Wireless Technology for Extreme NaaS—Remote Beamforming Schemes for Analog Radio-over-fiber-based High-frequency-band Wireless Communication Systems

2021 ◽  
Vol 19 (10) ◽  
pp. 38-43
Author(s):  
Mizuki Suga ◽  
Kota Ito ◽  
Takuto Arai ◽  
Yushi Shirato ◽  
Naoki Kita ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Frequency Band ◽  
High Frequency ◽  
Communication Systems ◽  
Radio Over Fiber ◽  
Wireless Communication Systems ◽  
Wireless Technology ◽  
High Frequency Band

Dual-band slot microstrip patch antennas with dual-radiation modes for wireless communication

2019 ◽  
Vol 12 (2) ◽  
pp. 155-162
Author(s):  
Guangwei Yang ◽  
Jianying Li ◽  
Jiangjun Yang ◽  
Zijian Xing
Keyword(s):  
Wireless Communication ◽  
Frequency Band ◽  
High Frequency ◽  
Communication Systems ◽  
Low Frequency ◽  
Dual Band ◽  
High Frequency Band ◽  
Radiation Beam ◽  
Microstrip Patch ◽  
Dual Band Antenna

AbstractIn this paper, a novel compact dual-band microstrip patch antenna with dual-radiation modes is investigated. The proposed antenna consists of a rectangular ground plane, a U-shaped feed probe, and an H-shaped slot radiating patch. By adjusting the size of these structures, a dual-band antenna can be obtained. In the low-frequency band, the antenna can radiate one radiation beam with high gain. In the high-frequency band, the antenna can achieve monopole-like radiation pattern. Therefore, an antenna prototype is fabricated and measured for validation. Good agreement between the simulated and measured results is observed in this paper. The antenna's operating frequency ranges are 3.6–3.85 GHz in the low-frequency band and 5.1–6.1 GHz in the high-frequency band with the reflection coefficient less than −10 dB. At 3.7 GHz, the antenna radiate one beam with 8.8 dBi realized gain. At 5.5 GHz, it exhibits dual-radiation beams directed to −48 and 48° with 5.6 and 5.5 dBi realized gain in the xoz-plane and −48 and 48° with 2.9 and 3.0 dBi realized gain in the yoz-plane. Therefore, the proposed antenna is a good candidate for wireless communication systems.

scholarly journals Honeycomb Structure and Key Technologies of 5G Wireless Communication Network

2018 ◽  
Vol 232 ◽  
pp. 01013
Author(s):  
Siyan Duan
Keyword(s):  
Communication Network ◽  
Wireless Communication ◽  
Communication Systems ◽  
Honeycomb Structure ◽  
Wireless Communication Systems ◽  
Wireless Technology ◽  
Technology Application ◽  
Wireless Communication Network ◽  
Key Technologies ◽  
Technology Level

In recent years, wireless technology in China has been further improved. Wireless system designers have also begun research on 5G wireless communication systems and obtained good research results. The application of the 5G cellular structure can effectively solve the problems existing in the current wireless technology application, thereby promoting the further improvement of the wireless technology level. This paper mainly discusses the cellular technology and the key technologies of 5G wireless communication network.

Radio-Over-Fiber System for TDD-Based OFDMA Wireless Communication Systems

2007 ◽  
Vol 25 (11) ◽  
pp. 3419-3427 ◽  
Author(s):  
Hoon Kim ◽  
Jae Hun Cho ◽  
Sangho Kim ◽  
Ki-Uk Song ◽  
Hanlim Lee ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Radio Over Fiber ◽  
Wireless Communication Systems ◽  
Fiber System ◽  
Radio Over Fiber System

scholarly journals Frequency scheduling algorithm with the allocation of the main and additional frequency bands.

2021 ◽  
pp. 36-62
Author(s):  
Maksim Sergeevich Demichev ◽  
Konstantin Eduardovich Gaipov ◽  
Alena Alekseevna Demicheva ◽  
Rinat Faitulovich Faizulin ◽  
Dmitrii Olegovich Malyshev
Keyword(s):  
Wireless Communication ◽  
Frequency Band ◽  
Communication System ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
Frequency Range ◽  
Arbitrary Topology ◽  
Wireless Communication System ◽  
Frequency Planning ◽  
Planning Algorithm

The subject of this research is the frequency planning algorithm for networks with an arbitrary topology of links over radio channels. The algorithm determines the total number of non-overlapping frequency ranges for the entire network and provides the distribution of each frequency range between communication nodes. The algorithm consists of two stages: at the first stage, there is a search and simultaneous distribution of frequency channels, the so-called main frequency range, as a result, only one frequency range is allocated to each node; at the second stage, additional frequency channels are searched for, which can be used by a separate subset of nodes, thus , some nodes can use more than one frequency range, but several at once. The novelty of this research lies in the developed frequency planning algorithm for wireless communication systems with an arbitrary topology of communications over radio channels. The result of the operation of the algorithm for a wireless communication system is the allocation of radio frequencies for communication nodes from the common frequency band allocated for the wireless communication system, in terms of reuse, eliminating the effect of interference. The result for communication nodes is the allocation of a baseband and an additional frequency band, taking into account the topology of the radio network, which can be used by a separate subset that makes wireless communication systems resistant to narrowband random interference.

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