Author : Sanghyouk Choi
Affiliation : Department of Electrical Engineering, KAIST,
Daejeon
Country :
Korea
Category : Computer Science & Information Technology
Volume, Issue,
Month, Year
: 6, 1, November, 2016
Abstract
We
present the gradient and Hessian of the trace of the multivariate Cramér-Rao
bound (CRB) formula for unknown impinging angles of plane waves with
non-unitary beamspace measurements,. These gradient and Hessian can be used to
find the optimal beamspace transformation matrix, i.e., the optimum
beamsteering angles, using the Newton-Raphson iteration. These trace formulas
are particularly useful to deal with the multiple source senario. We also show
the mean squred error (MSE) performance gain of the optimally steered beamspace
measurements compared with the usuall DFT steered measurements, when the angle
of arrivals (AOAs) are estimated with stochastic maximum likelihood (SMLE)
algorithm.
Keyword :
Cramér-Rao bound, beamspace transformation, correlated noise, DFT beams,
subarray formation
For More Details : https://airccj.org/CSCP/vol6/csit64813.pdf
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