A Method for Generating Orthogonal Complementary Sequence Sets Between Groups

A complementary sequence and sequence set technology, applied in orthogonal multiplexing systems, digital transmission systems, error prevention, etc., can solve problems such as limited number of sequences and capacity improvement of code division multiple access communication systems

Inactive Publication Date: 2011-12-21
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

[0012] The purpose of the present invention is to overcome the limitation of the number of sequences in the traditional complementary sequence set, solve the problem of capacity improvement in the CDMA co

Method used

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  • A Method for Generating Orthogonal Complementary Sequence Sets Between Groups
  • A Method for Generating Orthogonal Complementary Sequence Sets Between Groups
  • A Method for Generating Orthogonal Complementary Sequence Sets Between Groups

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example 1

[0045] This embodiment is a two-carrier 8-user code division multiple access system, and the processing gain of the system is required to be equal to 8. According to system requirements, it can be determined that the number of subsequences in the initial complementary sequence set is N=2, the number of sequences is M=2, the length of the subsequences is L=4, and the dimension of the orthogonal matrix is ​​2×2.

[0046] according to image 3 The implementation structure diagram of module 2, first use module 2-2 to select the initial complementary sequence set from the database shown in module 2-1 Then use module 2-3 to select a 2×2 dimensional orthogonal matrix from the database shown in module 2-4 This completes the selection of initial data. Among them, the symbol "+" represents 1, and the symbol "-" represents -1.

[0047] according to Figure 4 In the implementation structure diagram of module 3, first use module 3-1 to sort the initial complementary sequence set S. ...

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Abstract

The invention discloses a method for generating an inter-group orthogonal complementary sequence set. In the method, the conventional complementary sequences are circularly shifted to obtain shift complementary sequences; and the shift complementary sequences are interleaved by using an orthogonal matrix to obtain the inter-group orthogonal complementary sequence set. The obtained complementary sequence set comprises a plurality of complementary sequence groups; the complementary sequences in each group have ideal autocorrelation and mutual correlation performance; and the complementary sequences between different groups are mutually orthogonal. Both the complementary sequence set and each complementary sequence group included in the complementary sequence set reach theoretical limits of sequence design; the problem of capacity constraint of a communication system based on the conventional complementary sequence set can be solved; and the method can be used for non-interference communication of a code division multiple access communication system, main synchronization and auxiliary synchronization of a mobile communication system, channel estimation of an MIMO (Multiple Input Multiple Output) system, construction of mutually orthogonal zero correlation zone sequence set and the like.

Description

technical field [0001] The invention belongs to the technical field of communication system signal design, and in particular relates to a method for generating an intergroup orthogonal complementary sequence set suitable for a multi-carrier code division multiple access communication system. Background technique [0002] Each complementary sequence in the traditional complementary sequence set contains multiple subsequences, and the correlation function of the complementary sequence is equal to the sum of the correlation functions of each subsequence. Due to the ideal periodic and non-periodic correlation performance, the traditional complementary sequence set is used in multiple access communication (Chinese patent CN101965702A), synchronization (Chinese patent CN101155021, CN101523745), channel estimation (Chinese patent CN101626360, CN102007742A) and radar (Chinese patent CN101902432A) ) and many other fields have been widely used. However, the excellent correlation perf...

Claims

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Application Information

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IPC IPC(8): H04J13/18H04J11/00H04L1/00
Inventor 张振宇曾凡鑫宣贵新
Owner CHONGQING UNIV
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