Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for resisting pilot pollution

A pilot pollution and pilot signal technology, applied in the field of anti-pilot pollution, can solve the problems of decreased communication throughput, interference between data transmission users, and reduced communication system throughput, so as to improve communication throughput and reduce pilot frequency. The effect of pollution

Inactive Publication Date: 2019-03-01
INST OF COMPUTING TECH CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual massive MIMO deployment, the number of configurable antennas in the base station is limited, usually ranging from dozens to hundreds. Errors caused by channel estimation will cause strong inter-user interference in data transmission, resulting in a decrease in communication throughput. decline
In the time-shifted pilot transmission architecture of the third method, when the number of antennas is limited, the interference between the superimposed data and the pilot cannot be ignored, and channel estimation errors will eventually lead to a decrease in communication throughput.
[0010] In summary, the existing anti-pilot pollution schemes cannot significantly reduce the pilot interference under the condition of limited number of antennas, thus reducing the throughput of the communication system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for resisting pilot pollution
  • Method for resisting pilot pollution
  • Method for resisting pilot pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention will be further described in detail through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] figure 1 A network composed of three cells is illustrated to describe the transmission architecture proposed by the present invention. The transmission architecture defines the channel estimation between base stations, channel estimation between base stations and users, and the timing relationship of data transmission. Among them, T BS is the time period, T BS_P Indicates the length of time used for channel estimation between base stations, T c Indicates the time length of a time-shifted pilot transmission subframe, each T c The time length τ used to calculate the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for resisting pilot pollution. The method comprises the following steps: a base station obtains a channel estimation value with other base stations according to pilot signals transmitted by other base stations; a channel estimation value between the base station and a user terminal is calculated for multiple continuous time-shifted pilot subframes, wherein the basestation utilizes the obtained channel estimation value with other base stations to eliminate data interference from other base stations. An interference elimination method is adopted in a channel estimation stage between a user and the base station, and the influence of downlink data signals is eliminated by means of the obtained channel estimation value among the base stations, so the pilot pollution is remarkably reduced and the throughput is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for resisting pilot pollution. Background technique [0002] Massive Multiple-Input Multiple-Output (Massive Multiple-Input Multiple-Output, Massive MIMO), also known as massive multiple-antenna, refers to a transmission mechanism in which the number of antennas configured by the base station is much larger than the total number of antennas serving users. Effectively improving spectrum efficiency while reducing power consumption is expected to play an important role in future fifth-generation mobile communication systems. According to different transmission mechanisms, Massive MIMO can be divided into Time Division Duplexing (Time Division Duplexing, TDD) mode and Frequency Division Duplexing (Frequency Division Duplexing, FDD) mode. In the FDD mode, the uplink and downlink channels are completely different, and channel estimation needs to be performed se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/0413H04B17/345H04L25/02
CPCH04B7/0413H04B7/0421H04B17/345H04L25/0242
Inventor 孙布勒周一青田霖石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI