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5G downlink NOMA transmission method in incomplete master user interference information

A technology for interfering information and downlink, applied in wireless communication, power management, electrical components and other directions, can solve the problems of system dynamic interference, inability to match channel state, CQI mismatch, etc., to achieve the effect of improving interrupt performance

Pending Publication Date: 2020-06-02
BEIJING BLUE SATELLITE COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, most studies have focused on the ideal state where the ST obtains complete channel information, and the CQI mismatch phenomenon will cause severe performance degradation
[0003] However, in the cognitive system scenario, the intermittent transmission of the primary user PT usually leads to the dynamic disturbance of the system
Therefore, the channel quality information CQI message received by the base station BS may be outdated and cannot match the actual channel state
And during transmission, mismatching CQI can lead to severe performance degradation

Method used

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  • 5G downlink NOMA transmission method in incomplete master user interference information
  • 5G downlink NOMA transmission method in incomplete master user interference information
  • 5G downlink NOMA transmission method in incomplete master user interference information

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Embodiment 1

[0018] A 5G downlink NOMA transmission method in incomplete primary user interference information, comprising the following steps:

[0019] A. Secondary source users perceive primary user interference;

[0020] B. Judging channel quality information based on primary user interference;

[0021] C. Allocating power allocation coefficients to secondary purpose users according to the channel quality information;

[0022] D. Perform NOMA transmission according to the power allocation coefficient.

[0023] On the basis of the existing technology, the secondary user perceives the interference of the cognitive PT, that is, the PT adapts to NOMA transmission according to the actual channel quality after obtaining the channel state information and feedback from the base station, and the PT continues to transmit stably, improving the NOMA transmission performance and improve transmission efficiency.

Embodiment 2

[0025] Based on the principle of embodiment 1, such as figure 1 As shown, this embodiment uses two secondary users as an example to illustrate the method.

[0026] The Underlay transmission model based on NOMA in the cognitive radio network includes authorized primary user transmission network and secondary transmission network, specifically including a primary source user PT, a secondary source user ST, a primary destination user PD, two Secondary destination users U1 and U2. Primary source user PT transfer data x P to its main destination user PD; the secondary source user ST assists in the transmission of superimposed data x through NOMA technology S to the secondary receiver U 1 and U 2 . The working mode of each node is half-duplex decoding and forwarding. As shown in the figure, the primary user will interfere with the secondary user and the relay transmission network, and similarly, the secondary user transmission network will also interfere with the primary user ...

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Abstract

The invention discloses a 5G downlink NOMA transmission method in incomplete master user interference information. The method comprises the following steps: A, by a secondary source user, sensing master user interference; B, judging channel quality information according to the main user interference; C, allocating a power allocation coefficient to a secondary target user according to the channel quality information; and D, performing NOMA transmission according to the power distribution coefficient. The secondary system acquires accurate channel information by sensing the interference of the primary user, so that a proper power distribution coefficient is distributed to the secondary target user, optimal SIC sequence recovery information is acquired, the parameters of the system are adjusted in time, and the interruption performance of the secondary user is improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically relates to a 5G downlink NOMA transmission method in incomplete primary user interference information. Background technique [0002] In recent years, the non-orthogonal multiple access technology NOMA and mobile edge computing MEC have been introduced into the narrowband Internet of Things system NB-IoTs, which greatly improves the efficiency of transmission and computing. Among them, NOMA technology allows multiple users to access the same channel at the same time, showing great potential in reducing system delay. The efficiency of the NOMA downlink system depends to a large extent on the accuracy of the channel state information CSI of the transmitter / base station, so the base station can determine the correct SIC sequence through the rate allocation between users and users, so as to obtain the expected data . In actual cognitive scenarios, research ...

Claims

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Application Information

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IPC IPC(8): H04W52/24
CPCH04W52/241H04W52/243
Inventor 兰峰
Owner BEIJING BLUE SATELLITE COMM TECH