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Super-complementary-code generating method, system and communication system using the super-complementary-code

A generation method and complementary code technology, applied in multiplexing communication, code division multiplexing systems, electrical components, etc., can solve the problems of data asynchrony, reduction in the number of codes, large guard interval, etc., and improve the capacity , the effect of reducing the number of codes

Inactive Publication Date: 2005-06-08
ZHEJIANG UNIV +1
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Problems solved by technology

Third, due to the asynchronous data transmitted from each mobile terminal to the base station in the uplink in the same cell, part of the aperiodic cross-correlation function between the user identification codes, rather than the periodic correlation function, determines the uplink wireless transmission performance; unfortunately, the former is usually more difficult to control than the latter, and also leads to more severe multiple access interference problems than in the downlink
Both of the above two patents generate codes with a zero correlation window, and the multiple access interference and multipath interference outside the zero correlation window cannot be eliminated
The length of its zero-correlation window is limited, because a larger zero-correlation window means a larger guard interval (system overhead), and reduces the number of generated codes (the number of users that can be supported)

Method used

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  • Super-complementary-code generating method, system and communication system using the super-complementary-code

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Embodiment Construction

[0040] The present invention will be described in detail below according to the accompanying drawings.

[0041] see figure 1 , which shows the overall architecture diagram of the system 10 for generating super complementary codes of the present invention. The system 10 for generating super complementary codes includes: an orthogonal matrix group 11 , a sequence generator 12 , a complete complementary code generator 13 , a super complementary code generator 14 and a length extension device 15 .

[0042] The orthogonal matrix group 11 has a first orthogonal matrix 111 , a second orthogonal matrix 112 and a third orthogonal matrix 113 . The dimensions of the first orthogonal matrix 111 , the second orthogonal matrix 112 and the third orthogonal matrix 113 are N×N, and the absolute value of each element is 1, and N is a positive integer.

[0043] First let A be the first orthogonal matrix 111, and A i is the ith row vector of A (i=1, 2, ..., N), represented by the following for...

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Abstract

This invention discloses a super complementary code producing method, the system and the communication system using the super complementary code. At first produce N complete complementary codes, and every complementary code has N basic codes, and every basic code has N to the power 2 elements, interacting compute the basic codes to get several complementary codes, every super complementary code has several sub-code, and every sub-code has at least one element. The system producing super complementary is mainly composed of orthogonal matrix assembly, the sequence producer, the complete complementary code producer and the super complementary producer. The super complementary code produced by this invention has the characteristics of 'non-connection interference' and 'non-multi-way interference'. In addition, because the length of the sub-code of the super complementary code can be lowered to 1, so it can lower the ratio of the gain value and the number of users to 1 at least, and the super complementary code of this invention can increase the number of supporting communication users.

Description

technical field [0001] The present invention relates to a method and system for generating complementary codes, and a code division multiple access communication system, in particular, to a method and system for generating super complementary codes, and a code division multiple access communication system using super complementary codes. Background technique [0002] While the third-generation wireless communication system is about to enter global deployment, the implementation architecture of the fourth-generation system has become one of the most common research topics in the communication field. However, the performance of the air-interface technology currently used in the third generation system should be further improved to meet the needs of the fourth generation system. In a mobile communication system, 'uplink' refers to the transmission from the mobile terminal to the base station, and 'downlink' refers to the transmission from the base station to the mobile phone. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/04
Inventor 陈晓华黄爱苹
Owner ZHEJIANG UNIV
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