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Dual carrier modulator, OFDM transmitter therewith, and a method thereof

A dual-carrier modulation and transmitter technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve problems such as signal loss

Inactive Publication Date: 2006-08-23
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, signal loss can result when an I / Q mismatch occurs due to noise inserted into one of channel I and channel Q

Method used

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  • Dual carrier modulator, OFDM transmitter therewith, and a method thereof
  • Dual carrier modulator, OFDM transmitter therewith, and a method thereof
  • Dual carrier modulator, OFDM transmitter therewith, and a method thereof

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Embodiment Construction

[0022] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0023] In the following description, the same reference numerals are used for the same components even in different drawings. Matters such as detailed structures and components defined in the description are only for aiding in a comprehensive understanding of the present invention. Therefore, it is apparent that the present invention can be carried out without those defined matters. Also, well-known functions and constructions will not be described in detail since they would obscure the invention in unnecessary detail.

[0024] FIG. 2 is a block diagram showing the structure of a dual carrier modulator according to an exemplary embodiment of the present invention. Referring to FIG. 2 , the dual carrier modulator includes an input part 110 , a memory part 120 , a detection part 130 , and an operation part 140 .

[0025] The input secti...

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Abstract

A dual carrier modulator that modulates an orthogonal frequency division multiplexing (OFDM) carrier, includes an input part receiving a predetermined number of coded bits; a memory part storing the coded bits received through the input part; a detection part detecting four bits among the coded bits in a predetermined order; and an operation part generating a modulated symbol comprising a real part and an imaginary part, using the four detected bits and a predetermined unitary matrix. Here, one of the detected four bits is included in a real part of a first modulated symbol and in an imaginary part of a second modulated symbol. Accordingly, loss of signals caused by mismatching between an In-phase channel and a Quadrature channel can be prevented.

Description

technical field [0001] The device and method according to the present invention relate to a dual-carrier modulator for modulating an Orthogonal Frequency Division Multiplexing (OFDM) carrier, an OFDM transmitter using the dual-carrier modulator, and a method thereof, and more particularly, to a method for generating A dual-carrier modulator of a modulated symbol, an OFDM transmitter using the same, and a method thereof, wherein coded bits are arranged in real and imaginary parts of said modulated symbol. Background technique [0002] Ultra-wideband (UWB) wireless technology enables high-speed data transmission using a frequency band of hundreds of megahertz. OFDM is one of technologies using such UWB communication. By using hundreds or thousands of subcarriers of different frequencies, OFDM can compress a larger amount of information per symbol period than digital data transmission systems, and can transmit the compressed information. Therefore, OFD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L1/06H04L27/2628H04L27/2636H04L27/26
Inventor 金海式李廷相
Owner SAMSUNG ELECTRONICS CO LTD
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