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Power adjustment method and system in a mimo-noma system

A technology of MIMO-NOMA and power adjustment, which is applied in the field of power adjustment methods and systems, can solve problems such as difficult application, large error of power adjustment methods, and failure of receivers to demodulate signals correctly, so as to improve spectrum efficiency and increase access capacity Effect

Active Publication Date: 2020-12-29
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0005] However, the existing power adjustment methods in the MIMO-NOMA system are mainly based on the current channel conditions, using preset formulas or graph theory and other mathematical methods to theoretically calculate the power allocated to each user. Although this power adjustment method is simple , but it is difficult to apply in actual engineering development, and when the uplink and downlink channel estimation is inaccurate, the error of this power adjustment method is large, which may make the receiver unable to correctly demodulate the corresponding user's signal

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  • Power adjustment method and system in a mimo-noma system
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  • Power adjustment method and system in a mimo-noma system

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specific Embodiment

[0058] figure 2 is a schematic flowchart of a power adjustment method in a MIMO-NOMA system provided by an embodiment of the present invention, as shown in figure 2 As shown, the method includes:

[0059] 101. Determine the downlink initial power of each user on each RE according to the downlink power per RE and the path loss of each user;

[0060] In the NOMA-MIMO system, each RE is multiplexed by multiple users. The 3GPP protocol does not stipulate how to allocate the downlink power of different users per RE. The embodiment of the present invention uses two users per RE as an example to illustrate how to The downlink power of two users in each RE is allocated.

[0061] In the 3GPP protocol, the downlink power per RE is set to P RE , where N BS is the base station antenna, is the power per RE of a downlink single antenna, in, is the maximum transmit power of the base station, Δf is the carrier spacing, is the number of downlink RBs, is the number of carriers p...

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Abstract

MIMO- The invention discloses a power adjustment method and system in a MIMO-NOMA system. The method comprises the following steps: determining downlink initial power of each user on each RE accordingto downlink RE power and path loss of each user; and adjusting the downlink initial power of each user according to the received CQI reported by each user. The downlink power distribution of each user meets the demodulation requirement of the user receiver, so that the user can demodulate the signal, the spectrum efficiency of the system is improved, and the access capacity of the system is increased.

Description

technical field [0001] The invention belongs to the field of mobile communication, and in particular relates to a power adjustment method and system in a MIMO-NOMA system. Background technique [0002] With the popularization and application of smart terminals and the continuous growth of demand for new mobile services, the demand for wireless transmission rates is increasing exponentially, providing a broader application prospect for 5G. Compared with 4G, 5G will greatly improve spectral efficiency, transmission rate and system capacity, and achieve sustainable development of mobile communication networks. [0003] The emergence of each generation of mobile communication systems is accompanied by the innovation of multiple access technology. NOMA (non-orthogonal multiple access technology) changes the power domain from single-user exclusive to multi-user sharing, thereby greatly improving spectrum efficiency, so NOMA has become one of the key technologies in 5G; MIMO (Mult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0426H04W52/14H04W52/24
CPCH04B7/0426H04W52/143H04W52/24H04W52/241H04W52/242
Inventor 徐顺清石晶林张宗帅龙隆李光远
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI