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Secondary user strong excitation power distribution method based on cooperative NOMA and cooperative spectrum sharing

A secondary user and allocation method technology, applied in the field of communication systems, can solve problems such as user behavior contradictions, achieve the effects of increasing the total rate, improving spectrum efficiency, and solving user interest conflicts

Active Publication Date: 2019-10-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of NOMA technology is to perform non-orthogonal multiplexing on different user-related communication resources, and use SIC for demodulation at the receiving end, so that more users can share the current communication resources and improve the overall spectrum efficiency of the system. The introduction of the resource allocation must have certain user behavior contradictions

Method used

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  • Secondary user strong excitation power distribution method based on cooperative NOMA and cooperative spectrum sharing
  • Secondary user strong excitation power distribution method based on cooperative NOMA and cooperative spectrum sharing
  • Secondary user strong excitation power distribution method based on cooperative NOMA and cooperative spectrum sharing

Examples

Experimental program
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Effect test

Embodiment 1

[0087] A secondary user strong incentive power allocation method based on cooperative NOMA and cooperative spectrum sharing, operating in a multi-user relay communication system based on cooperative NOMA, such as figure 1 As shown, the multi-user relay communication system based on cooperative NOMA includes a primary user system and a secondary user system. The primary user system refers to the primary user PU. The primary user PU includes a primary transmitter PT and a primary receiver PR. The user system includes K secondary users SU, and each secondary user SU includes a transmitter and a receiver, forming a transmitter-receiver pair, denoted as ST k -SR k , the primary user PU is always in the communication state;

[0088] The primary user PU has the right to use the access bandwidth, but the channel condition for direct transmission between the PT and the PR is poor. On the other hand, each SU wants to get spectrum access time to send its own signal. But the primary us...

Embodiment 2

[0152] According to Embodiment 1, a secondary user strong incentive power allocation method based on cooperative NOMA and cooperative spectrum sharing, the difference is that: in order to maximize the throughput of the entire system, select the secondary user SU that maximizes the sum rate select As a relay, the purpose of improving the overall system performance can be achieved, as shown in formula (XVII):

[0153]

[0154] In the formula (XVII), κ={1, 2, ..., K} represents the set of K secondary users who can be selected as relays, Refers to the utility value obtained by the primary user PU when the kth secondary user is selected as the relay, refers to the utility value obtained by the secondary user SU when the kth secondary user is selected as the relay.

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Abstract

The invention relates to a secondary user strong excitation power distribution method based on cooperative NOMA (Non-Orthogonal Multiple Access) and cooperative spectrum sharing, which maximizes the transmission rate of an SU (Subscriber Unit) serving as a relay by optimizing a power distribution factor of NOMA transmission of a secondary user. According to the method, the total rate of the primary user PU and the secondary user SUs can be effectively improved, the spectral efficiency of the system is improved, more secondary user SUs can be stimulated to serve as forwarding relays of the primary user PU at the same time, and the problem of user benefit contradiction between the primary user PU and the secondary user SUs is solved.

Description

technical field [0001] The invention relates to a secondary user strong excitation power allocation method based on cooperative NOMA (non-orthogonal multiple access technology) and cooperative spectrum sharing, and belongs to the technical field of communication systems. Background technique [0002] With the emergence of 5G, the number of mobile devices has increased sharply, and the demand for user access has increased exponentially. However, spectrum resources have become very scarce nowadays. Therefore, the scarcity of spectrum resources and the increasing demand for speed of users have become Now there is a pair of main contradictions in the strategic design of the communication system. [0003] Cooperative spectrum sharing techniques are a promising approach to address spectrum scarcity in wireless communications and have attracted increasing research interest from both industry and academia. In the cooperative spectrum sharing system, a secondary user (SU) without a ...

Claims

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Application Information

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IPC IPC(8): H04W24/02H04W40/22H04W72/04
CPCH04W24/02H04W40/22H04W72/0473Y02D30/70
Inventor 周晓天文玉杰张海霞袁东风
Owner SHANDONG UNIV