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Frequency and power distributing method based on NOMA (non-orthogonal multiple access) system

An allocation method and power technology, applied in the field of mobile communications, can solve problems such as immature technology, achieve the effects of increasing practicality, improving energy efficiency and spectrum utilization, and reducing complexity

Active Publication Date: 2015-05-20
CERTUS NETWORK TECHNANJING
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Problems solved by technology

[0005] Since it is still in the initial stage of 5G technology research, many protocols have not yet been standardized, and related technologies are not very mature. Some research institutions are verifying and optimizing various candidate solutions, based on frequency reuse and optimal power The research on distributed non-orthogonal multiple access (NOMA) technology needs to be continuously improved, such as how to reduce complexity, reduce transmission power, and optimize modulation and coding selection (MCS) without affecting system capacity. These are the directions worthy of further research

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  • Frequency and power distributing method based on NOMA (non-orthogonal multiple access) system
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  • Frequency and power distributing method based on NOMA (non-orthogonal multiple access) system

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[0029] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] figure 1 It is a schematic flow chart of the method of the present invention, as shown in the figure, the method mainly includes the following steps:

[0031] Step A, confirming the user set that the base station will send information to the cell. In step B, the base station acquires the CSI of the user set. Step C, allocating each sub-channel to the user with the best CSI condition. Step D, using the interior point method to select an optimal user to be superimposed on each sub-channel. Step E, performing optimal power allocation to two users on each sub-channel respectively.

[0032] Each step is described below through a specific embodiment.

[0033] Step A: Confirm the user set that the base station side will send information to the cell.

[0034] see figure 2 , is a typical wireless mobile communication network model. I...

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Abstract

The invention relates to a frequency and power distributing method based on an NOMA (non-orthogonal multiple access) system. The frequency and power distributing method comprises the following steps: confirming a user set for sending information to a cell by a base station and obtaining CSI (channel state information) of the user set at a base station end; distributing each sub channel to a user with the best CSI condition, and regarding the user as a strong user; based on this, combining the strong user with other users in sequence, calculating a maximum channel capacity value of each pair of sets, selecting one pair of set with maximum channel capacity value, and regarding another user in the set as a weak user; distributing two users which are respectively the strong user and the weaker user on each sub channel, wherein the set comprising the strong user is a strong user set Omega A, and the set comprising the weak user is a weak user set Omega B; performing optimal power distribution on the strong user and the weak user on each sub channel respectively. The method can meet large-scale user transmission needs in the future, and increases access probability of the user, so that the spectrum efficiency of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a frequency and power allocation method based on a NOMA (Non-orthogonal Multiple Access) system. Background technique [0002] In recent years, mobile communication technology has developed by leaps and bounds, which has greatly changed people's production and life. However, with the passage of time, people will also put forward higher requirements for the quality of communication. The next generation of mobile communication (5G) has already Entering the formal research stage, the research mainly focuses on how to improve spectrum utilization and system capacity. [0003] Due to the scarcity of frequency resources, wireless access technology has always been a hot research topic in small cell communication systems. In the third generation mobile communication system, the code division multiple access (CDMA) technology based on spread spectrum is adopted. In the fourth-...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04W72/0453H04W72/0473Y02D30/70
Inventor 唐伦刘青海李昕韵李茹洁陈前斌
Owner CERTUS NETWORK TECHNANJING
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