Equivalence between orbital angular momentum and multiple-input multiple-output in uniform circular arrays: Investigation by eigenvalues

2018 ◽  
Vol 60 (5) ◽  
pp. 1072-1075 ◽  
Author(s):  
Takuichi Hirano
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Multiple Input Multiple Output ◽  
Circular Arrays ◽  
Multiple Input ◽  
Input Multiple Output

scholarly journals The Capacity Gain of Orbital Angular Momentum Based Multiple-Input-Multiple-Output System

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Zhuofan Zhang ◽  
Shilie Zheng ◽  
Yiling Chen ◽  
Xiaofeng Jin ◽  
Hao Chi ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Multiple Input Multiple Output ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Output System ◽  
Capacity Gain

scholarly journals Three-Mode Vortex Wave Generator with Double-Layer Patch Antennas

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Jun Hu ◽  
Tong-Tong Qiu ◽  
Xue Lan ◽  
Wei Xu ◽  
Song-Song Qian
Keyword(s):  
Angular Momentum ◽  
Double Layer ◽  
Orbital Angular Momentum ◽  
Multiple Input Multiple Output ◽  
Patch Antennas ◽  
Circular Array ◽  
Planar Antennas ◽  
Multiple Input ◽  
Wave Generator ◽  
Input Multiple Output

With the development of Multiple-Input Multiple-Output technologies, researches on radio vortex wave with orbital angular momentum have become active. At the same time, generators of miniaturized planar antennas have become very interesting. Considering multilayer package, we proposed a uniform circle array consisting of four double-layer patch antennas with microstrip backfeeds. The antenna can generate three modes of vortex waves, which works at frequency 7.6GHz with a bandwidth 8.5%. Compared with orbital angular momentum antennas of phased uniform circular array with other cells, this proposed structure can be easily integrated with planar feeding networks and decoupling networks.

scholarly journals Orbital Angular Momentum-Based Multiple-Input-Multiple-Output with Receive Antenna Shift Keying for 6G

Electronics ◽  
2021 ◽  
Vol 10 (13) ◽  
pp. 1567
Author(s):  
Sang-Hoon Lee ◽  
Ahmed Al Al Amin ◽  
Soo-Young Shin
Keyword(s):  
Angular Momentum ◽  
Wireless Communication ◽  
Communication Systems ◽  
Multiple Input Multiple Output ◽  
Wireless Communication Systems ◽  
Time Code ◽  
Multiple Input ◽  
Shift Keying ◽  
Input Multiple Output ◽  
Receive Antenna

Spectral efficiency is a major concern for future 6G wireless communication systems. Thus, an appropriate scheme is needed to provide channel capacity improvement for multiple transmitters and receiver-based wireless communication systems without consuming extra resource for communication (e.g., frequency/time/code) or causing interference. Therefore, to fulfill the mentioned requirements for the future 6G wireless network, orbital angular momentum-based multiple-input-multiple-output (OAM-MIMO) multiplexing technique is incorporated with the receive antenna shift keying (RASK) technique in this study (termed as the OAM-MIMO-RASK scheme). OAM-MIMO-RASK can transfer multiple symbols from multiple transmitters to different receivers simultaneously by using multiple subchannels using the OAM and RASK techniques without any interference or additional resource (frequency/time/code). The numerical results illustrated that the proposed OAM-MIMO-RASK can achieve almost double capacity than the existing OAM-MIMO scheme and significantly higher capacity than the existing RASK-based scheme for different values of signal-to-noise ratio. Moreover, the simulation result is validated by the theoretical result which is also shown by the numerical result. In addition, due to different normalized distances from the transmitters and receivers, the proposed OAM-MIMO-RASK scheme can achieve almost double capacity than the existing OAM-MIMO scheme by using OAM-MIMO and RASK technique effectively which is also depicted by the numerical results.

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