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    • 3. 发明授权
    • Method and apparatus for measuring distance using low clock rate signal
    • 使用低时钟速率信号测量距离的方法和装置
    • US07518546B2
    • 2009-04-14
    • US11369724
    • 2006-03-08
    • Jae-hyon KimYoung-hwan KimDmitriev S. AlexanderAndreyev V. YuriSeong-soo Lee
    • Jae-hyon KimYoung-hwan KimDmitriev S. AlexanderAndreyev V. YuriSeong-soo Lee
    • G01S13/08
    • G01S13/76
    • Provided is an apparatus and a method of measuring a distance between devices using a low clock frequency signal. The apparatus includes clock frequency generators, counters, a controller and a calculator for determining the distance based on clock signal overlap. Radio waves are transmitted and a number of clocks of a clock signal having a clock frequency b are counted, and if the transmitted radio waves are received again, a number of clocks of a clock signal having a clock frequency a are counted. If the clock signals having the clock frequencies a and b overlap with each other, counting of the numbers of the clocks of the clock signals having the frequencies b and a stops, and the distance is measured using the count values of the clock signals having the clock frequencies a and b. As a result, number of clocks of clock signals having low clock frequencies with a uniform difference can be counted to precisely measure a distance.
    • 提供了使用低时钟频率信号来测量设备之间的距离的装置和方法。 该装置包括时钟频率发生器,计数器,控制器和用于基于时钟信号重叠确定距离的计算器。 对无线电波进行发送,对具有时钟频率b的时钟信号的时钟数进行计数,并且如果再次接收到发送的无线电波,则对具有时钟频率a的时钟信号的时钟数进行计数。 如果具有时钟频率a和b的时钟信号彼此重叠,则具有频率b和a的时钟信号的时钟数的计数停止,并且使用具有频率b和a的时钟信号的计数值来测量距离 时钟频率a和b。 结果,可以计数具有均匀差的具有低时钟频率的时钟信号的时钟数,以精确地测量距离。
    • 7. 发明授权
    • Wireless communication system for reducing ranging time
    • 无线通信系统,减少测距时间
    • US07787516B2
    • 2010-08-31
    • US11501829
    • 2006-08-10
    • Jae-hyon KimYoung-hwan KimSeong-soo LeeJoonhyuk KangJaehwan KimYungil Kim
    • Jae-hyon KimYoung-hwan KimSeong-soo LeeJoonhyuk KangJaehwan KimYungil Kim
    • H04B1/00
    • H04B1/7183H04B1/692H04B1/71637H04B2001/6908
    • A wireless communication system and a method for reducing a ranging time. The communication system includes a main synchronization block group which processes the transceived signal and determines whether the transceived signal is a signal desired by a transmitting device when a receiving device re-transmits the transceived signal to the transmitting device; a ranging block which measures a distance between the transmitting device and the receiving device using a ranging signal when the transceived signal is the desired signal of the transmitting device based on the determination of the main synchronization block group and when the transceived signal is the ranging signal; and a symbol synchronization block which detects a start point and an end point of a symbol forming the signal when the transceived signal from the receiving device is a data communication signal. Accordingly, the fast ranging is feasible and channel occupation time can be shortened.
    • 一种无线通信系统和减少测距时间的方法。 所述通信系统包括:主同步块组,其处理所述收发信号,并且当接收设备将所述收发信号重新发送到所述发送设备时,确定所述收发信号是否为发送设备所期望的信号; 测距块,其基于主同步块组的确定以及当发送的信号是测距信号时,当发送信号是发送设备的期望信号时,使用测距信号来测量发送设备和接收设备之间的距离 ; 以及符号同步块,其当来自接收装置的收发信号是数据通信信号时,检测形成信号的符号的起始点和终点。 因此,快速测距是可行的,可以缩短通道占用时间。
    • 9. 发明申请
    • APPARATUS AND METHOD FOR DECODING SPACE-TIME BLOCK CODED (STBC) SIGNAL
    • 用于解码空间块编码(STBC)信号的装置和方法
    • US20080292030A1
    • 2008-11-27
    • US11863335
    • 2007-09-28
    • Jae-hyon KIMYoung-hwan KimHyuncheol ParkHyunkuk KimWonjae Shin
    • Jae-hyon KIMYoung-hwan KimHyuncheol ParkHyunkuk KimWonjae Shin
    • H03D1/00H04L27/06
    • H04L25/0246H04L1/0631H04L25/03006H04L2025/03426H04L2025/03605
    • Apparatus and method for decoding a Space-Time Block Coded (STBC) signal. The decoding apparatus includes a channel estimator for estimating a real equivalent channel based on a coded signal; a channel converter for decomposing the real equivalent channel to a unit matrix and a subchannel; a receive signal converter for converting the coded signal to a real equivalent receive signal and converting the real equivalent receive signal to a converted receive signal based on the unit matrix; and a detector for detecting an estimate of a transmit signal by performing a maximum likelihood decoding using the converted receive signal and the subchannel. Since the transmit signal candidates are independent of each other, the complexity of the maximum likelihood decoding can be decreased. With the lowered complexity of the receiver, the power consumption for the decoding can be reduced and the high-speed data can be transmitted more easily in the actual mobile communication environment.
    • 用于解码空时块编码(STBC)信号的装置和方法。 解码装置包括用于基于编码信号估计实际等效信道的信道估计器; 用于将实际等效信道分解为单位矩阵和子信道的信道转换器; 接收信号转换器,用于将编码信号转换为实际等效接收信号,并且基于单位矩阵将实际等效接收信号转换为转换的接收信号; 以及检测器,用于通过使用转换的接收信号和子信道执行最大似然解码来检测发射信号的估计。 由于发送信号候选是彼此独立的,所以可以减小最大似然解码的复杂度。 随着接收机的复杂性降低,可以减少解码的功耗,并且可以在实际的移动通信环境中更容易地发送高速数据。