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Multi-relay opportunity beam forming method

A beamforming and opportunistic technology, applied in diversity/multi-antenna systems, advanced technology, space transmit diversity, etc., can solve problems such as performance saturation and users being unable to receive data

Active Publication Date: 2021-09-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Description
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Problems solved by technology

[0005] However, traditional opportunistic beamforming systems suffer from performance saturation when the number of users reaches saturation
On the other hand, if the user channel at the receiving end is a deep fading channel, it may cause the user to be unable to receive the data from the sending end

Method used

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Embodiment Construction

[0061] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0062] In order to solve the problems of performance saturation of the opportunistic beamforming system and poor signal of users in deep fading channels, the present invention proposes a multi-relay opportunistic beamforming system. The signal sent by the transmitter is amplified by the relay and forwarded to the user at the receiver , which can improve the performance saturation point of the opportunistic beamforming system. Before transmitting data, the system will select the optimal relay and optimal user according to the information fed back by the user, and then transmit the information. In the transmission process, in order to maximize the reachable rate of the system, it is necessary to reasonably schedule the power allocated to the relay and the power allocated to the user. The present invention obtains the optimal power distribution through the ...

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Abstract

The invention discloses a multi-relay opportunity beam forming method. A signal sent by a transmitting end is amplified through relays and forwarded to a user of a receiving end; before data transmission, the system selects an optimal relay and an optimal user according to information fed back by the user, and then information transmission is carried out; in the transmission process, in order to maximize the reachable rate of the system, the system reasonably dispatches the power allocated to the relay and the power allocated to the user. According to the method, the performance saturation point of the system is improved, the situation that a user at a receiving end cannot receive data can be better avoided, the communication performance of the system is improved, the reachable rate in the system reaches the maximum, and high-speed communication is achieved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a beamforming method. Background technique [0002] Wireless communication refers to the long-distance transmission communication between multiple nodes that does not propagate through conductors or cables. A lot of research has been done on it, such as beamforming, precoding, multiple access and so on. Most of the research requires complete channel state information preprocessing on the transmitted signal. When the transmitter cannot obtain the channel state information of the receiver, the system performance will drop rapidly. To address the problem of performance degradation, the theory of opportunistic beamforming is proposed. [0003] Opportunistic beamforming is a transmission preprocessing scheme that multiplies random weights by the transmission signal from the base station to the user, thereby inducing large and fast fluctuations in the user...

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Application Information

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IPC IPC(8): H04B7/155H04B7/06
CPCH04B7/15535H04B7/15542H04B7/0617H04B7/0626H04B7/0632Y02D30/70
Inventor 孙文彬周睿哲杨欣王伶韩闯宫延云张兆林粟嘉谢坚陶明亮汪跃先范一飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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