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Method for solving multidress interference in TD-SCDMA system

A TD-SCDMA, another group of technologies, applied in the field of solving multiple access interference, can solve the problems of multiple access interference, insufficient code resources, insufficient additional code resources, etc.

Inactive Publication Date: 2005-11-09
上海贝豪通讯电子有限公司
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Problems solved by technology

[0017] The purpose of the present invention is to provide a method for solving multiple access interference in a TD-SCDMA system. For the phenomenon of insufficient code resources, the premise of retaining the Orthogonal Variable Spreading Factor (OVSF) code generated by the original generation method is proposed Next, add another group of codewords obtained by new changes, and compare and group them to realize the situation of insufficient code resources, so as to avoid the problem of multiple access interference caused by the incomplete orthogonality of the secondary scrambling codes used.

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Embodiment Construction

[0031] The invention provides a method for solving multiple access interference in a TD-SCDMA system, the basic idea of ​​the method is as follows:

[0032] First, the generation method of the Orthogonal Variable Spreading Factor (OVSF) code is changed as follows:

[0033] C ch , 2,0 C ch , 2,1 = C ch , 1,0 C ch , 1,0 ...

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Abstract

This invention relates to a method for solving multi-address interference in TD-SCDMA system including original generated orthogonal variable spread spectrum factor codes. Another ground of orthogonal variable spread spectrum factor codes are generated (N- OVSF) on the basis of original codes. When the code resource is not enough and no other codes can be distributed, the newly generated N-OVSF codes are taken as the spread spectrum codes of new users to release the insufficient code resource.

Description

【Technical field】 [0001] The invention relates to a signal interference processing method in the technical field of mobile communication, in particular to a method for solving multiple access interference in a TD-SCDMA system. 【Background technique】 [0002] TD-SCDMA is one of the mainstreams of terrestrial wireless technologies stipulated by 3G. However, since the 3G system adopts CDMA technology, that is, different spreading code words are used to distinguish users, which requires that the spreading codes of each user have strong autocorrelation and weak cross-correlation. In fact, the mutual interference between users cannot be completely eliminated, so the CDMA system is an interference-limited system, and the main interference of the system is co-channel interference, one of which is due to the time-varying and multipath effects of the wireless communication channel in the CDMA system. Interference within the cell is formed, including inter-symbol interference (ISI) be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7107H04J13/20
Inventor 夏芸
Owner 上海贝豪通讯电子有限公司
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