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Method for selecting strength path in multiple cell combined channel estimation

A strong path, local cell technology, applied in the field of channel estimation, can solve the problems of received signal amplitude, phase, frequency distortion, etc.

Inactive Publication Date: 2009-02-04
TD TECH COMM TECH LTD
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Problems solved by technology

Due to the great randomness of the wireless channel, this will cause changes in the CIR and lead to distortion of the amplitude, phase, and frequency of the received signal. Therefore, it is necessary to estimate the CIR of the channel in order to correctly restore the transmission from the received signal Signal

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  • Method for selecting strength path in multiple cell combined channel estimation
  • Method for selecting strength path in multiple cell combined channel estimation
  • Method for selecting strength path in multiple cell combined channel estimation

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Embodiment Construction

[0064] 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.

[0065] The main idea of ​​the present invention is to select a plurality of strong paths from the local cell and neighboring cells according to the CIR estimation obtained by channel estimation of a single cell, and when the total number of selected strong paths exceeds the preset upper limit Q of strong paths, Perform strong path reselection, and reselect Q strong paths from the selected strong paths.

[0066] The specific implementation of the method for selecting strong diameters of the present invention will be described below through a specific example.

[0067] It is assumed that the CIR estimates of the own cell and each neighboring cell used in the method of the present invention have been obtained according to related methods in the prior art. ...

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Abstract

The invention discloses a method selecting strong path, which selects a plurality of strong paths from the subdistrict according to channel impulse response (CIR) guess value of the subdistrict and a pre-set sets first threshold firstly; then the method selects a plurality of strong paths from adjacent subdistricts according to CIR guess value of each adjacent subdistrict and a pre-set sets second threshold; at last, when the total number of the selected plurality of strong paths is larger than upper limit Q of the number of the pre-set strong paths, Q strong paths are selected from the selected plurality of strong paths. When the invention is applied, selected path can be in line with the needs of multi-subdistrict joint channel guess value to the strong path, complexity of the multi-subdistrict joint channel guess value can be controlled in a certain range, and strong path selection with high accuracy is realized.

Description

technical field [0001] The invention relates to channel estimation technology, in particular to a method for selecting strong paths in multi-cell joint channel estimation. Background technique [0002] The transmitted signal is transmitted in the wireless channel and will be affected by the wireless channel. Therefore, the receiving end needs to restore the transmitted signal from the received signal according to the degree of influence of the wireless channel on the transmitted signal. The degree of influence of the wireless channel on the transmitted signal is expressed as a channel impulse response (CIR, channel impulse response) of the wireless channel. Due to the great randomness of the wireless channel, this will cause changes in the CIR and lead to distortion of the amplitude, phase, and frequency of the received signal. Therefore, it is necessary to estimate the CIR of the channel in order to correctly restore the transmission from the received signal Signal. The p...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04L25/02
Inventor 徐绍君薛强佟学俭
Owner TD TECH COMM TECH LTD
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