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Estimation method for TD-LTE digital relay downlink channel

A technology of channel estimation and digital relay, which is applied to baseband system components, multi-frequency code systems, etc., and can solve problems such as high complexity

Inactive Publication Date: 2015-06-24
HEBEI UNIV OF TECH +1
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Problems solved by technology

This method overcomes the shortcomings of the high complexity of the existing LTE downlink channel estimation algorithm

Method used

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  • Estimation method for TD-LTE digital relay downlink channel
  • Estimation method for TD-LTE digital relay downlink channel
  • Estimation method for TD-LTE digital relay downlink channel

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Embodiment

[0075] The simulation experiment is carried out by using the LTE digital relay channel estimation method of the present invention.

[0076] using as above figure 1 The LTE digital relay downlink channel estimation operating system. According to the provisions of 3GPP R8 protocol TS36.211 for LTE downlink pilot pattern under dual-antenna configuration, the pilot is extracted. Now, the pilot is extracted from the transmitting antenna 0 and the transmitting antenna 1. The specific steps are that the receiving antenna has synchronized the signal Y 0 The pilot Y is obtained by extracting the pilot of the transmitting antenna 0 p00 , the pilot Y is obtained by extracting the pilot of transmitting antenna 1 p01 , the data Y is received after delay 0 , and then use the LS algorithm to analyze the extracted two-way pilot signal Y p00 and Y p01 Carry out pilot point channel estimation, and for transmitting antenna 0, obtain the pilot point channel characteristics of transmitting an...

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Abstract

The invention discloses an estimation method for a TD-LTE digital relay downlink channel, relates to services or facilities suitable for wireless communication networks, and is the low-complexity estimation method for the downlink channel of an RD-LTE digital relay system. The method comprises the following steps: firstly, selecting community special reference signals from LTE downlink reference signals, and determining an insertion mode of scattered pilot frequency according to the rule of physical layer reference signals by TS36.211 in a 3GPPR8 protocol; and at the relay receiving end, utilizing a recursive least square algorithm to carry out pilot frequency point channel estimation for synchronized orthogonal frequency division multiplexing symbols, then carrying out linear interpolation in a frequency domain so as to obtain the frequency domain channel characteristics, and finally, carrying out the linear interpolation in a time domain so as to obtain the channel characteristics of all data points. The estimation method has the remarkable advantages that the algorithm is relatively simple, has a certain channel time-frequency characteristic tracking ability, and overcomes the high-complexity shortcoming of a current LTE downlink channel estimation algorithm.

Description

technical field [0001] The technical solution of the present invention relates to a service or facility applicable to a wireless communication network, specifically a TD-LTE digital relay downlink channel estimation method. Background technique [0002] With the continuous development of wireless communication technologies, spectrum resources have become extremely tight. To this end, the Third Generation Partnership Project (referred to as 3GPP) has formulated a design goal for high-speed wireless broadband access for Long-Term Evolution (referred to as LTE). This goal is to obtain large broadband spectrum in higher frequency bands according to the existing spectrum allocation scheme. , but the path loss and penetration loss in this frequency band are relatively large, making it difficult to achieve good coverage. If all base stations and the core network are connected in a traditional wired way, it will bring greater deployment difficulty and deployment cost to operators. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 王蒙军冯杰刘剑飞曾祥烨杨建坡
Owner HEBEI UNIV OF TECH
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