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Frequency domain zero correlation block code generation method and device, and multi-carrier-code division multiple access system

A zero-correlation zone and generation method technology, which is applied in the field of communication, can solve the problems of limited number of spreading codes and limited maximum number of users, and achieve the effect of avoiding interference between users

Inactive Publication Date: 2009-05-13
HUAWEI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The constraint that the Q value can only be an integer power of 2 makes the subset smaller, and the number of spreading codes obtained is limited, that is, the maximum number of users that the system can support simultaneously while maintaining no MUI is limited.

Method used

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  • Frequency domain zero correlation block code generation method and device, and multi-carrier-code division multiple access system
  • Frequency domain zero correlation block code generation method and device, and multi-carrier-code division multiple access system
  • Frequency domain zero correlation block code generation method and device, and multi-carrier-code division multiple access system

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Embodiment Construction

[0061] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0062] The embodiment of the present invention provides a multi-carrier-code division multiple access (MC-CDMA) system, using the frequency domain zero-correlation zone (SZCZ) code generation method and functional module or device disclosed in the embodiment of the present invention to generate the SZCZ code, And utilize above-mentioned SZCZ code to carry out data transmission and user identification, thereby make the MC-CDMA system that the embodiment of the present invention provides under the situation of supporting more users, avoid inter-user interference (MUI), and, when active user number changes , no need to re-allocate the code.

[0063] The MC-CDMA system provided by the embodiment of the present invention may include N c carrier (N c is any positive i...

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Abstract

The invention relates to a method for creating frequency domain zero correlation area code and the device and multi-carrier CDMA system. In the embodiment, Kronecker product operation is performed by initiation sequence and Walsh sequence generated according to the system parameter to acquire frequency domain zero correlation area code; the system adopts the frequency domain zero correlation area code for data transmission and user identification, which can effectively avoid interference between users due to selective fading of channel frequency, and support more users compared to system of existing frequency domain zero correlation area code and its selection scheme and support multi-speed service , and does not need code reallocation when active user number changes.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for generating a frequency-domain zero-correlation area code and a multi-carrier-code division multiple access system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in various communication products due to its ability to effectively combat frequency selective fading, high spectrum efficiency, and easy implementation of the system, and has been adopted by various standards. use. Code Division Multiple Access (CDMA) is the mainstream access technology of 2G and 3G systems, which has the advantages of high frequency multiplexing efficiency, and can flexibly use code word allocation to realize multi-user resource allocation. At present, the multi-carrier CDMA (MC-CDMA) technology that combines the advantages of CDMA and OFDM has become a research direction of future communication access technology...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03
Inventor 李静黄爱苹叶甘临吴和兵郑德来
Owner HUAWEI TECH CO LTD
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