An Improved High-Resolution Parameter Estimation Algorithm Incorporating Beamforming Techniques

When the conventional Space-Alternating Generalized Expectation-maximization (SAGE) algorithm is used to estimate the incident angle of the signal received by an antenna array with fixed aperture, the accuracy and resolvability of angle estimation are affected and limited by the aperture of the ante...

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Vydáno v:IEEE communications letters Ročník 27; číslo 5; s. 1387 - 1391
Hlavní autoři: Yu, Fan, Yin, Xuefeng, Guo, Mingqi, Rodriguez-Pineiro, Jose, Lee, Juyul, Hong, Jingxiang, Kim, Myung-Dom
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.05.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
angle estimation accuracy
Antenna arrays
Antennas
Apertures
Azimuth
Beamforming
BF weighting matrix
BFI-SAGE algorithm
Channel estimation
Estimation
High resolution
Maximum likelihood estimation
non-uniform scanning
Parameter estimation
resolvability
Scanning
Signal resolution
Spatial resolution
ISSN:1089-7798, 1558-2558
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Shrnutí:When the conventional Space-Alternating Generalized Expectation-maximization (SAGE) algorithm is used to estimate the incident angle of the signal received by an antenna array with fixed aperture, the accuracy and resolvability of angle estimation are affected and limited by the aperture of the antenna array. Therefore, in order to improve the angle estimation accuracy and resolvability beyond the limitation, we propose a beamforming (BF)-incorporated SAGE (BFI-SAGE) algorithm, which is a SAGE-based improved high-resolution parameter estimation (HRPE) algorithm, and it steers the orientation of beam utilizing a predefined BF weighting matrix. A non-uniform scanning mode is determined to achieve higher angle estimation accuracy in the angle range of interest, and the analysis of the angle estimation performance is performed for the cases of uniform and non-uniform scanning modes, respectively. The resolvability performance of the algorithm is also discussed.
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ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2023.3263646