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Resource allocation method of multi-carrier NOMA system

A resource allocation, multi-carrier technology, applied in electrical components, wireless communication, etc., can solve the problems of high computational complexity, low complexity, and unsatisfactory system performance, and achieve the effect of excellent throughput performance

Inactive Publication Date: 2021-06-04
ZHENGZHOU UNIV
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Problems solved by technology

The characteristics of the current matching algorithms are mainly summarized into two categories: one is good matching performance, but the computational complexity is high; the other is random matching with low complexity, but the system performance that such schemes can achieve is often not ideal

Method used

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  • Resource allocation method of multi-carrier NOMA system
  • Resource allocation method of multi-carrier NOMA system
  • Resource allocation method of multi-carrier NOMA system

Examples

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Embodiment 1

[0024] figure 1 It shows a schematic flowchart of a resource allocation method for a multi-carrier NOMA system provided in this example, including the following steps:

[0025] Step 1: Establish the network model of the multi-carrier NOMA system: combine the traditional multi-carrier orthogonal technology with the NOMA system, the system model is as follows figure 2 shown; specifically include the following:

[0026] The multi-carrier NOMA system consists of a base station and N users randomly distributed in the cellular network; the total system bandwidth is B, and it is evenly divided into M bandwidths B sc = Orthogonal subcarriers of B / M, that is, the message delivery process between multiplexed users on each subcarrier does not interfere with each other; the index set of all subcarriers can be expressed as k m Indicates the number of users multiplexed on the mth subcarrier, and Further, with UE l,m Indicates the lth user multiplexed on the mth subcarrier, l=1,2,......

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Abstract

The invention discloses a resource allocation method of a multi-carrier NOMA systemmulti-carrier NOMA (Non-Orthogonal Multiple Access) system. Under the condition of ensuring the minimum data rate under the constraint of the service quality of users accessed by all systems and the limitation of the total transmitting power of a base station, a mathematical optimization problem taking maximization of the system sum rate as a target is constructed, and an original non-convex problem is split into two main convex sub-problems to be solved respectively. On one hand, a two-step bilateral matching algorithm is provided for scheduling of the users and the subcarriers, and scheduling and matching of the users and the subcarriers in the system can be quickly and effectively completed under the condition that the system performance is guaranteed. on the other hand, for the power distribution problem in the system, on the premise of ensuring that a receiving end can successfully execute a continuous serial interference cancellation (SIC) technology, a closed-form solution of power distribution between subcarrier multiplexing users is deduced, and water injection distribution of residual increment power between subcarriers is completed on the basis of the closed-form solution. According to the method provided by the invention, the throughput performance of the system is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a resource allocation method of a multi-carrier NOMA system. Background technique [0002] In recent years, the continuous upgrading of wireless communication technology has brought profound changes to all aspects of human social life. At the same time, with the rapid development of the Internet of Things and the fifth-generation mobile communication technology, the future wireless communication technology is also facing more and more severe challenges. In addition to indicators such as low latency, mobility, and reliability, its demand for large capacity has become extremely significant. [0003] As a prominent radio technology, non-orthogonal multiple access (NOMA) mainly enables the transmitting end to simultaneously superimpose and transmit information of multiple users in the same frequency domain through power multiplexing, and has high spectral ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04W72/54
CPCH04W72/0453H04W72/0473H04W72/53H04W72/543H04W72/542
Inventor 朱政宇吕亚培王梓暄孙钢灿郝万明刘沛佳郭亚博林宇陈鹏飞申凌峰
Owner ZHENGZHOU UNIV
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