公开(公告)号：KR100445798B1

公开(公告)日：2004-08-25

申请号：KR1020020011269

申请日：2002-03-04

Applicant: 대한민국(전남대학교총장) ,  주식회사 현우맥플러스

Inventor： 김대진 ,  오영호 ,  김은도

IPC: H04N7/015 ,  H04N21/431

Abstract: PURPOSE: An apparatus for displaying threshold of visibility receivable in a ground wave digital broadcasting receiver is provided to judge a cause of bad receiving of a digital broadcast by estimating a receiving channel and calculating receivable threshold of visibility, thereby easily coping with the bad receiving. CONSTITUTION: A frame synchronization restoring unit(105) restores frame synchronization from received ground wave digital broadcasting signals. A channel estimator(106) receives the restored frame synchronous signals and estimates a channel from digital broadcasting signals corresponding to the frame synchronous signals, and outputs the estimated channel information. A TOV(Threshold Of Visibility) calculator(107) calculates the receivable TOV from the output channel information according to echo. A TOV signal converter(108) converts the calculated receivable TOV into picture signals. A main control unit(109) transmits the receivable TOV signal to a VSB(Vestigial Side Bands) demodulator(104) to be displayed on a screen.

Abstract translation: 一种用于显示地波数字广播接收机中可接收的可见度阈值的设备，用于通过估计接收频道并计算可接收的可见阈值来判断数字广播接收不良的原因，从而容易地应对不良接收。 组成：帧同步恢复单元（105）根据接收的地面波数字广播信号恢复帧同步。 信道估计器（106）接收恢复的帧同步信号，并根据与帧同步信号相对应的数字广播信号来估计信道，并输出估计的信道信息。 TOV（阈值可视性）计算器（107）根据回声从输出信道信息计算可接收的TOV。 TOV信号转换器（108）将计算的可接收TOV转换为图像信号。 主控制单元（109）将可接收的TOV信号发送到VSB（残留边带）解调器（104）以显示在屏幕上。

公开(公告)号：KR1020040025294A

公开(公告)日：2004-03-24

申请号：KR1020020057204

申请日：2002-09-19

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  김용철

IPC: H04N7/015

CPC classification number: H04L7/0335 ,  H04N5/4401 ,  H04N5/455

Abstract: PURPOSE: A digital television symbol timing synchronous algorithm is provided to square an existing Gardner method with a received signal, and to apply the squared value to a Gardner symbol timing detector, then to recover a symbol clock, thereby restoring symbol timing without frequency components. CONSTITUTION: A Gardner symbol timing recoverer using a prefilter is independently operated from a squared Gardner symbol timing recoverer. The Gardner symbol timing recoverer using the prefilter filters a signal passing through a square root cosine filter1(303) to a prefilter1(304), and uses the filtered signal as an input of a timing detector1(308). The timing detector(308) generates a timing error, amplifies an error value in an amplifier1(312), and obtains an average in a loop filter1(311), then controls parameters of an interpolation filter1(302) in an address calculator1(310). Power of a signal passing through the prefilter1(304) is measured in a power calculator1(306). A distributive calculator1(309) measures changes of the power, and controls a gain value of the amplifier1(312). The distributive calculator1(309) measures how fast a channel changes.

Abstract translation: 目的：提供数字电视符号定时同步算法，使现有的加德纳方法具有接收信号，并将平方值应用于加德纳符号定时检测器，然后恢复符号时钟，从而恢复符号定时，无需频率分量。 构成：使用预过滤器的加德纳符号定时回收器是从加纳德符号定时回收器的平方加法独立运行的。 使用预滤波器的加德纳符号定时恢复器将通过平方根余弦滤波器1（303）的信号滤波到预滤波器1（304），并且使用经滤波的信号作为定时检测器1的输入（308）。 定时检测器（308）产生定时误差，放大放大器1中的误差值（312），并获得环路滤波器1（311）中的平均值，然后控制地址计算器1（310）中的内插滤波器1（302）的参数 ）。 在功率计算器1（306）中测量通过预滤器1（304）的信号的功率。 分配计算器1（309）测量功率的变化，并控制放大器1的增益值（312）。 分布式计算器1（309）测量通道改变的速度。

公开(公告)号：KR1020030072431A

公开(公告)日：2003-09-15

申请号：KR1020020011269

申请日：2002-03-04

Applicant: 대한민국(전남대학교총장) ,  주식회사 현우맥플러스

Inventor： 김대진 ,  오영호 ,  김은도

IPC: H04N7/015 ,  H04N21/431

CPC classification number: H04N5/455 ,  H04B17/318 ,  H04L25/024 ,  H04N5/44513 ,  H04N2005/44517

Abstract: PURPOSE: An apparatus for displaying threshold of visibility receivable in a ground wave digital broadcasting receiver is provided to judge a cause of bad receiving of a digital broadcast by estimating a receiving channel and calculating receivable threshold of visibility, thereby easily coping with the bad receiving. CONSTITUTION: A frame synchronization restoring unit(105) restores frame synchronization from received ground wave digital broadcasting signals. A channel estimator(106) receives the restored frame synchronous signals and estimates a channel from digital broadcasting signals corresponding to the frame synchronous signals, and outputs the estimated channel information. A TOV(Threshold Of Visibility) calculator(107) calculates the receivable TOV from the output channel information according to echo. A TOV signal converter(108) converts the calculated receivable TOV into picture signals. A main control unit(109) transmits the receivable TOV signal to a VSB(Vestigial Side Bands) demodulator(104) to be displayed on a screen.

Abstract translation: 目的：提供一种在地面波数字广播接收机中显示可见度阈值的装置，用于通过估计接收信道和计算可见度的可接受阈值来判断数字广播的接收不良的原因，从而容易地应对不良接收。 构成：帧同步恢复单元（105）从接收到的地面波数字广播信号恢复帧同步。 信道估计器（106）接收恢复的帧同步信号并从对应于帧同步信号的数字广播信号估计信道，并输出估计的信道信息。 TOV（可视阈值）计算器（107）根据回波从输出信道信息计算可接收TOV。 TOV信号转换器（108）将所计算的可接收TOV转换为图像信号。 主控制单元（109）将可接收的TOV信号发送到VSB（残留边带）解调器（104），以在屏幕上显示。

公开(公告)号：KR1020010000425A

公开(公告)日：2001-01-05

申请号：KR1020000056881

申请日：2000-09-28

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  양문환 ,  염승기

IPC: A61B5/055

Abstract: PURPOSE: A RF variable filter circuit in a magnetic resonant imaging modem by a tracking filter is provided to filter intensities of all magnetic fields by a simple operation regardless of an intensity of a magnetic field. CONSTITUTION: An erasable and programmable read only memory(1) and a digital/analog converter(2) are connected to each other in series and support various intensities of magnetic fields. The erasable and programmable read only memory(1) and digital/analog converter(2) are inserted into a frequency variable tracking filter(3) which changes a frequency. The digital/analog converter(2) converts data stored in erasable and programmable read only memory(1) into an analog signal. The analog signal from the digital/analog converter(2) is provided to the frequency variable tracking filter(3). The frequency variable tracking filter(3) controls the analog signal from the digital/analog converter(2) according to a control signal. The control signal includes a resonant frequency signal suitable to each magnetic field and element.

Abstract translation: 目的：提供通过跟踪滤波器在磁共振成像调制解调器中的RF可变滤波器电路，通过简单的操作来滤除所有磁场的强度，而不管磁场的强度如何。 构成：可擦除可编程只读存储器（1）和数字/模拟转换器（2）彼此串联连接，并支持各种强度的磁场。 可擦除可编程只读存储器（1）和数字/模拟转换器（2）被插入到频率变化跟踪滤波器（3）中，频率变化跟踪滤波器（3）改变频率。 数字/模拟转换器（2）将存储在可擦除和可编程只读存储器（1）中的数据转换为模拟信号。 来自数字/模拟转换器（2）的模拟信号被提供给频率可变跟踪滤波器（3）。 频率可变跟踪滤波器（3）根据控制信号控制来自数/模转换器（2）的模拟信号。 控制信号包括适合于每个磁场和元件的谐振频率信号。

公开(公告)号：KR1020010000424A

公开(公告)日：2001-01-05

申请号：KR1020000056880

申请日：2000-09-28

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  강근원

IPC: H04B1/40

CPC classification number: H04M1/0256 ,  H04M1/7253 ,  H04M2250/02

Abstract: PURPOSE: The method for dividedly using a RF transceiver and a user interface part of a cellular phone with blue-tooth is provided to reduce the weight and the cost of the cellular phone, to remove the adverse effect of electromagnetic wave, and to make the interface part have various designs like an accessory, by enabling the interface part to be carried in hand and the RF transceiver to be portable separately. CONSTITUTION: A RF transceiver part(1) connected to a battery, includes a receiver part(1a), a transmission part(1b) and a voice synthesizing part(1c). A demodulation part(2) includes a digital processing system(2b), a micro-controller unit(2c) and a blue-tooth module(2a). A user interface part(4) includes a blue-tooth module(4a), a speaker(4b), a key pad(4c), a liquid crystal display part(4d) and an additional function part(4e). The user interface part(4) further includes a microphone part(4f), a small battery(4g) and an interface part antenna(5'). The demodulation part(2) communicates with the user interface part(4) by a short distance radio signal. An antenna(5) is connected to the RF transceiver part(1).

Abstract translation: 目的：为了减少手机的重量和成本，消除电磁波的不利影响，分别使用RF收发器和蓝牙手机的用户界面部分， 接口部分具有诸如附件的各种设计，通过使接口部分能够携带并且RF收发器能够单独携带。 构成：连接到电池的RF收发器部分（1）包括接收器部分（1a），传输部分（1b）和语音合成部分（1c）。 解调部分（2）包括数字处理系统（2b），微控制器单元（2c）和蓝牙模块（2a）。 用户接口部分（4）包括蓝牙模块（4a），扬声器（4b），键盘（4c），液晶显示部分（4d）和附加功能部分（4e）。 用户接口部分（4）还包括麦克风部分（4f），小电池（4g）和接口部分天线（5'）。 解调部分（2）通过短距离无线电信号与用户接口部分（4）进行通信。 天线（5）连接到RF收发器部分（1）。

公开(公告)号：KR1020040025009A

公开(公告)日：2004-03-24

申请号：KR1020020056793

申请日：2002-09-18

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  오영호 ,  박성우

IPC: H04N7/015

CPC classification number: H04L25/03267 ,  H04L1/0047 ,  H04L2025/03458 ,  H04L2025/03636 ,  H04L2201/06 ,  H04N5/4401

Abstract: PURPOSE: A grid type channel equalizer in connection with a viterbi decoder is provided to connect with a viterbi decoder, and to couple with an LMS decision feedback channel equalizer, then to automatically select an equalizer having a small output error, thereby improving channel equalization performance in a blind mode and removing signal distortions. CONSTITUTION: An LMS decision feedback channel equalizer(321) uses LMS algorithm by updating equalizer tap coefficients. A grid type decision feedback channel equalizer(322) uses a grid type for channel equalization. An error measurer(323) using segment synchronization measures errors of each equalizer output by using ATSC segment synchronization for output errors of the LMS decision feedback channel equalizer(321) and the grid type decision feedback channel equalizer(322). An equalizer output selector(324) automatically selects an equalizer having a small error based on measured results of the error measurer(323). A viterbi decoder(325) corrects a transmission error in a blind mode.

Abstract translation: 目的：提供与维特比解码器相关的网格型信道均衡器与维特比解码器连接，并与LMS判决反馈信道均衡器耦合，然后自动选择具有小输出误差的均衡器，从而提高信道均衡性能 处于盲模式并消除信号失真。 构成：LMS决策反馈信道均衡器（321）通过更新均衡器抽头系数来使用LMS算法。 网格型判决反馈信道均衡器（322）使用网格类型进行信道均衡。 使用段同步的误差测量器（323）通过对LMS判决反馈信道均衡器（321）和网格类型判定反馈信道均衡器（322）的输出错误使用ATSC段同步来测量每个均衡器输出的误差。 均衡器输出选择器（324）基于误差测量器的测量结果（323）自动选择具有小误差的均衡器。 维特比解码器（325）在盲模式下校正传输错误。

公开(公告)号：KR1020030097192A

公开(公告)日：2003-12-31

申请号：KR1020020034453

申请日：2002-06-20

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  오영호 ,  박성우 ,  이경원

IPC: H04N7/015

CPC classification number: H04L25/03267 ,  H04L1/006 ,  H04L25/03019 ,  H04N5/4401

Abstract: PURPOSE: A fast recursive least square-decision feedback equalizer interworking with a least mean square-decision feedback equalizer is provided to realize a channel equalizer interworking a restarting fast recursive least square-decision feedback equalizer with a least mean square-decision feedback equalizer. CONSTITUTION: An LMS(least mean square) equalizer filter(502) receives and filters external input signals, decided data, and an error calculated value by using updated coefficients and segment synchronization. A restart fast kalman tap coefficient updating unit(501) updates coefficients. A trellis decoder(504) reduces a decision error from signals output from the LMS equalizer filter. An error calculating unit(505) calculates the error value by using each output value of the LMS equalizer filter and segment synchronization.

Abstract translation: 目的：提供与最小均方决策反馈均衡器相互作用的快速递归最小二乘决策反馈均衡器，以实现信道均衡器与最小均方决策反馈均衡器重新启动快速递归最小二乘判决反馈均衡器的互通。 构成：LMS（最小均方）均衡器滤波器（502）通过使用更新的系数和段同步来接收和滤除外部输入信号，确定的数据和误差计算值。 重启快速卡尔曼抽头系数更新单元（501）更新系数。 网格解码器（504）从LMS均衡器滤波器输出的信号中减少判定误差。 误差计算单元（505）通过使用LMS均衡器滤波器的每个输出值和段同步来计算误差值。