| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 94 === ABSTRACT
In this thesis, we propose low-complexity, yet high accuracy algorithms to
jointly estimate two-dimensional directions of arrival (DOAs) and carrier frequency
using a uniform rectangular array. To achieve this, we utilize the (2-D) unitary
Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT)
and one-dimensional (1-D) unitary ESPRIT to estimate the 2-D DOAs and frequencies
of the incoming rays, respectively. Also, to enhance the performance, a
signal partitioning process, implemented by a set of projection matrices, is invoked
in between the unitary ESPRIT algorithms. To further reduce the computation,
we also decompose the 2-D DOA estimation process, so that only 1-D unitary
ESPRIT algorithm are required. Similar techniques are also employed for joint
2-D DOA and delay estimation. Conducted simulations show that the new algorithms
can provide satisfactory performance compared with previous works, but
with drastically reduced computational complexity.
Keywords: 2D DOA, carrier frequencies, time delay, projection matrices, 2D
Unitary-ESPRIT, 1D Unitary-ESPRIT, parameter estimation
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