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公开(公告)号：KR1020110138146A
公开(公告)日：2011-12-26
申请号：KR1020110035727
申请日：2011-04-18
Applicant: 한국전자통신연구원 , 전남대학교산학협력단
CPC classification number: H04B7/0443 , H04B7/0682 , H04L27/0008 , H04L27/367 , H04W52/262 , H04B7/0434 , H04B7/0456 , H04B7/0617 , H04B7/0857 , H04L1/0054
Abstract: PURPOSE: A broadcasting data transmission system is provided to improve data transmission performance in a fading channel by decoding a data stream. CONSTITUTION: A broadcasting data transmission apparatus controls the transmission power of a data stream according to a modulation method about each transmission antenna(310). The broadcasting data transmission apparatus previously codes the data stream controlled by the transmission power using a pre-coding matrix according to the modulation method(320). The broadcasting data transmission apparatus transmits the coded data stream to a reception unit using the transmission antenna(330).
Abstract translation: 目的：提供广播数据传输系统，通过解码数据流来改善衰落信道中的数据传输性能。 构成：广播数据发送装置根据关于每个发送天线（310）的调制方法来控制数据流的发送功率。 广播数据发送装置根据调制方式（320），使用预编码矩阵预先编码由发送功率控制的数据流。 广播数据发送装置使用发送天线（330）将编码数据流发送到接收单元。
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公开(公告)号：KR101094441B1
公开(公告)日：2011-12-20
申请号：KR1020070116459
申请日：2007-11-15
Applicant: 한국전자통신연구원
IPC: H04N21/236
CPC classification number: H04N21/64315 , H04N19/39 , H04N21/234327 , H04N21/236
Abstract: 방송 신호 전송 방법에서, 전송 프레임은 기존의 지상파 DMB 신호의 구조와 동일한 구조를 가지며, 기본 계층 서비스 스트림을 포함하는 전송 프레임은 기본 계층으로 변조되고, 강화 계층 서비스 스트림을 포함하는 전송 프레임은 강화 계층으로 변조된다. 이때, 강화 계층 서비스 스트림은 강화 계층 서비스를 제공하기 위하여 기본 계층 서비스 스트림에 포함되지 않은 부가적인 데이터로 구성된다.
이와 같이 하면, 기존의 지상파 DMB와 호환가능하면서도, 고전송 효율을 요구하는 고품질의 서비스를 제공할 수 있다. 이때, 고전송 효율은 기존의 지상파 DMB보다 높은 데이터 전송률을 의미한다.
지상파 DMB, 방송, 계층적 변조 방식, 고품질 서비스, 비디오 서비스-
公开(公告)号：KR101023257B1
公开(公告)日：2011-03-21
申请号：KR1020080130652
申请日：2008-12-19
Applicant: 한국전자통신연구원
Abstract: 본 발명은 계층 변조가 적용된 지상파 DMB 시스템에서의 하이브리드 변조 방법 및 장치에 관한 것이다.
이를 위하여, 본 발명은 LP 신호에서 MSB 비트 및 LSB 비트에 설정된 진폭 변조 값 및 위상 변화 값에 따라, HP 신호의 진폭 및 HP 신호의 위상을 변조시킨 뒤, 진폭 변조된 신호와 위상 변조된 신호를 결합하여 송출하는 변조 방법을 제공한다. 또한, 본 발명은 LP 신호에서 MSB 비트 및 LSB 비트의 설정 값을 확인하는 수단; HP 신호의 진폭을 변조시키는 수단; HP 신호의 위상을 변조시키는 수단; 및 진폭 변조된 신호와 위상 변조된 신호를 결합하여 송출하는 수단을 포함한다.
본 발명에 의하면, 지상파 DMB 시스템에서 LP 신호에 고정 진폭 변조와 차동 이진 위상 변조를 결합한 하이브리드 변조 방식을 사용함으로써 성상 간의 거리가 크게 나타나며, 기존의 지상파 DMB 시스템의 DQPSK 변조에서 발생하는 위상 모호성 문제를 해결할 수 있다.
DMB, T-DMB, 계층 변조, 기본 계층, 향상 계층, 하이브리드 변조-
公开(公告)号：KR1020100072498A
公开(公告)日：2010-07-01
申请号：KR1020080130925
申请日：2008-12-22
Applicant: 한국전자통신연구원
CPC classification number: H04L27/3809 , H04H2201/11 , H04L27/3818
Abstract: PURPOSE: A demodulation method at a round wave digital multimedia broadcasting system with applying hybrid modulation and a device thereof are provided to improve the channel distortion of fixed amplitude modulation and differential phase modulation by using a hybrid modulation method. CONSTITUTION: A FFT module(100) transforms a signal of the time area to the signal of the frequency area. An OFDM demodulator(200) performs the OFDM demodulation about the signal which is Fourier transformed. A hybrid demodulator(300) restores a transmission signal by applying fixing to the former state the transmission signal by applying fixed amplitude modulation and differential phase modulation. A HP signal processing unit(400) comprises a DQPSK demodulator(410), a frequency deinterleaver(420), a demapper(430), a transfer frame demultiplexer(440) and a viterbi decoder(450). A LP signal processing unit comprises the frequency deinterleaver(510), the demapper(520), a transfer frame demultiplexer(530) and the viterbi decoder(540).
Abstract translation: 目的：提供一种应用混合调制的圆波数字多媒体广播系统及其装置的解调方法，通过混合调制方式改善固定幅度调制和差分相位调制的信道失真。 构成：FFT模块（100）将时间区域的信号转换为频率区域的信号。 OFDM解调器（200）对被傅立叶变换的信号进行OFDM解调。 混合解调器（300）通过施加固定的幅度调制和差分相位调制来对传输信号进行固定，从而恢复传输信号。 HP信号处理单元（400）包括DQPSK解调器（410），频率解交织器（420），解映射器（430），传输帧解复用器（440）和维特比解码器（450）。 LP信号处理单元包括频率解交织器（510），解映射器（520），传输帧解复用器（530）和维特比解码器（540）。
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公开(公告)号：KR1020100071811A
公开(公告)日：2010-06-29
申请号：KR1020080130652
申请日：2008-12-19
Applicant: 한국전자통신연구원
CPC classification number: H04L27/36 , H04H2201/11 , H04L27/3488
Abstract: PURPOSE: A hybrid modulation method and structure are provided to overcome a phase ambiguity problem which is generated in differential quadrature phase shift keying modulation by combining coherent amplitude modulation and differential binary phase shift keying. CONSTITUTION: A bit testing unit(310) confirms the set values of a first bit and a second bit from first signal which is inputted for hierarchical modulation. A first modulation unit(320) modulates the amplitude of the second signal which is inputted for a mobile broadcasting service based on the amplitude modulated value of the first bit. A second modulation unit(330) modulates the phase of the second signal in correspond with the set value of the second bit. A transmission unit combines and transmits the amplitude modulated signal and the phase modulated signal. A bit value confirmation unit(322) confirms the value of the first bit.
Abstract translation: 目的：提供混合调制方法和结构，以克服通过组合相干幅度调制和差分二进制相移键控在差分正交相移键控调制中产生的相位模糊问题。 构成：位测试单元（310）从为输入用于分层调制的第一信号确认第一位和第二位的设定值。 第一调制单元（320）基于第一比特的幅度调制值来调制为移动广播服务输入的第二信号的幅度。 第二调制单元（330）对应于第二位的设定值来调制第二信号的相位。 发送单元组合并发送调幅信号和相位调制信号。 位值确认单元（322）确认第一位的值。
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Patent Agency Ranking
公开(公告)号：KR1020100071809A
公开(公告)日：2010-06-29
申请号：KR1020080130650
申请日：2008-12-19
Applicant: 한국전자통신연구원
CPC classification number: H04L27/0012 , H04L27/2601 , H04L27/3488
Abstract: PURPOSE: A method and an apparatus for transmitting modulation mode detection signal are provided to improve the transmission rate of data using a plurality of modulation methods for a mobile broadcasting system. CONSTITUTION: A first signal processing unit(100) processes first signal which is inputted for a mobile broadcasting service. A second signal processing unit(200) processes second signal which is inputted for hierarchical modulation. A sequence insertion unit(300) combines the first signal and the second signal and divides the combined signal according to the pre-set time interval. The sequence insertion unit inserts a sequence for encoding/decoding into the divided signal. A signal detection module(350) detects a signal from the combined signal, which the hierarchical modulation is not applied, as third signal.
Abstract translation: 目的：提供一种用于发送调制模式检测信号的方法和装置，以使用用于移动广播系统的多种调制方法来提高数据的传输速率。 构成：第一信号处理单元（100）处理为移动广播服务输入的第一信号。 第二信号处理单元（200）处理输入用于分级调制的第二信号。 序列插入单元（300）组合第一信号和第二信号，并根据预设的时间间隔划分组合的信号。 序列插入单元将用于编码/解码的序列插入划分的信号。 信号检测模块（350）检测来自未被施加分级调制的组合信号的信号作为第三信号。
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公开(公告)号：KR1020090025838A
公开(公告)日：2009-03-11
申请号：KR1020070090977
申请日：2007-09-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2695 , H04H2201/11 , H04L5/0007 , H04L27/01 , H04L27/265
Abstract: An apparatus and a method for equalizing the reception channel in an OFDM(Orthogonal Frequency Division Multiplexing) transmission system and a DMB(Digital Multimedia Broadcasting) receiving apparatus applying the same are provided to improve the performance of mobile reception in a transmission system in which pilot signal is not used. A channel estimator(520) estimates channel as a symbol unit with the reference signal received from the standard signal creation part(550). A channel filtering part(530) removes the noises of the presumed channel value. A channel equalization part(540) equalizes the channel by using the estimation channel value. The channel estimator estimates the PRS(Phase Reference Symbol) of the received frame by the reference signal.
Abstract translation: 提供了一种用于均衡OFDM（正交频分复用）传输系统中的接收信道和应用其的DMB（数字多媒体广播）接收装置的装置和方法，以提高其中导频 信号不被使用。 信道估计器（520）将信道估计为具有从标准信号产生部分接收到的参考信号的符号单元（550）。 信道滤波部分（530）去除假想信道值的噪声。 信道均衡部分（540）通过使用估计信道值来均衡信道。 信道估计器通过参考信号估计接收帧的PRS（相位参考符号）。
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公开(公告)号：KR1020080112072A
公开(公告)日：2008-12-24
申请号：KR1020070108780
申请日：2007-10-29
Applicant: 한국전자통신연구원
CPC classification number: H04H60/07 , H04H20/67 , H04N21/23602 , H04N21/23614
Abstract: A method for multiplexing frame of digital broadcasting signal, apparatus thereof, and transmission apparatus are provided to fit transmission synchronization of a plurality of transmission frames including a service stream about an identical service without a separate field. An apparatus for multiplexing frame of digital broadcasting signal comprises a first buffer(611), a second buffer(612), a time comparison processing unit(630), a first frame generator(651), a second frame generator(652), and a time stamp generator(660). The first buffer stores a first service stream received from outside. The second buffer stores a second service stream received from outside. The time comparison processing unit compares a first service time data about the first service stream with a second service time data about the second service stream. The first frame generator outputs a first frame including the first service stream outputted in the first buffer. The second frame generator outputs a second frame including the second service stream outputted in the second buffer. The time stamp generator generates a first transmission time data comprised in a time stamp field of the first frame and a second transmission time data comprised in a time stamp field of the second frame.
Abstract translation: 提供数字广播信号的帧复用方法及其发送装置，以适应多个传输帧的传输同步，所述多个传输帧包括关于相同服务的服务流，而不需要单独的字段。 一种用于复用数字广播信号帧的装置包括第一缓冲器（611），第二缓冲器（612），时间比较处理单元（630），第一帧发生器（651），第二帧发生器（652）和 时间戳发生器（660）。 第一缓冲器存储从外部接收的第一服务流。 第二缓冲器存储从外部接收的第二服务流。 时间比较处理单元将关于第一服务流的第一服务时间数据与关于第二服务流的第二服务时间数据进行比较。 第一帧发生器输出包括在第一缓冲器中输出的第一服务流的第一帧。 第二帧发生器输出包括在第二缓冲器中输出的第二服务流的第二帧。 时间戳发生器产生包括在第一帧的时间戳字段中的第一传输时间数据和包括在第二帧的时间戳字段中的第二传输时间数据。
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公开(公告)号：KR1020080112063A
公开(公告)日：2008-12-24
申请号：KR1020070084848
申请日：2007-08-23
Applicant: 한국전자통신연구원
Abstract: An apparatus for receiving hierarchical modulation signal capable of efficiently decoding added signal and method thereof are provided to reduce power consumption of a receiver by reducing complexity of the receiver. A method for receiving hierarchical modulation signal capable of efficiently decoding added signal comprises the following steps: a step for receiving a hierarchical modulation signal having a plurality of layers(S201); a step for generating a first hierarchical modulation signal by differentially demodulating the hierarchical modulation signal(S203); a step for generating a first hierarchical estimated signal by estimating the first hierarchical modulation signal(S209); a step for the first hierarchical estimated signal by modulating the first hierarchical estimated signal(S211); and a step for extracting a second hierarchical modulation signal in the hierarchical modulation signal based on the first hierarchical estimated signal(S213).
Abstract translation: 提供一种用于接收能够有效地解码附加信号的分级调制信号及其方法的装置，以通过降低接收机的复杂度来降低接收机的功耗。 一种用于接收能够有效地解码附加信号的分级调制信号的方法，包括以下步骤：接收具有多个层的分级调制信号的步骤（S201）; 通过差分解调分层调制信号来生成第一分层调制信号的步骤（S203）; 通过估计第一分级调制信号产生第一分层估计信号的步骤（S209）; 通过调制第一分级估计信号来进行第一分级估计信号的步骤（S211）; 以及基于第一分级估计信号提取分级调制信号中的第二分层调制信号的步骤（S213）。
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公开(公告)号：KR1020080052459A
公开(公告)日：2008-06-11
申请号：KR1020070125885
申请日：2007-12-06
Applicant: 한국전자통신연구원
CPC classification number: H03M13/1515 , H03M13/1102 , H03M13/152 , H03M13/23 , H03M13/2732 , H03M13/2957 , H03M13/6368 , H04H20/28 , H04H20/44 , H04H20/95 , H04H40/18 , H04L27/183 , H04L27/3488 , H04L2001/0093 , H04N21/2362 , H04N21/2368 , H04N21/2383 , H04N21/2662 , H04N21/4382 , H04N21/64792
Abstract: An apparatus and a method of servicing digital multimedia broadcasting are provided to transmit the multimedia data and additional data of high quality and high transmitting efficiency. An apparatus of servicing digital multimedia broadcasting includes a base layer transmitting processor(307), an enhancement layer transmitting processor(305), and a layer transmitting unit. The base layer transmitting processor encodes the base layer stream. The enhancement layer transmitting processor encodes the enhancement layer stream. The layer transmitting unit encodes the base layer stream which is output from the base layer transmitting processor and the enhancement layer stream which is output from the enhancement layer transmitting processor and allots a predetermined bit value so as to proceed a layer symbol mapping to transmit it.
Abstract translation: 提供了一种维修数字多媒体广播的设备和方法，用于传输多媒体数据和高质量和高传输效率的附加数据。 维修数字多媒体广播的装置包括基层发送处理器（307），增强层发送处理器（305）和层发送单元。 基层发送处理器对基本层流进行编码。 增强层发送处理器对增强层流进行编码。 层发送单元对从基础层发送处理器输出的基本层流和从增强层发送处理器输出的增强层流进行编码，并分配预定的位值，以进行层符号映射以进行发送。
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