toronto, ON, Canada
Abstract :
A dense antenna array architecture is developed to ease the circuit requirements of the radio frequency (RF) front-end in beamforming applications. In the architecture, antennas are spaced more closely than would otherwise be required to exploit the available degrees of freedom. Such an array structure is analogous to temporally oversampled data conversion systems, which have reduced quantizer resolution requirements. For a linear, uniformly-spaced array, we develop a spatial-domain version of ΔΣ quantization, and show that with binary quantization for the in-phase and quadrature components of antenna weights, even relatively modest amounts of oversampling can reproduce beamforming patterns of interest to practically useful levels of accuracy.
Keywords :
array signal processing; delta-sigma modulation; linear antenna arrays; radiofrequency identification; receiving antennas; transmitting antennas; ΔΣ quantization; beamforming applications; binary quantization; dense antenna array architecture; oversampled data conversion systems; quantizer resolution requirements; radio frequency front-end; receive antenna arrays; transmit antenna arrays; Antenna accessories; Antenna arrays; Array signal processing; Circuits; Data conversion; Linear antenna arrays; Quantization; Radio frequency; Receiving antennas; Spatial resolution; ΔΣ quantization; Phased-arrays antennas; RF circuits; array processing; millimeter-wave imaging; wireless communication;
Conference_Titel :
Acoustics Speech and Signal Processing (ICASSP), 2010 IEEE International Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
978-1-4244-4295-9
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2010.5496305