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Power distribution method based on MIMO-NOMA short packet transmission

A technology of MIMO-NOMA and allocation method, which is applied in the field of wireless communication, can solve the problems of not considering user fairness, long delay of remote users, and small effective throughput of remote users

Inactive Publication Date: 2019-11-22
MINZU UNIVERSITY OF CHINA
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Problems solved by technology

[0004] At present, there are many studies on reducing transmission delay by using short packet transmission, but there are few studies on MIMO-NOMA systems; none of the existing studies considers the fairness between user pairs, and ignores the effectiveness of distant users. The throughput is small, which makes the problem of long-distance user delay

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  • Power distribution method based on MIMO-NOMA short packet transmission
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Embodiment Construction

[0046] MIMO-NOMA technology can increase the number of device connections and effectively improve the spectrum efficiency of the system. For ultra-reliable and low-latency application services that require short packet transmission, the multi-user cluster MIMO-NOMA system has a relatively low throughput for COSCO users in the same cluster. In this study, the singular value decomposition and maximum ratio combining methods are used to eliminate inter-cluster interference. Considering that the block error probability of near users decoding far users is lower than a given threshold, an alternate iterative algorithm is used to jointly optimize the transmission of intra-cluster users. Power and maximum achievable transmission rate to maximize the throughput of far-users. The simulation results show that compared with the MIMO-OMA system with short packet transmission, the throughput of far users is increased by 32% under the condition that the block error probability is guaranteed t...

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Abstract

The invention discloses a power distribution method based on MIMO-NOMA short packet transmission. According to the method, a short packet transmission related theory is adopted for the first time, andthe remote user communication quality in the MIMO-NOMA system is analyzed; and on the premise of ensuring the communication quality of the near users, the sending power and the maximum reachable transmission rate of the users in the cluster are jointly optimized by utilizing an alternating iterative algorithm, and finally, the power distribution method capable of realizing the maximization of thethroughput of the far users is obtained.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to an optimization method for MIMO-NOMA short packet transmission power allocation. Background technique [0002] With the development of mobile communication, the Internet of Things has become one of the key driving factors for the development of 5G communication, and most applications of the Internet of Things need to meet the requirements of ultra-reliable and low-latency communication. Non-NOMA can serve multiple users at the same time through power multiplexing Provide services, improve system throughput, and provide great potential for ultra-reliable and low-latency communication. In order to further improve the spectrum efficiency of the system and increase the number of connected devices in the system, a multi-antenna technology of input multiple output (MIMO) is proposed. The combination of MIMO-NOMA technology provides additional degrees of freedom, can reduce interf...

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Application Information

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IPC IPC(8): H04B7/0426H04B7/06H04B7/08H04B7/0456H04W52/14H04W52/24H04W52/26H04W52/34H04W52/42H04W72/04H04W72/08H04W72/00H04W4/06
CPCH04B7/0426H04B7/0617H04B7/086H04B7/0456H04W52/241H04W52/24H04W52/267H04W52/346H04W52/42H04W52/143H04W72/0473H04W4/06H04W72/30H04W72/542
Inventor 冉静学马传连石梦倩
Owner MINZU UNIVERSITY OF CHINA
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