-
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）。
-
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。
-
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）。
-
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。
-
-
-
Search Results
74
records
(took 0.022 seconds)
