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Power distribution method and device in non-orthogonal multiple access

A technology of non-orthogonal multiple access and allocation method, applied in the field of wireless access, can solve the problem that the performance of FTPA algorithm needs to be improved, etc.

Active Publication Date: 2016-06-22
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although FTPA has the advantages of both FSPA and FPA, it can achieve high throughput performance, and the calculation amount and time complexity are acceptable, but FTPA can achieve better results when the number of multiplexing users is 2, but when When the number of multiplexing users is greater than 2, the performance of the FTPA algorithm needs to be improved

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  • Power distribution method and device in non-orthogonal multiple access
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Embodiment Construction

[0086] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0087] In the embodiment of the present invention, the number of transmitting antennas of the base station is N t = 1, the number of receiving antennas of the user equipment is N r = 2, the total system bandwidth is divided into N C subbands, the bandwidth of each subband is W, in any subband b(1≤b≤N C ) The number of non-orthogonal multiplexing users is m, is the set of m user groups selected by the user pairing algorithm, where Indicates the serial number o...

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Abstract

An embodiment of the invention discloses a power distribution method and device in non-orthogonal multiple access. In the method, average speed of each user on any sub band is calculated according to the bandwidth of the sub band, a channel gain of each user, power distributed at the previous moment and window time length, and the weight of each user is calculated according to the average speed of each user; according to a preset criterion, all user groups suitable for non-orthogonal multiple access are paired, for each first user group in a set to be selected, a proportional fairness factor of each first user group is calculated, and the first user group with the largest proportional fairness factor is determined to be the optimal user group; and the sub band is allocated to the optical user group, simultaneous access of multiple users to a same wireless resource is realized, throughput of a system is considered, and complexity of an algorithm is lowered.

Description

technical field [0001] The present invention relates to the field of wireless access technology, in particular to a power allocation method in non-orthogonal multiple access. Background technique [0002] In order to meet future business needs, the industry has initiated research on 5G mobile communication systems. In order to meet the high throughput rate (1000 times higher than 4G, the data rate in hotspot areas reaches 10Gbps), massive device access (10-100 times higher than 4G, a total of 50 billion devices, an average of 300,000 devices per access point ) and other indicators, non-orthogonal multiple access technology (NOMA) came into being. In the traditional orthogonal multiple access technology, only a single wireless resource can be allocated to a user, such as by frequency division, time division or codebook division, while the NOMA method can allocate one wireless resource to multiple users. [0003] At present, there are many ways to realize NOMA. The realizati...

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Application Information

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IPC IPC(8): H04W72/04
CPCH04W72/0473H04W72/20
Inventor 赵龙梅杰龙航郑侃
Owner BEIJING UNIV OF POSTS & TELECOMM