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Downlink frequency offset compensation method and repeater used for performing downlink frequency offset compensation

A technology of frequency offset compensation and repeater, which is applied in the field of frequency offset compensation, can solve any problems raised by frequency offset compensation of public channels, and achieve the effect of simple technical solution, simple modification, and simple hardware implementation

Inactive Publication Date: 2011-08-24
TD TECH COMM TECH LTD
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  • Description
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Problems solved by technology

[0004] However, the prior art does not provide any solution for frequency offset compensation of common channels and other channels for which the BBU does not perform frequency compensation

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  • Downlink frequency offset compensation method and repeater used for performing downlink frequency offset compensation
  • Downlink frequency offset compensation method and repeater used for performing downlink frequency offset compensation
  • Downlink frequency offset compensation method and repeater used for performing downlink frequency offset compensation

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0030] In high-speed rail applications, the repeater is used to receive the downlink signal from the remote processing unit (RRU), amplify the downlink signal and forward it to the UE through the transmission channel.

[0031] The main idea of ​​the present invention is: in the downlink time slot that needs to be compensated, the base station inserts a specific signal on a designated secondary carrier of each RRU, the repeater receives the signal, and compares the frequency of the received signal with the The frequency of the specific signal is compared to obtain a frequency error between the two, and then the frequency error is compensated into the transmission channel, thereby realizing frequency offset compensation for the downlink time slot.

[0032...

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Abstract

The invention discloses a downlink frequency offset compensation method which comprises: in a to-be-compensated downlink time slot, a base station inserts a specific signal on a pre-appointed assistant carrier of each RRU (radio remote unit); a repeater receives a signal, and compares the frequency of the received signal with the frequency of the specific signal, thereby acquiring a frequency error between the two frequencies; and the repeater compensates the frequency error to an emission channel. The invention also discloses a repeater used for performing downlink frequency offset compensation. By using the method and repeater provided by the invention, the downlink frequency offset compensation can be performed on a common signal channel and the channels of other BBU (base band unit) which are not compensated with frequency.

Description

technical field [0001] The invention relates to frequency offset compensation technology in high-speed rail applications, in particular to a downlink frequency offset compensation method and a repeater for downlink frequency offset compensation. Background technique [0002] In high-speed railway applications, when the UE moves at high speed, it will generate a frequency offset relative to the operating frequency. In the existing network processing technology, for the uplink signal, the frequency offset can be corrected through the powerful baseband processing capability of the baseband processing unit (BBU); for the downlink signal, if the BBU does not perform frequency compensation, it cannot be corrected by the UE's own ability The main problem caused by the frequency offset is that the UE cannot camp in the cell, and the block error rate increases, resulting in a decrease in service performance. [0003] In order to solve the above technical problems, the current networ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/03H04B7/15
Inventor 任丽达黄云袁乃华徐绍君肖健佟学俭柳斯白
Owner TD TECH COMM TECH LTD
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