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Activation code channel detection method and device

A technology for activating code channel and detection method, applied in the field of code channel detection, activation code channel detection method and device, can solve the problem of low accuracy rate of activation code channel detection, achieve high accuracy rate activation code channel detection, and improve the accuracy rate Effect

Inactive Publication Date: 2012-10-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing code channel detection technology only judges whether the code channel is activated by comparing the accumulated value with the noise threshold. This simple noise threshold judgment makes it possible to activate the code channel when the noise estimation is inaccurate or the interfering user signal is weak. The detection accuracy is low

Method used

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  • Activation code channel detection method and device
  • Activation code channel detection method and device
  • Activation code channel detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a schematic flowchart of an active code channel detection method according to an embodiment of the present invention. Such as figure 1 As shown, the activation code channel detection method includes:

[0025] 101. Perform descrambling and despreading on the received signal according to the node corresponding to the current spreading factor in the spreading code tree, and obtain symbol energy corresponding to each node after descrambling and despreading;

[0026] 102. Obtain a first decision parameter and a second decision parameter respectively according to the symbol energy of two adjacent nodes belonging to the same parent node and the pre-acquired noise threshold, where the first decision parameter is the noise The comparison result of comparing the threshold with the symbol energy of the two adjacent nodes, and the second decision parameter is the comparison result of comparing the symbol energy of the two adjacent nodes;

[0027] 103. Detect the m...

Embodiment 2

[0036] On the basis of Embodiment 1, an extended description is given on performing active code channel detection according to the first decision parameter, the second decision parameter, and the modulation mode detection result.

[0037] Specifically, according to the first decision parameter, the second decision parameter, and the modulation mode detection result, performing active code channel detection specifically includes:

[0038] According to the first decision parameter, the second decision parameter, and the modulation mode detection result, detect whether the code channel corresponding to the two adjacent nodes is an active code channel, and determine whether the two adjacent nodes belong to Whether the parent node exists;

[0039] If the parent node to which the two adjacent nodes belong exists, then update the spreading factor corresponding to the parent node to the current spreading factor, and return to execute according to the spreading factor corresponding to ...

Embodiment 3

[0063] image 3 It is a schematic structural diagram of an active code channel detection device according to an embodiment of the present invention. Such as image 3 As shown, the activated code channel detection device includes:

[0064] The first processing module 31 is configured to descramble and despread the received signal according to the node corresponding to the current spreading factor in the spreading code tree, and obtain symbol energy corresponding to each node after descrambling and despreading;

[0065]The second processing module 32 is configured to acquire a first decision parameter and a second decision parameter respectively according to the symbol energy of two adjacent nodes belonging to the same parent node and the pre-acquired noise threshold, wherein the first decision The parameter is a comparison result of comparing the noise threshold with the symbol energies of the two adjacent nodes, and the second decision parameter is a comparison result of com...

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Abstract

The invention provides an activation code channel detection method and an activation code channel detection device. The method comprises the following steps of: descrambling and de-spreading receiving signals according to nodes in a spread spectrum code tree corresponding to a current spread spectrum factor to obtain descrambled and de-spread sign energies corresponding to each of the nodes; respectively obtaining a first judging parameter and a second judging parameter according to the sign energies of two adjacent nodes belonging to a same parent node and a pre-obtained noise threshold, wherein the first judging parameter is a comparison result obtained by respectively comparing the noise threshold with the sign energies of the two adjacent nodes, and the second judging parameter is a comparison result obtained by comparing the sign energies of the two adjacent nodes; detecting the modulation mode of the corresponding code channel of the two adjacent nodes to obtain a modulation mode detection result; and executing activation code channel detection according to the first judging parameter, the second judging parameter and the modulation mode detection result.

Description

technical field [0001] The invention relates to code channel detection technology, in particular to an activated code channel detection method and device, and belongs to the technical field of communication. Background technique [0002] In the downlink of the CDMA system, the UE usually only knows some information of the user, so the interference suppression algorithm is used for other users. Since CDMA is an interference-limited system, in order to improve the system capacity, an advanced interference user suppression algorithm is developed. This requires more information about interfering users, such as the number of code channels occupied by each user. By detecting the number of activated code channels, it can be judged whether there is a new user joining, which can be used for user capture, soft handover process, multi-user detection, etc. [0003] The existing code channel detection technology usually despreads the received signal for all the spreading codes in the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7097
CPCH04B1/707H04J13/0044H04J13/0048H04J13/0051
Inventor 郭晶
Owner HUAWEI TECH CO LTD