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Intergroup orthogonal complementary code production method and application system

A generation method and complementary code technology, which are applied to the complementary code generation method and the field of multi-carrier DS-CDMA cellular mobile communication systems, can solve problems such as complex multi-user detection, and achieve MAI elimination, simple implementation, and high networking spectral efficiency. Effect

Inactive Publication Date: 2006-02-22
ZHEJIANG UNIV
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Problems solved by technology

However, the traditional MCDS-CDMA system needs to strike a balance between the number of users it can accommodate and the degree of diversity it can provide. The time-frequency two-domain spread spectrum proposed in the paper can make the number of users accommodated by the system not affected by the diversity degree. But requires complex multi-user detection (MUD)

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  • Intergroup orthogonal complementary code production method and application system
  • Intergroup orthogonal complementary code production method and application system
  • Intergroup orthogonal complementary code production method and application system

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Embodiment Construction

[0029] The following describes in detail the generation method of the positive interactive complement (M, K, G) set between groups in combination with the embodiments. The parameter M represents the number of code groups, K represents the number of codes contained in each group, and G represents the sum of the lengths of each subcode of an inter-group positive interactive complement code, that is, the processing gain.

[0030] The first step is to select an initial orthogonal complementary code set, in which there are M complementary codes C 1 , C 2 …C M , each complementary code C j Contains M subcodes C j1 , C j2 …C jM , the length of each subcode is N=G / (M×K), and the mth subcode C jm = ( C jm 1 C jm 2 · · · C jm ...

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Abstract

The invention discloses a generating method of inter-orthogonal mutual-complemeting code and a multi-carrier DS-CDMA cellular mobile communication system which utilizes said method to spread the spectrum. The inter-orthogonal mutual-complementing code attained by original orthogonal mutual-complementing code and orthogonal matrix operation has ideal features of self-correlation and cross-correlation while the self-correlation function of each code and the cross-correlation function between any two codes of group both have the zero correlation window and the cross-correlation function is complete complementary. The invention reaches the application of inter-orthogonal mutual-complementing code in the multi-carrier DS-CDMA cellular mobile communication system, which can realize the non-multiple access disturbing and non-adjacent residential disturbing.

Description

technical field [0001] The present invention relates to a method for generating complementary codes and a multi-carrier DS-CDMA cellular mobile communication system, in particular, to a method for generating inter-group positive interaction complement codes, and a multi-carrier DS using inter-group positive interaction complement code spread spectrum -CDMA cellular mobile communication system. Background technique [0002] Due to the limited spectrum resources and the increasing demand for multimedia services, it is increasingly urgent to improve the spectrum efficiency of future wireless communication systems. Compared with traditional multiple access technologies, such as FDMA and TDMA, CDMA has the characteristics of large capacity and soft capacity, and is adopted by 2G and 3G mobile communication systems. [0003] Due to the multipath delay and Doppler frequency shift characteristics of the wireless channel, the performance of the CDMA system is mainly affected by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/02H04L27/26H04J13/12
Inventor 黄爱苹李静
Owner ZHEJIANG UNIV
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