Wireless energy collection non-orthogonal multiple access system resource allocation method

Abstract

The invention provides a wireless energy collection non-orthogonal multiple access system resource allocation method, which is suitable for a scene that a base station and a remote user with poor channel conditions are not in direct communication in a downlink cooperative non-orthogonal multiple access system, and only a near user with better channel conditions can be used as a relay to communicate with a remote user with poor channel conditions. According to the method, a signal of a remote user is also sent to a near user by using a non-orthogonal multiple access technology, and the near user serves as a relay to forward the signal to the remote user. According to the method, a near user uses a power segmentation technology to carry out energy collection and information decoding at the same time. The minimum transmission data volume requirement of remote users, the base station transmission power limitation and the energy causal constraint are met, and a resource allocation model is constructed by taking the maximization of the near user transmission data volume as a target, and optimal allocation on the power, the time, the non-orthogonal multiple access power allocation proportion and the energy collection power division proportion in the cooperative non-orthogonal multiple access system are performed.

Description

Technical field [0001] The invention relates to the technical field of wireless communication, in particular to a resource allocation method for a wireless energy collection non-orthogonal multiple access system. Background technique [0002] In recent years, with the rapid development of wireless communication technology and the large-scale popularization of mobile terminal equipment, the business demand of users has increased sharply. Therefore, it is necessary to introduce new multiple access technologies in the upcoming fifth-generation wireless network. Non-orthogonal multiple access technology introduces a new dimension on the basis of existing time-frequency resource blocks to perform multiplexing, thereby improving the frequency utilization of wireless networks. The basic idea of ​​non-orthogonal multiple access technology is to multiplex channels in the power domain, so as to serve multiple users at the same frequency and time. At the transmitting end, non-orthogonal mu...

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Problems solved by technology

However, the existing studies all assume that there is a direct communication link between the remote user and the base station, and there is no relevant research on a special situation where there is no direct communication between the base station and the remote user with poor channel conditions.

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