A 2-D FFT-Based Transceiver Architecture for OAM-OFDM Systems With UCA Antennas

Radio orbital angular momentum (OAM) provides another perspective of spatial multiplexing to improve the spectrum efficiency. However, multipath induces severe intraand interchannel crosstalk. To solve the problem in a uniform circular array (UCA)-based OAM system, we first incorporate the effect of...

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Bibliographic Details
Published inIEEE transactions on vehicular technology Vol. 67; no. 6; pp. 5481 - 5485
Main Authors Chen, Rui, Yang, Wenhai, Xu, Hui, Li, Jiandong
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithms
Angular momentum
Antennas
Architecture
Baseband
Broadband
Computer simulation
Cost analysis
Crosstalk
Discrete Fourier transforms
Energy consumption
Fast Fourier transformations
Fourier transforms
Frequency division multiplexing
MIMO communication
multipath
OFDM
Orbital angular momentum
Orthogonal Frequency Division Multiplexing
Phase shifters
Receiving antennas
Subcarriers
Transceivers
Two dimensional analysis
uniform circular array
Wireless communication systems
Wireless communications
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Summary:Radio orbital angular momentum (OAM) provides another perspective of spatial multiplexing to improve the spectrum efficiency. However, multipath induces severe intraand interchannel crosstalk. To solve the problem in a uniform circular array (UCA)-based OAM system, we first incorporate the effect of sign changing of OAM reflection in modeling the multipath OAM channel. Then, we propose a transceiver architecture for broadband OAM orthogonal frequency-division multiplexing (OFDM) wireless communication systems, which uses baseband digital 2-D fast Fourier transform (FFT) rather than existing radio frequency analog phase shifters to generate and receive the OAM-OFDM signal, thus reducing energy consumption and hardware cost. At last, a flexible 2-D FFT algorithm is developed. Analysis and simulation results show that compared with the traditional row-column FFT algorithm, the proposed 2-D FFT algorithm could reduce the multiplication complexity by 41MN log2 N, where N and Mare the number of UCA antenna elements and the number of subcarriers, respectively.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2018.2817230