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Apparatus for mapping and spreading data symbols in mobile communication systems

A mobile communication system and data expansion technology, applied in the field of mobile communication systems, can solve problems such as increased complexity of software and hardware

Inactive Publication Date: 2004-10-20
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the calculation processing time and the complexity of software and hardware in the mobile communication system will increase

Method used

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  • Apparatus for mapping and spreading data symbols in mobile communication systems
  • Apparatus for mapping and spreading data symbols in mobile communication systems
  • Apparatus for mapping and spreading data symbols in mobile communication systems

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Embodiment Construction

[0015] Now, when quadrature phase shift keying modulation is performed in the time division duplex mode of mobile communication, by performing data symbol mapping and scrambling processing using binary operations instead of using complex number operations, the mobile system efficiency can be improved in detail. Apparatus and method for mapping and spreading data symbols in a communication system.

[0016] figure 1 is a typical diagram of symbol extension processing for example data, refer to figure 1 , the binary data is mapped into one symbol by 2 bits of the QPSK constellation, and the mapped symbol is processed by spreading.

[0017] The extension processing is roughly divided into two processings. The spectrum spread and channelized data symbols are processed first, and the scrambled channelized data is processed second. Here, data symbols are all QPSK signals and are represented by complex numbers. In addition, the channel code and spreading code consist of complex nu...

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Abstract

The present invention discloses an apparatus for mapping and spreading data symbols in a mobile communication system which can improve efficiency of the system by performing data symbol mapping and spreading processes by using binary operations. The apparatus maps and spreads data symbols by using binary operations when quadrature phase shift keying modulation is performed in a mobile communication time division duplex mode.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a device and method for mapping and extending data symbols in the mobile communication system. Background technique [0002] Usually, when quadrature phase shift keying (QPSK) modulation is used in 3G mobile communication time division duplex (TDD) mode, the binary information of physical channel mapping is mapped into a 2-bit symbol according to the characteristics of QPSK modulation, which is The mapped symbols are channelized and scrambled. Here, extended processing including mapping and scrambling processing is disclosed in US Patent No. 6,293,407. [0003] However, mapping tables and complex multiplication are required to perform symbol mapping, channelization, and scrambling. Therefore, the operation processing time and the complexity of software and hardware in the mobile communication system will increase. [0004] The above references are hereby incorporated by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04J11/00H04J13/20H04L25/03
CPCH04L25/03866H04J13/20H04J13/0044H04B2201/70707H04B1/707
Inventor 张锡一
Owner LG ELECTRONICS INC