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Method for generating orthogonal spectrum-spreading code in mobile communication system

A mobile communication system and orthogonal spread spectrum technology, applied in wireless communication, transmission system, multi-frequency code system, etc., can solve the problems of small quantity and limited channel capacity, etc.

Inactive Publication Date: 2009-03-04
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, LS codes have good autocorrelation and cross-correlation properties within the IFW, but also have the disadvantage that the number of available codes is small, which limits the improvement of channel capacity

Method used

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  • Method for generating orthogonal spectrum-spreading code in mobile communication system
  • Method for generating orthogonal spectrum-spreading code in mobile communication system
  • Method for generating orthogonal spectrum-spreading code in mobile communication system

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Embodiment Construction

[0026] The orthogonal spreading code generation method of the present invention will be described below with reference to the accompanying drawings.

[0027] Figures 1A to 1F LS codes of lengths 16, 32, 64 and 128 generated according to the code generation method of the present invention are shown. As mentioned above, no general method of generating LS codes is known so far, only the resulting LS codes corresponding to code lengths 16, 32, 64 and 128, respectively.

[0028] In the generated LS code, the numbers on the left indicate the corresponding code number, and the symbols "+" and "-" indicate +1 and -1, respectively. In addition, use "," or a comma to divide the LS code into C and S components, where the left part of the comma represents the C component, and the right part represents the S component. Also, the C component is divided into an upper first C component and a lower second C component. In this case, it can be seen that the first C component and the second C ...

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Abstract

An orthogonal spread code for a mobile communication system is provided which increases an interference free window (IFW) interval as well as the element number of the orthogonal code set. A large synchronization (LS) code is generated by using an initial 2x2 matrix to generate magnified first and second square matrices. A third square matrix is then generated based on the first and second square matrices, and a code sequence is generated from the rows or columns of the third square matrix. In this manner, the inversely proportional relationship between the element number of the orthogonal code set and the IFW interval may be established, and used to avoid channel prediction errors and reduce power imbalance.

Description

technical field [0001] The present invention relates to the orthogonal spread spectrum code of CDMA mobile communication system, more specifically, the present invention relates to the method of generating LS code by extending the original matrix according to specific rules. Background technique [0002] Generally, a Code Division Multiple Access (CDMA) mobile communication system employs a spread spectrum communication method using a spread spectrum code having a transmission bandwidth much wider than that of an information signal to be transmitted. The spread spectrum communication method uses a wide frequency bandwidth so that the original signal can be reproduced after despreading, which increases signal power and keeps noise power low. According to the basic principle of the spread spectrum communication method, when the transmitting part modulates the data multiplied by the spreading code to widen the frequency bandwidth and then transmits the signal, the receiving par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/02H04Q7/20H03M13/27H03M13/23H03M13/29H04B1/00H04B7/005H04B7/06H04B7/216H04B7/26H04B14/04H04J13/12H04L1/00H04L1/06H04L1/08H04L1/18H04L12/56H04L27/26H04L69/40
CPCY02B60/50H04J13/12H04B7/0604H04B7/15507H04B7/15535H04L1/0041H04L1/0045H04L1/0066H04L1/0069H04L1/0071H04L1/06H04L1/08H04L1/1819H04L1/1841H04L1/1845H04L1/1848H04L5/0023H04L5/0042H04L5/0044H04L5/0083H04L27/2602H04W28/14H04W52/143H04W52/225H04W52/24H04W52/241H04W52/242H04W52/245H04W52/46H04L2001/0096H04L47/28H04L47/34H04L27/26035H04J13/18H04L47/10H04W8/04
Inventor 卢东昱
Owner LG ELECTRONICS INC
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