Abstract:
In this review paper, recent advancements in multidimensional
(MD) spatio-temporal signal processing for highlydirectional
radio frequency (RF) antenna array based receivers
are discussed. MD network-resonant beamforming filters having
infinite impulse response (IIR) and recursive spatio-temporal
signal flow graphs are reviewed. The concept of MD networkresonant
pre-filtering is described as a modification to existing
phased/timed array beamforming back-ends to achieve improved
side-lobe performance in the array pattern, leading to better
interference rejection capabilities. Both digital and analog signal
processing models are described in terms of their system transfer
functions and signal flow graphs. Example MD frequency response
and RF antenna array pattern simulations are presented.
