Airport array communication non-orthogonal multiple access uplink transmission method

A technology of non-orthogonal multiple access and transmission method, which is applied in the field of non-orthogonal multiple access uplink transmission of airborne array communication, and can solve the problems such as the inability of microwave frequency band to meet the communication needs and the limited traditional spectrum resources.

Inactive Publication Date: 2019-02-15
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In air-to-air communication, traditional spectrum resources are very limited, and the available microwave frequency band can no longer meet the communication needs

Method used

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  • Airport array communication non-orthogonal multiple access uplink transmission method
  • Airport array communication non-orthogonal multiple access uplink transmission method
  • Airport array communication non-orthogonal multiple access uplink transmission method

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Embodiment Construction

[0082] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0083] The invention relates to a non-orthogonal multiple access uplink transmission method for air-to-air array communication, which adopts a non-orthogonal multiple-access mode in an uplink millimeter-wave air-to-air communication system, and jointly designs power allocation and analog beam assignment. Shaped method; taking the uplink transmission of the ground base station to the air base station as an example, the effective channel gains of each air base station are sorted, the higher the channel gain, the higher the priority, and the corresponding transmission signals are sent on the same resource block For the ground base station, the ground base station uses the serial interference cancellation (SIC) method to decode, and the space-based signal with high power is decoded first and eliminated in the received mixed signal, and then decodes the res...

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Abstract

The invention discloses an airport array communication non-orthogonal multiple access uplink transmission method, and belongs to the technical field of the airport communication. The method comprisesthe following steps: firstly constructing a communication scene, performing millimeter wave directional communication between a ground base station and each airport base station to obtain a channel response vector; selecting the channel response vector on the strongest path of the airport base station as the effective channel response vector hi of the ground base station and the airport base station I; ranking effective channel gains as shown in description of various airport base stations by using the beamforming vector w; for the effective channel gain ranking as shown in description, preferably decoding and removing a transmitting signal s1 by the ground base station, and then decoding the transmitting signal s2 to obtain an achievable rate of each airport base station; when the sum ofthe achievable rates achieve the maximum, designing a constraint condition needing to be satisfied by joint optimal power control and beamforming; solving the constraint condition to obtain power distribution corresponding to each airport base station and a beamforming scheme of the ground base station. The spectrum efficiency is effectively improved, the computation complexity is low, and the fast beamforming and power control are realized.

Description

technical field [0001] The invention belongs to the technical field of air-to-air communication, in particular to a non-orthogonal multiple access uplink transmission method for air-to-air array communication. Background technique [0002] In recent years, the application and development of airport communication has attracted the attention of countries all over the world. Airborne communications include near-space communications and low-altitude communications. At a height of 20km-100km, an airship or a large UAV is used as an air base station, and at a low altitude below 20km, a UAV is used as an air base station to realize the connection between a ground base station and a remote user. The use of air-to-air aircraft for air-to-air communication can effectively supplement and improve the existing communication system. Due to the good maneuverability and stability of air-to-air aircraft, air-to-air communication can achieve communication coverage in remote areas and rapid r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/185H04B17/391
CPCH04B7/0617H04B7/1851H04B17/391Y02D30/70
Inventor 肖振宇曹先彬罗喜伶刘凯
Owner BEIHANG UNIV
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