Scatterer Localization Using Large-Scale Antenna Arrays Based on a Spherical Wave-Front Parametric Model

In this contribution, an algorithm based on the space-alternating generalized expectation-maximization principle is proposed for estimating the locations of scatterers involved in the last-hops of propagation paths when a large-scale antenna array is used in a receiver for channel measurement. The u...

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Vydáno v:IEEE Transactions on Wireless Communications Ročník 16; číslo 10; s. 6543 - 6556
Hlavní autoři: Xuefeng Yin, Wang, Stephen, Nan Zhang, Bo Ai
Médium: Journal Article
Jazyk:angličtina
japonština
Vydáno: IEEE 01.10.2017
Institute of Electrical and Electronics Engineers (IEEE)
Témata:
Antenna accessories
Antenna arrays
Antenna measurements
Directive antennas
large-scale antenna array
MIMO
Receiving antennas
space-alternating generalized expectation-maximization (SAGE) algorithm
spatial consistency
Spherical wavefront
Wireless communication
ISSN:1536-1276
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Shrnutí:In this contribution, an algorithm based on the space-alternating generalized expectation-maximization principle is proposed for estimating the locations of scatterers involved in the last-hops of propagation paths when a large-scale antenna array is used in a receiver for channel measurement. The underlying generic parametric model is constructed under the spherical wave-front assumption, which allows characterizing a path with a new parameter, i.e., the distance between the scatterer at the last-hop of the path and a specific receiving antenna, additional to the conventional parameters characterizing a specular path under the plane wave-front assumption. Cramér-Rao lower bounds of mean squared errors are derived for the parameter estimators in a single-path scenario, and their accuracy is evaluated through Monte Carlo simulations. The performance of the algorithm when being applied in reality is also evaluated through experiments conducted in an office with a carrier frequency of 9.5 GHz, a bandwidth of 500 MHz, and the receiver equipped with a 121-element virtual array. The proposed signal model and algorithm can be extended to the case of localizing the scatterers in the first- and last-hops of paths when large-scale antenna arrays are used in both the transmitter and the receiver.
ISSN:1536-1276
DOI:10.1109/TWC.2017.2725260