Estimation and Compensation for RF Chain Mismatch in UCA OAM Radio Systems

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This letter presents a calibration technique for uniform circular array orbital angular momentum systems that can estimate and compensate for gain/phase mismatch among radio-frequency (RF) chains in the transmitter and the receiver simultaneously. The basic idea is that the RF chain mismatch parameters can be estimated from a mathematical model of channel estimates when the ideal channel matrix is known a priori. It is shown that the maximum-likelihood (ML) channel estimation error becomes a zero-mean complex Gaussian random variable, and then, a joint ML solution for the RF mismatch parameters is derived.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2018-11
Language
English
Article Type
Article
Citation

IEEE COMMUNICATIONS LETTERS, v.22, no.11, pp.2274 - 2277

ISSN
1089-7798
DOI
10.1109/LCOMM.2018.2867855
URI
http://hdl.handle.net/10203/247613
Appears in Collection
EE-Journal Papers(저널논문)
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