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1. 发明申请

US20150206018A1 SYSTEM AND METHOD FOR RECOGNIZING SPEED LIMIT SIGN USING FRONT CAMERA 有权
标题翻译：用于识别使用前置摄像机的速度限制标志的系统和方法
公开(公告)号：US20150206018A1
公开(公告)日：2015-07-23
申请号：US14267338
申请日：2014-05-01
申请人： Young Ha Cho , Chae Seok Lim , Min Woo Park
发明人： Young Ha Cho , Chae Seok Lim , Min Woo Park
IPC分类号： G06K9/00 , G06K9/62
CPC分类号： G06K9/00818 , G06K9/6256 , G06K9/6269
摘要： Disclosed herein are a speed limit sign recognition system and method using a front camera which can track a traffic sign continuously appearing in images which are obtained by a photographing speed limit sign located in front of a driver using a camera mounted on the front of the vehicle, recognize an internal numeral of the traffic sign, and inform the driver of an actual limit speed through the recognized numeral, including: an image acquisition unit for acquiring a front image using a front camera; a traffic sign detector for detecting a traffic sign from the acquired front image; a recognition unit for recognizing an internal numeral in the detected traffic sign; a tracking unit for tracking a traffic sign continuously appearing in the front image, and eliminating a temporarily misrecognized object; and a decision unit for determining a result of speed limit recognition on the recognized traffic sign.
摘要翻译：这里公开了一种限速识别系统和方法，其使用前置摄像机，其可以跟踪连续出现在图像中的交通标志，所述交通标志是通过使用安装在车辆前方的照相机位于驾驶员前方的摄影限速符号获得的识别交通标志的内部数字，并通过所识别的数字通知驾驶员实际的极限速度，包括：图像获取单元，用于使用前置摄像机获取前方图像; 交通标志检测器，用于从所获取的前方图像检测交通标志; 识别单元，用于识别检测到的交通标志中的内部数字; 跟踪单元，用于跟踪连续出现在前方图像中的交通标志，并消除暂时被误认识的对象; 以及用于确定所识别的交通标志上的速度限制识别结果的决定单元。

2. 发明授权

US07869495B2 OFDM receiver using time-domain and frequency-domain equalizing and time domain equalizer 有权
标题翻译： OFDM接收机使用时域和频域均衡和时域均衡器
公开(公告)号：US07869495B2
公开(公告)日：2011-01-11
申请号：US11945593
申请日：2007-11-27
申请人： Young Ha Cho , Kyung Uk Kim , Hyun Suk Lee
发明人： Young Ha Cho , Kyung Uk Kim , Hyun Suk Lee
IPC分类号： H03K7/30
CPC分类号： H04L25/03159 , H04L25/03038 , H04L27/2662 , H04L2025/03414 , H04L2025/03541 , H04L2025/03617
摘要： An orthogonal frequency division multiplexing (OFDM) receiver capable of improving equalization performance is provided. In the OFDM receiver receiving an OFDM signal having a frame structure constructed with one reference symbol and a plurality of data symbols following the reference symbol, the OFDM receiver includes: a synchronizer which detects a position of the reference symbol from the received OFDM signal; a time-domain equalizer which equalizes in a time domain the data symbols that are separated by a distance longer than a predetermined distance from the position of the reference symbol; an FFT (fast Fourier transform) unit which performs an FFT process on the OFDM signal; and a frequency-domain equalizer which equalizes in a frequency domain the data symbols that are separated by a distance shorter than a predetermined distance from the position of the reference symbol.
摘要翻译：提供能够提高均衡性能的正交频分复用（OFDM）接收机。在OFDM接收机中，OFDM接收机接收具有由一个参考符号构成的帧结构的OFDM信号和该参考符号之后的多个数据符号，OFDM接收机包括：同步器，其从接收的OFDM信号中检测参考符号的位置; 时域均衡器，其在时域中均衡与参考符号的位置相距一定距离的距离的数据符号; 对OFDM信号执行FFT处理的FFT（快速傅里叶变换）单元; 以及频域均衡器，其在频域上均衡距离参考符号的位置小于预定距离的距离的数据符号。

3. 发明授权

US07903771B2 Time-domain IQ mismatch detection apparatus of OFDM receiver 失效
标题翻译： OFDM接收机的时域IQ失配检测装置
公开(公告)号：US07903771B2
公开(公告)日：2011-03-08
申请号：US11947508
申请日：2007-11-29
申请人： Young Ha Cho , Kyung Uk Kim , Bon Young Koo
发明人： Young Ha Cho , Kyung Uk Kim , Bon Young Koo
IPC分类号： H03D1/04
CPC分类号： H04L27/2647 , H04B1/30 , H04L27/3863
摘要： A time-domain IQ mismatch detection apparatus for detecting mismatch between an I-channel signal and a Q-channel signal in unit of a sample included in a symbol of an OFDM signal comprises: a first delayer which delays an input I-channel signal by one sample interval; a second delayer which delays an input Q-channel signal by one sample interval; a first phase mismatch detector which multiplies a currently-input I-channel signal with a currently-input Q-channel signal and output a result thereof; a second phase mismatch detector which multiplies the currently-input I-channel signal and the delayed Q-channel signal and output a result thereof; a third phase mismatch detector which multiplies the delayed I-channel signal with the currently-input Q-channel signal and output a result thereof; and a phase error arithmetic unit which outputs a phase error value calculated using the outputs of the first, second and third phase mismatch detectors.
摘要翻译：用于检测包含在OFDM信号的符号中的样本的I信道信号和Q信道信号之间的失配的时域IQ失配检测装置包括：第一延迟器，其将输入的I信道信号延迟一个采样间隔; 第二延迟器，其将输入Q信道信号延迟一个采样间隔; 第一相位不匹配检测器，其将当前输入的I信道信号与当前输入的Q信道信号相乘并输出其结果; 第二相位不匹配检测器，其将当前输入的I信道信号和延迟的Q信道信号相乘并输出其结果; 第三相位不匹配检测器，将延迟的I信道信号与当前输入的Q信道信号相乘，并输出其结果; 以及相位误差运算单元，输出使用第一，第二和第三相位不匹配检测器的输出计算出的相位误差值。

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