Method and device for channel estimation of common-frequency cell

A channel estimation and same-frequency cell technology, applied in multiplex communication, baseband system components, electrical components, etc.

Active Publication Date: 2007-03-14
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no way to perform joint channel estimation to suppress co-channel interference under TD co-frequency networking

Method used

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  • Method and device for channel estimation of common-frequency cell
  • Method and device for channel estimation of common-frequency cell
  • Method and device for channel estimation of common-frequency cell

Examples

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Embodiment Construction

[0098] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0099] Example of Estimating Three Cells

[0100] Referring to FIG. 1, FIG. 1 shows a structural diagram of a channel estimation apparatus 100 for estimating three cells. These include the following components:

[0101] Three 2×128 storage units 110, 118, and 126 are used to store 1×128 complex sequence respectively, that is, the received signal s restored by the three cells 1 , s 2 and s 3 . the s 1 , s 2 and s 3 The initial value is set to all 0.

[0102] The receiving signal Midamble training code (Midamble code) generation device 102 extracts the channel training sequence part of the receiving signal to form 128-chip data.

[0103] For three different cells, each cell has an independent branch for processing, each branch includes the following components and works according to the following process:

[0104] Firs...

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Abstract

This invention discloses one TD-SCDMA same frequency area down part interference offset channel estimation method, which comprises the following steps: for n areas to store memory sequences of s1,s2,s3...son; receiving signal Midamble train codes to form 128-code data; at certain time getting data from signal Midamble train codes for first area remaining part offset; then processing first area signal estimation then for first area to receive signal restore; restoring user terminal from first area to receive signal s1 and brushing s1 memory unit.

Description

technical field [0001] The present invention relates to the channel estimation technique of the same-frequency cell, and more specifically, relates to a channel estimation method and device for partial interference cancellation in the same-frequency cell of TD-SCDMA. Background technique [0002] The TD-SCDMA system can be networked with different frequencies or with the same frequency. The advantage of the same-frequency networking is that all cells may use all possible frequency resources and have the highest spectrum utilization. [0003] In co-frequency networking, multiple access within a cell is implemented through code division multiple access; distinction among cells is implemented through basic Midamble training code (Midamble code) (BMC) and chip-level scrambling code (CSC). The TD-SCDMA system has a total of 128 BMC resources and 128 CSC resources corresponding to one of them. The former is used as a channel training sequence for channel estimation, and the latte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/04H04L25/02
CPCH04B1/7105H04B2201/70701
Inventor 程健罗丽云
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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