Series Info:Signal Processing;Volume: 138 Pages: 35-47
Type:Article
Keywords:University of Compressive Sensing, DOA Estimation, Measurement Design
Abstract:
In this paper we investigate the design of
compressive antenna arrays for direction of arrival (DOA)
estimation that aim to provide a larger aperture with a
reduced hardware complexity by a linear combination
of the antenna outputs to a lower number of receiver
channels. We present a basic receiver architecture of
such a compressive array and introduce a generic system
model that includes different options for the hardware
implementation. We then discuss the design of the analog
combining network that performs the receiver channel
reduction, and propose two design approaches. The first
approach is based on the spatial correlation function which
is a low-complexity scheme that in certain cases admits
a closed-form solution. The second approach is based
on minimizing the Cramer-Rao Bound (CRB) with the ´
constraint to limit the probability of false detection of
paths to a pre-specified level. Our numerical simulations
demonstrate the superiority of the proposed optimized
compressive arrays compared to the sparse arrays of the
same complexity and to compressive arrays with randomly
chosen combining kernels.