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Method and apparatus of generating signals for initial ranging in ofdma system

一种正交频分多址、初始测距的技术，应用在多频码系统、导频信号分配、传输系统等方向，能够解决复杂性增加等问题

Inactive Publication Date: 2013-01-02
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the problem with the conventional method is that the more the number of symbols increases, the more the complexity increases

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  • Method and apparatus of generating signals for initial ranging in ofdma system
  • Method and apparatus of generating signals for initial ranging in ofdma system
  • Method and apparatus of generating signals for initial ranging in ofdma system

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Embodiment Construction

[0027] Advantages, features, and aspects of the present invention will become apparent from the following description of embodiments set forth hereinafter with reference to the accompanying drawings. Therefore, those skilled in the art to which the present invention pertains can easily implement the technical idea and scope of the present invention. Also, if it is considered that the detailed description of the related art may obscure the gist of the present invention, the detailed description will not be provided here. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] image 3 is a block diagram illustrating an apparatus for generating an initial ranging signal according to an embodiment of the present invention. Such as image 3 As shown, the initial ranging signal generating device 300 includes: a symbol data generator 302 , a cyclic prefix inserter 304 and a radio frequency (RF) ...

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Abstract

Provided is a method and apparatus of generating signals for initial ranging in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The method, includes: generating a plurality of ranging symbols by cyclic-shifting sample data of a ranging symbol in one OFDMA symbol period as much as a value obtained by multiplying a cyclic prefix size by a symbol index; generating a ranging signal by copying a rear part corresponding to the cyclic prefix size in the sample data with respect to each of the ranging symbols and inserting the copied rear part in front of the sample data as a cyclic prefix.

Description

technical field [0001] The present invention relates to a method and apparatus for generating a signal for initial ranging in an Orthogonal Frequency Division Multiple Access (OFDMA) system; A method and device for generating a signal for initial ranging in the above process. [0002] This work was supported by the IT R&D program of MIC / IITA [2005-S-002-03, "Development of cognitive radio technology for efficient spectrum utilization"]. Background technique [0003] In an Orthogonal Frequency Division Multiple Access (OFDMA) system, a signal transmitted from a terminal should arrive at a base station at a reference timing. The base station estimates timing offsets of signals transmitted from terminals, and controls transmission timings of terminals located in different places based on the estimation results, thereby synchronizing timings of reception signals of the terminals. Therefore, the terminal needs an initial ranging procedure for controlling transmission timing bef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2656H04L27/2613H04L5/0048H04L27/2601H04L27/2602H04L27/2628H04L27/20
Inventor 严重善黄貹铉金昌周宋明善
Owner ELECTRONICS & TELECOMM RES INST