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Communicating method and apparatus of multi-rate multi-carrier CDMA system

A communication method and multi-rate technology, applied in the field of spread spectrum communication, can solve the problems of overall equipment cost increase and ineffective popularization and application, and achieve the effect of simple circuit

Inactive Publication Date: 2009-11-04
ACCTON TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, if all available spreading code tables are directly stored on the user end, such as storing an entire code tree, it will increase the cost of the overall equipment and cannot be effectively popularized and used in the market

Method used

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  • Communicating method and apparatus of multi-rate multi-carrier CDMA system
  • Communicating method and apparatus of multi-rate multi-carrier CDMA system
  • Communicating method and apparatus of multi-rate multi-carrier CDMA system

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Embodiment Construction

[0031] preferred embodiment

[0032] The features of the present invention will be described below by taking a multi-rate multi-carrier CDMA communication system as an example.

[0033] figure 1 It shows that one base station 100 serves multiple UEs 102 in one area. In mobile communication applications, the UE 102 sometimes moves in different areas, so the same base station 100 may not always be connected to the same UE 102 . In addition, these user terminals 102 use the spread spectrum technology, and each user terminal uses a different spread spectrum code to overlap and use the same multiple carriers.

[0034] For example, if the bit to be transmitted to the A client terminal 102 is a (value +1 or -1), the spreading code used by the A client terminal 102 for spreading the first carrier is (+1, -1); The bit to be transmitted to be transmitted to the B user terminal 102 is b (value +1 or -1), and the spreading code used by the B user terminal 102 at the first carrier frequ...

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Abstract

In codes multiple address and speed rate communication system, the base bench sends the index marks to several user terminals. The index marks length is relative to the permitted transmission speed and together with index marks to form one code tree, wherein mother nodes and children node block each other with nodes crossed in the same step. The user terminal generates index mark matrix according to index marks and then finds the marked matrix by use of the matrix in all user terminals and to generate frequency expansion relative to different wave.

Description

【Technical field】 [0001] The present invention relates to a spread spectrum communication method, and in particular to a spread spectrum communication method for generating spread spectrum codes. 【Background technique】 [0002] The rapid development of mobile phone applications and markets around the world has promoted the rapid development of wireless communication technology. The success of the widely used second generation (2G) mobile communication system not only affects the life of modern people, but also accelerates the development of the third generation mobile communication system (3G). Among the thriving third-generation wireless communications, the more important ones include CDMA2000 based on Code Division Multiple Access (CDMA) technology, and Wideband-CDMA (W-CDMA) compatible with the current 2.5-generation GSM network. ) and China's proposed TD-SCDMA technology. [0003] However, people are not satisfied with the so-called 3G technology. With the increasing d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/02
Inventor 杨谷章
Owner ACCTON TECHNOLOGY CORPORATION