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Transmission signal compensation method, network side equipment and terminal

A network-side device, a technology for transmitting signals, applied in the field of communication, can solve the problems of poor transmission effect of transmission signals, and achieve the effect of improving the transmission effect

Active Publication Date: 2021-12-21
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a transmission signal compensation method, network side equipment and terminal to solve the problem of relatively poor transmission effect of transmission signals during multi-satellite or satellite-ground multi-point coordinated transmission

Method used

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  • Transmission signal compensation method, network side equipment and terminal
  • Transmission signal compensation method, network side equipment and terminal
  • Transmission signal compensation method, network side equipment and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0152] As an optional implementation, the method also includes:

[0153] The network side device sends the first compensation parameter to the terminal.

[0154] Since the first compensation parameter is sent to the terminal, the workload of the terminal can be reduced, because after receiving the compensation parameter, the terminal can directly use it without further relevant calculation.

[0155] As an optional implementation manner, the reference transmission link is a transmission link between the terminal and a second satellite; or

[0156] The reference transmission link is a transmission link between the terminal and a ground base station.

[0157] Wherein, the above-mentioned second satellite can be any satellite except the above-mentioned first satellite,

[0158] In addition, the reference transmission link is the transmission link between the terminal and the second satellite, which can be applied to the scenario where multiple satellites serve the above-mentione...

Embodiment 1

[0239] In this embodiment, the following timing and frequency compensation methods are illustrated as examples:

[0240] Option 1: Collaborative transmission between planets

[0241] For inter-satellite cooperative transmission, in order to keep the Doppler offset of multiple transmission links arriving at the terminal consistent with the time point, the network side can additionally perform pre-compensation. When used in low-orbit communication, the Doppler shift is proportional to the moving speed of the satellite, which is relatively large and requires Doppler frequency shift pre-compensation. In high-orbit satellite communication, the satellite does not move relative to the ground, and its Doppler shift is not considered.

[0242] Such as Figure 5 As shown, the transmission delays from satellite 1 and satellite 2 to the terminal are different, and for low-orbit satellites, the Doppler shift is also different, Doppler shift fd=fc*v*cos(a), v is the speed of light, fc is...

Embodiment 2

[0248] In this embodiment, the uplink timing and frequency compensation are described as examples

[0249] Figure 7 Provide a schematic diagram of the reference point of the transmission link. For example, for bent-pipe satellite communication and regenerative satellite communication, if relative compensation is used, the terminal only compensates the timing advance of the terminal’s transmission delay deviation*2 relative to the reference point, and the network The side compensates the timing advance of the transmission delay deviation*2 from the reference point to the ground base station or satellite. If it is full compensation, the terminal needs to compensate all timing advances in the link, which is equal to twice the transmission delay. Similarly, Doppler offset compensation is also based on the reference point. When relative Doppler compensation is used, the terminal compensates for the Doppler offset relative to the reference point. For all Doppler compensation, the ...

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Abstract

The invention provides a transmission signal compensation method, network side equipment and a terminal. The method comprises the following steps: the network side equipment acquires a reference compensation parameter of a reference transmission link of the terminal; the network side equipment determines a first compensation parameter of a first transmission link according to the reference compensation parameter, and the first transmission link is a transmission link between the terminal and a first satellite; and the network side equipment performs sending or receiving compensation on a transmission signal of a first transmission link according to the first compensation parameter. According to the invention, the transmission effect of transmission signals is improved.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular to a transmission signal compensation method, network side equipment and a terminal. Background technique [0002] At present, multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) transmission technology or cooperative transmission technology is only applicable to fixed transmission points, for example, MIMO or cooperative transmission is implemented between a terminal and multiple base stations. However, with the development of communication technology, in satellite communication, multiple satellites can also provide data services for a terminal to effectively increase the capacity of data transmission, but the distance between different satellites and terminals is different, resulting in multiple satellites or satellite-ground ( For example: when the satellite and the ground base station provide data services for the same terminal) when the mult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/0413H04B7/024
CPCH04B7/18513H04B7/18519H04B7/0413H04B7/024H04W56/0035H04W56/0045H04B7/0671H04W72/23
Inventor 缪德山孙韶辉康绍莉
Owner DATANG MOBILE COMM EQUIP CO LTD