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Multicarrier system with 3780-point IDFT/DFT processor and method therefor

A processor, multi-carrier receiving technology, applied in multi-carrier systems, modulated carrier systems, multi-frequency code systems, etc., can solve problems such as low efficiency

Inactive Publication Date: 2007-02-07
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

It further requires the receiving end to design a new DFT module relative to the PN sequence, or insert 0 padding in the 3780-point DFT to perform DFT on the PN sequence, thus resulting in inefficiency

Method used

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  • Multicarrier system with 3780-point IDFT/DFT processor and method therefor
  • Multicarrier system with 3780-point IDFT/DFT processor and method therefor
  • Multicarrier system with 3780-point IDFT/DFT processor and method therefor

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Embodiment Construction

[0036] Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

[0037] Figure 3A is a schematic block diagram showing a TDS-OFDM transmission system with an improved 3780-point IDFT processor according to the present invention.

[0038] The TDS-OFDM transmission system includes an FEC (Forward Error Correction) unit 100 and an OFDM modulator 200 . The OFDM modulator 200 includes a mapping unit 210 , a 3780-point IDFT unit 400 , a guard interval insertion unit 240 , a synchronization information insertion unit 250 , a shaping filter unit 260 and an RF unit 270 .

[0039] The FEC unit 100 performs encoding for the receiving end to detect and correct errors. The mapping unit 210 maps FEC-encoded data into I / Q constellations.

[0040] The 3780-point IDFT unit 400 allocates a frequency-domain OFDM signal including 3780 parallel data to 3780 subcarriers for modulation, thereby outputting a time-domain OFDM sign...

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Abstract

An OFDM(Orthogonal Frequency Division Multiplexing) system having a 3780-point IDFT(Inverse Discrete Fourier Transform) / DFT(Discrete Fourier Transform) processor and a structure of the 3780-point IDFT / DFT processor are provided to improve the structure of the 3780-point IDFT / DFT processor to be used efficiently in a transmitter and in a receiver. CONSTITUTION: A FEC(Forward Error Correction) part(120) codes an OFDM signal in a frequency domain to sense an error in a receiver side and to correct the error. A mapping part(210) maps the coded OFDM signal in the frequency domain by a mapping method. A 3870-point IDFT processor modulates the OFDM signal in the frequency domain into an OFDM signal in a time domain using a DFT module. And a guard interval insertion part(240) inserts a guard interval to the OFDM signal in the time domain. The 3870-point IDFT processor is constituted with one assembly among an assembly of a 252-point DFT module and a 15-point DFT module, an assembly of a 315-point DFT module and a 12-point DFT module and an assembly of a 420-point DFT module and a 9-point DFT module.

Description

[0001] This application is a divisional application of an invention patent application with an application date of March 17, 2003, an application number of 03107204.6, and an invention title of "multi-carrier system with 3780-point IDFT / DFT processor and its method". technical field [0002] The present invention relates to a kind of multi-carrier digital broadcasting system and method thereof, more specifically, relate to a kind of multi-carrier sending and receiving system with IDFT / DFT (inverse discrete Fourier transform / discrete Fourier transform) processor of 3780 points, a A multi-carrier transmission and reception method for an IDFT / DFT processor having 3780 points and a structure of a 3780-point IDFT / DFT processor. Background technique [0003] OFDM (Orthogonal Frequency Division Multiplexing) is one of the multi-carrier modulation methods, which has good performance under multipath and mobile receiving conditions. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/32H04L27/26H03M13/00H04L29/00H04J11/00
CPCH04L1/0042H04L27/2636H04L27/2605
Inventor 郭征元
Owner SAMSUNG ELECTRONICS CO LTD
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