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Joint beam forming and power control method for interference of 5G base station to satellite user

A technology of beamforming and power control, which is applied in the field of satellite communication, can solve problems such as spectrum sharing and co-channel interference, and achieve the effect of meeting the interference threshold requirements, small interference, and ensuring service quality

Pending Publication Date: 2022-01-14
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of co-channel interference when satellite-5G integrated equipment directly accesses the spectrum in the network, and provides a joint beamforming and power control method for 5G base station interference with satellite users

Method used

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  • Joint beam forming and power control method for interference of 5G base station to satellite user
  • Joint beam forming and power control method for interference of 5G base station to satellite user
  • Joint beam forming and power control method for interference of 5G base station to satellite user

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specific Embodiment approach 1

[0063] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the method for joint beamforming and power control of 5G base station interference to satellite users described in this embodiment, which includes:

[0064] S1. Use beamforming technology to build a satellite-5G integrated network model to obtain the interference threshold of satellite users;

[0065] S2. Construct a game model according to the quantified feedback channel state information according to the interference threshold of the satellite user obtained in S1;

[0066] S3. Introduce the adjustment step size and combine the beamforming vector to obtain the optimal beam control power;

[0067] S4. Obtain the optimal transmission power of the 5G base station according to the water injection power allocation principle;

[0068] S5. Using the principle of zero-forcing beamforming to obtain the system capacity of 5G users based on different feedback rates;

[0069] S6. A co...

specific Embodiment approach 2

[0074] Specific implementation mode two: the following combination figure 1 Describe this embodiment. This embodiment will further explain Embodiment 1. The satellite-5G integrated network model constructed in S1 includes: a low-orbit satellite, a satellite user, a 5G base station, and multiple 5G users;

[0075] 5G base station adopts beamforming technology with N t An antenna, satellite users and 5G users each have an antenna;

[0076] Both satellite users and 5G users can estimate and obtain their own channel state information;

[0077] 5G users can feed back channel state information to 5G base stations;

[0078] Satellite users can send the quantified feedback channel state information to the 5G base station, and the 5G base station will use the received uplink channel state information as feedback.

[0079] Further, the specific method for obtaining the interference threshold of satellite users described in S1 is:

[0080] S1-1. Quantify the feedback channel state in...

specific Embodiment approach 3

[0087] Specific implementation mode three: This implementation mode further explains implementation mode two. The specific method for constructing a game model according to the quantified feedback channel state information described in S2 includes:

[0088] According to the game goal under perfect feedback channel state information, increase the number of quantized bits of channel state information, and obtain quantified feedback channel state information to construct a game model;

[0089] The game goal under the perfect feedback channel state information is to optimize the transmit power of the 5G base station so that the interference received by satellite users is minimized;

[0090] The constraints to be met at the same time are: the signal-to-interference-plus-noise ratio received by 5G user k is greater than the threshold value β k , the interference of 5G base stations to satellite users is lower than the interference threshold I of satellite users with perfect channel ...

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Abstract

The invention discloses a joint beam forming and power control method for interference of a 5G base station to satellite users, belongs to the technical field of satellite communication, and aims to solve the problem of same-frequency interference when satellite-5G integrated equipment is directly accessed to a network for spectrum sharing. The method comprises the following steps: constructing a satellite-5G integrated network model by adopting a beam forming technology, and obtaining an interference threshold of a satellite user; constructing a game model according to quantized feedback channel state information; introducing an adjustment step length, and obtaining optimal beam control power in combination with a beam forming vector; obtaining optimal transmitting power of a 5G base station according to a water injection power distribution principle; adopting a zero-forcing beam forming principle to obtain system capacities of 5G users based on different feedback rates; and introducing a cost function, and taking a Nash equilibrium condition of a game theory as a target to obtain a model of joint interference power control and feedback rate control. The invention is used for the communication of a satellite-5G integrated network.

Description

technical field [0001] The invention relates to a joint beamforming and power control method aiming at the interference of 5G base stations on satellite users, and belongs to the field of satellite communication. Background technique [0002] With the development of satellite communication technology towards broadband and all-IP, the satellite mobile communication system is trying to carry out an integrated design with the terrestrial cellular network, so as to combine the most beneficial parts of each, which is an important trend in the development of the next generation of mobile communication technology. Therefore, the integration of satellite systems and terrestrial 5G systems has become a hot spot in the new round of research on satellite-ground integrated networks. [0003] Satellite communication systems can extend and supplement terrestrial networks in unserved or underserved areas. These evolved satellite systems will serve as satellite radio access networks and be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/06H04B7/0426H04W52/24H04W52/42
CPCH04B7/18532H04B7/18543H04B7/0617H04B7/0426H04W52/244H04W52/42
Inventor 杨明川苗欣欣焦利彬谢冰玉刘艺璇窦映喆薛冠昌
Owner HARBIN INST OF TECH
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