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Signal transmitting and receiving apparatus

A technology of signal sending device and signal receiving device, which is applied in the direction of digital transmission system, baseband system, electrical components, etc.

Inactive Publication Date: 2012-11-28
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, by using a cyclic prefix, the sampling clock signal error caused by the sampling period difference between the transmitting device and the receiving device may not be offset by the frequency offset of the accumulated subcarrier obtained by estimating the cyclic prefix

Method used

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  • Signal transmitting and receiving apparatus
  • Signal transmitting and receiving apparatus
  • Signal transmitting and receiving apparatus

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Embodiment Construction

[0043] In the following detailed description, certain exemplary embodiments of the present invention have been shown and described, by way of illustration only. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and specification are to be regarded as illustrative in nature and not restrictive. Like reference numbers designate like elements throughout the description.

[0044] Throughout this specification and the claims that follow, unless expressly stated to the contrary, the word "comprise" and variations thereof will be understood to mean the inclusion of stated elements but not the exclusion of any other elements.

[0045] In addition, the wording "module" shall be understood to mean a unit for processing predetermined functions or operations, which may be realized by hardware, software, or a combination thereof.

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Abstract

The present invention relates to signal transmitting / receiving apparatuses. The signal transmitting apparatus includes an inverse discrete Fourier transform module, a cyclic prefix adding module, a preamble adding module, and a digital-analog converting module. The inverse discrete Fourier transform module receives modulated data, performs inverse discrete Fourier transform, and generates a firstsymbol. The cyclic prefix adding module adds a predetermined cyclic prefix to the first symbol, and generates a second symbol. The preamble adding module adds a predetermined preamble to the second symbol, and generates a third symbol. The digital-analog converting module converts the third symbol including the cyclic prefix and the preamble into an analog symbol.

Description

[0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2005-0120144 filed on December 08, 2005 at the Korean Intellectual Property Office and Korean Patent Application No. 10-2006- filed on July 11, 2006 at the Korean Intellectual Property Office Priority and benefit of No. 0064678, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a signal transmitting / receiving device. In particular, the present invention relates to a signal transmission / reception apparatus for minimizing a sampling clock error caused by a slight cycle difference in an Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0004] Under the wireless channel environment, the subcarrier power changes, and the subcarrier phase is distorted. A system for performing Orthogonal Frequency Division Multiplexing (OFDM) to compensate for the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L25/0224H04L27/2607H04L27/2628H04L27/265H04L27/2675H04L27/2695H04L27/2665H04L27/2613
Inventor 田仙心朴亨濬朴玉
Owner ELECTRONICS & TELECOMM RES INST
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