WCDMA code channel detection method

Abstract

The invention relates to a WCDMA code channel detection method. The method comprises the steps of receiving a base station signal; dispreading the base station signal according to each spreading code in a spreading code tress to obtain a symbol set S1; performing energy normalization of the symbol set S1, and selecting a symbol of which the normalized energy is more than the preset threshold to form a new symbol set S2; performing energy normalization for the symbol set S2 to obtain a symbol set S3, wherein the symbols in S3 are used as the final energy normalized symbols; calculating the MER value of the symbols in the symbol set S3 under the corresponding dispreading of the spreading code by the possible modulation mode; if the MER is more than the preset threshold, initially determining that the spreading code is an activating code channel; otherwise, determining the spreading code to be an non-activated code channel; determining the activated code channel. With the adoption of the method, the code channel detection accuracy can be improved, the network coding and decoding opportunities can be increased, and the throughput of the network can be improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a WCDMA code channel detection method. Background technique [0002] In the industrialization process of WCDMA and other communication standards, the corresponding test instruments play a vital role in the development, construction and maintenance of network equipment. As an important component in the mobile communication network, the base station has a huge number, is widely distributed, and has widely varying application conditions, so its performance will greatly affect the quality of the network. Therefore, how to improve base station performance and ensure network quality is one of the key issues faced by major wireless communication equipment manufacturers, and it is also the first consideration for operators when selecting base station models. Therefore, whether it is an equipment manufacturer or an operator, the test of the base station is essential. [0003] In o...

AI Technical Summary

Problems solved by technology

This judgment method mainly has three defects: 1. When the signal to interference ratio is low, the power of some active code channels is smaller than the noise power of some inactive code channels, and it is easy to cause False and Missing Alarms

2. Due to the construction characteristics of the spreading code tree, when a child node of a parent node is activated, the detection power of the code channel of the parent node will be similar to or even greater than the code channel power of the child node, resulting in misjudgment of the activated code channel. When a parent node is activated, the code channel of the parent node's child nodes will share the code channel power of the parent node, which may easily cause misjudgment of the activated code channel. For some special channels, because the signal is not random enough, its energy is also It will spread to some sub-code channels with direct relationship in a concentrated manner, causing misjudgment

3. Some special channels do not send signals continuously, and their power is so low that they cannot be detected

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