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Method and apparatus for time sequence control in channel estimation

A channel estimation and timing control technology, applied to the shaping network, electrical components, transmission system, etc. in the transmitter/receiver.

Inactive Publication Date: 2013-03-20
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in current patents (such as U.S. Patent No. 7,058,399 and U.S. Patent Early Publication No. 2007 / 0009065), there are only instructions on how to place the window of the Multi-Path Searcher (Multi-Path Searcher, MPS) in the CDMA system, but there is no Did not discuss how to place CE Window properly

Method used

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  • Method and apparatus for time sequence control in channel estimation
  • Method and apparatus for time sequence control in channel estimation
  • Method and apparatus for time sequence control in channel estimation

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Embodiment Construction

[0070] In order to place the channel estimation window in a proper position to obtain good channel estimation results, the present invention proposes a timing control method in channel estimation and a timing control device in channel estimation. In order to facilitate the description of the embodiments of the present invention, the CDMA system is used as an example below, but those skilled in the art should be able to deduce that the present invention can also be applied to other spread spectrum systems, or any communication system that uses channel estimation , to adjust the position of the channel estimation window.

[0071] image 3 A system block diagram of the receiving end of the embodiment of the present invention is shown. Please refer to image 3 , the receiving end 300 includes a channel estimation unit 310 , an equalizer 330 , a despreading unit 350 , a decision unit 370 and a timing control device 380 . The receiver 300 receives a received signal r(t) from the ...

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Abstract

The invention relates to a time sequence control method and a device thereof used for channel estimation. Channel estimation windows are orderly moved by the method. After one of the channel estimation windows is moved, a metering value is calculated out according to a time-delay path and the channel frequency power of the channel estimation window, and the metering values of the other channel estimation windows are orderly calculated out. Then the maximum metering value is found out in the metering values, and the time sequence of the channel estimation is adjusted according to the position of the channel estimation window with the maximum metering value.

Description

technical field [0001] The present invention relates to a timing control method, and in particular to a timing control method in channel estimation. Background technique [0002] In the wireless communication environment, due to the Doppler effect caused by the movement of the receiving end or the transmitting end, or the multipath phenomenon caused by the diffraction and refraction of electromagnetic waves by obstacles between the receiving end and the transmitting end, the receiving end The signal received by the terminal is subject to a lot of interference. Taking the current Code Division Multiple Access (CDMA) system as an example, since the CDMA system uses multiple spreading codes to transmit signals of multiple users at the same time, and utilizes each spreading code The orthogonality between frequency codes prevents signals from users from interfering with each other. However, when the transmitted signal suffers from multipath interference in the transmission chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L25/02H04B1/7113
Inventor 陈柏颖彭仁威郭维礼
Owner MEDIATEK INC