公开(公告)号：US20090168937A1

公开(公告)日：2009-07-02

申请号：US12137463

申请日：2008-06-11

申请人： U Sang LEE ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

发明人： U Sang LEE ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

IPC分类号： H04L7/00

CPC分类号： H04L7/043 ,  H04B1/7075

摘要： There is provided an RF receiver recovering timing offset by shifting timing slots in response to timing offset occurring when a signal is sampled. An RF receiver having timing offset recovery function according to an aspect of the invention includes: a preprocessing unit sampling and digitalizing an analog received signal; a differential operation unit delaying the digitalized received signal from the preprocessing unit for predetermined periods of time and differentiating the delayed signals; a correlation unit correlating the differentiated received signals from the differential operation unit with a plurality of predetermined PN code sequences and sequentially outputting correlation values; a setting unit sequentially storing the correlation values from the correlation unit, detecting a maximum value among the stored correlation values, and shifting a plurality of determination slots by a difference between a storage location of the detected maximum value and a reference storage location; and a demodulation value estimation unit estimating as a demodulation value of the received signal, a symbol of a PN code sequence corresponding to the maximum value from the shifted determination slots.

摘要翻译： 提供了一种RF接收器，通过响应于在采样信号时发生的定时偏移来移位定时时隙来恢复定时偏移。 具有根据本发明的一个方面的具有定时偏移恢复功能的RF接收机包括：预处理单元，对模拟接收信号进行采样和数字化; 差分操作单元延迟来自预处理单元的数字化接收信号预定时间段并且对延迟信号进行微分; 相关单元，将来自差分操作单元的差分接收信号与多个预定PN码序列相关，并且顺序地输出相关值; 设置单元，其顺序地存储来自所述相关单元的相关值，检测所存储的相关值中的最大值，并且通过所检测的最大值的存储位置与参考存储位置之间的差移动多个确定时隙; 以及解调值估计单元，作为所述接收信号的解调值，从所述移位的确定时隙估计与所述最大值对应的PN码序列的符号。

公开(公告)号：US20080101516A1

公开(公告)日：2008-05-01

申请号：US11925121

申请日：2007-10-26

申请人： Koon Shik Cho ,  Seung Han Ko ,  Jae Hyung Lee ,  Kwang Mook Lee ,  Sang Hyun Min ,  Sang Ho Lee ,  U Sang Lee

发明人： Koon Shik Cho ,  Seung Han Ko ,  Jae Hyung Lee ,  Kwang Mook Lee ,  Sang Hyun Min ,  Sang Ho Lee ,  U Sang Lee

IPC分类号： H04L7/02

CPC分类号： H04L7/08

摘要： Provided is a synchronization device for wireless communication packets, the synchronization device including an A/D (analog/digital) converter that converts an analog input signal applied from outside into a digital signal; a correlation calculating section that is connected to the A/D converter and correlates the converted input signal with a preset reference code so as to calculate a correlation value; a threshold setting section that is connected to the correlation calculating section and sets a threshold value of the correlation value; a maximum correlation detecting section that is connected to the correlation calculating section and the threshold setting section, compares the correlation value with the threshold value, detects the position of the maximum correlation value within each symbol of the input signal when the correlation value is larger than the threshold value, and judges whether a difference in position between the maximum correlation values of consecutive symbols is equal to the period of one symbol or not; a preamble detecting section that is connected to the correlation calculating section and the maximum correlation detecting section and outputs a preamble detection signal when the difference is equal to the period of one symbol; and a data detecting section that receives data of the input signal when the preamble detection signal is applied.

摘要翻译： 提供了一种用于无线通信分组的同步装置，该同步装置包括将从外部施加的模拟输入信号转换为数字信号的A / D（模拟/数字）转换器; 相关计算部分，连接到A / D转换器，并将转换的输入信号与预置的参考码相关联，以便计算相关值; 阈值设定部，与相关计算部连接并设定相关值的阈值; 连接到相关计算部分和阈值设定部分的最大相关检测部分将相关值与阈值进行比较，当相关值大于该值时，检测输入信号的每个符号内的最大相关值的位置 阈值，并且判断连续符号的最大相关值之间的位置差是否等于一个符号的周期; 前同步码检测部，其连接到所述相关计算部和所述最大相关检测部，并且当所述差等于一个符号的周期时，输出前同步码检测信号; 以及数据检测部分，当应用前导码检测信号时，接收输入信号的数据。

公开(公告)号：US08184742B2

公开(公告)日：2012-05-22

申请号：US12137463

申请日：2008-06-11

申请人： U Sang Lee ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

发明人： U Sang Lee ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L7/043 ,  H04B1/7075

摘要： A preprocessing unit samples and digitalizes analog signal. A differential operation unit delays digitalized signal for a predetermined period and differentiates delayed signals. A correlation unit correlates differentiated signal with a plurality of predetermined PN code sequences. A setting unit includes a shift register having a plurality of storage locations for shifting the correlation values and sequentially storing shifted correlation values at the storage locations, respectively, a detector including the determination slots for detecting the storage location of the maximum value, and a slot setter for comparing the storage location of the maximum value from the detector with the predetermined reference storage location and shifting the determination slots by the difference therebetween. A demodulation value estimation unit estimates, as a demodulation value of the received analog signal, a symbol of a PN code sequence corresponding to the maximum value from the shifted determination slots.

摘要翻译： 预处理单元对模拟信号进行采样和数字化。 差分操作单元在预定时间段内延迟数字化信号并区分延迟信号。 相关单元将微分信号与多个预定PN码序列相关联。 一个设置单元包括一个移位寄存器，它具有多个存储位置，用于移位相关值，并分别在存储位置依次存储偏移的相关值;检测器，包括用于检测最大值的存储位置的确定时隙; 用于将来自检测器的最大值的存储位置与预定参考存储位置进行比较，并且将确定时隙移位其间的差。 解调值估计单元从所述移位的确定时隙估计与所接收的模拟信号的解调值相对应的最大值的PN码序列的符号。

公开(公告)号：US20100110913A1

公开(公告)日：2010-05-06

申请号：US12347846

申请日：2008-12-31

申请人： Sang Hyun Min ,  Soon Jin Choi ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

发明人： Sang Hyun Min ,  Soon Jin Choi ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

IPC分类号： H04L12/26

CPC分类号： H04B17/345 ,  H04L43/16

摘要： The present invention relates to a method for detecting interference and an interference detecting device for a wireless communication capable of improving detection accuracy of an interference signal in a wireless communication device without influencing network operation while the interference signal is detected; and, more particularly, to a method for detecting interference and an interference detecting device for a wireless communication to determine an interference signal by increasing an interference packet count according to an RSSI value, its own packet detection, gain reduction, deterioration of signal quality, the number of the same symbols, and so on and comparing an increased interference packet count value with a threshold value by using each ZigBee device as a main constituent of interference detection unlike a conventional method for detecting interference in which a ZigBee coordinator or a ZigBee router is a main constituent of interference detection.

摘要翻译： 本发明涉及一种用于检测干扰的方法和用于无线通信的干扰检测装置，其能够在检测到干扰信号的同时不影响网络操作，提高无线通信装置中的干扰信号的检测精度; 更具体地，涉及一种用于检测干扰的方法和用于无线通信的干扰检测装置，以通过根据RSSI值，其自身的分组检测，增益减小，信号质量的劣化增加干扰分组计数来确定干扰信号， 相同符号的数量等，并且通过使用每个ZigBee设备作为干扰检测的主要成分，将增加的干扰分组计数值与阈值进行比较，这与传统的用于检测干扰的方法不同，ZigBee协调器或ZigBee路由器 是干扰检测的主要成分。

公开(公告)号：US20090083571A1

公开(公告)日：2009-03-26

申请号：US12104956

申请日：2008-04-17

申请人： Koon Shik Cho ,  Seung Han Ko ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

发明人： Koon Shik Cho ,  Seung Han Ko ,  Jae Hyung Lee ,  Sang Ho Lee ,  Kwang Mook Lee

IPC分类号： G06F1/04

CPC分类号： G06F1/3203 ,  G06F1/324 ,  G06F1/3287 ,  Y02D10/126 ,  Y02D10/171 ,  Y02D50/20

摘要： There are provided a system on chip (SoC) with a low power mode and a method of driving the SoC, the SoC including: a power part supplying a main clock signal and controlling analog and digital power supply at a normal mode and supplying a sub clock signal and turning analog power off at a low power mode; a radio frequency (RF) part generating the main clock signal at the normal mode and stopping operation at the low power mode, under the control of the power part; and a control part operating according to the main clock signal at the normal mode and operating according to the sub clock signal, under to the control of the power part.

摘要翻译： 提供了具有低功率模式的片上系统（SoC）和驱动SoC的方法，SoC包括：提供主时钟信号的电源部分，并以正常模式控制模拟和数字电源，并提供子 时钟信号，并在低功耗模式下关闭模拟电源; 在功率部分的控制下，以正常模式产生主时钟信号并在低功率模式下停止操作的射频（RF）部分; 以及控制部，其在正常模式下根据主时钟信号进行工作，并根据子时钟信号在功率部分的控制下工作。

公开(公告)号：US20130135910A1

公开(公告)日：2013-05-30

申请号：US13591580

申请日：2012-08-22

申请人： Sang Hyun MIN ,  Koon Shik Cho ,  Jae Hyung Lee ,  Kwang Mook Lee

发明人： Sang Hyun MIN ,  Koon Shik Cho ,  Jae Hyung Lee ,  Kwang Mook Lee

IPC分类号： G05F1/70 ,  H02M7/06

CPC分类号： H02M1/4225 ,  H02M2001/0003 ,  Y02B70/126 ,  Y02P80/112

摘要： There are provided a power factor correction apparatus, a direct current/direct current (DC/DC) converter, and a power supplying apparatus, capable of preventing unstable feedback control due to a ripple component by controlling power switching based on a median value between a maximum value and a minimum value of a voltage level of the output power that is received as feedback. The power factor correction apparatus includes a power factor corrector switching input power and correcting a power factor thereof; and a controller detecting a voltage level of power factor-corrected power and controlling the switching of the power factor corrector, based on a median value between a maximum value and a minimum value of the voltage level of the power factor-corrected power detected for a predetermined period of time.

摘要翻译： 提供了功率因数校正装置，直流/直流（DC / DC）转换器和供电装置，其能够通过基于中间值控制功率切换来防止由于纹波分量引起的不稳定的反馈控制 作为反馈接收的输出功率的电压电平的最大值和最小值。 功率因数校正装置包括功率因数校正器切换输入功率并校正其功率因数; 以及控制器，其基于所检测的功率因数校正功率的电压电平的最大值和最小值之间的中值，检测功率因数校正功率的电压电平并控制功率因数校正器的切换， 预定时间段。

公开(公告)号：US07643579B2

公开(公告)日：2010-01-05

申请号：US11457116

申请日：2006-07-12

申请人： Sang Hyun Min ,  Tah Joon Park ,  U Sang Lee ,  Koon Shik Cho ,  Kwang Mook Lee

发明人： Sang Hyun Min ,  Tah Joon Park ,  U Sang Lee ,  Koon Shik Cho ,  Kwang Mook Lee

IPC分类号： H04L27/22 ,  H03D3/22 ,  H04L27/06

CPC分类号： H04B14/06 ,  H04W84/10

摘要： The present invention relates to a multiple differential demodulator using a weighting value. The multiple differential demodulator according to the present invention includes a weighting value generator for integrating a real part and an imaginary part of a value acquired by multiplying one of a plurality of differentiated reception signals by a conjugated value of a differentiated PN code signal corresponding to a preset symbol, and determining the greater of the integrated real and integrated imaginary parts to apply a predetermined weighting value to the greater value, where the PN code signal is differentiated in the same fashion as the differentiated reception signals.

摘要翻译： 本发明涉及使用加权值的多重差分解调器。 根据本发明的多重差分解调器包括一个加权值产生器，用于将通过将多个差分接收信号中的一个相乘而得到的值的实部和虚部进行积分，该复数值与对应于 并且确定积分的实数和积分虚部中的较大者，以将预定加权值应用于较大值，其中PN码信号以与差分接收信号相同的方式进行微分。

公开(公告)号：US07558346B2

公开(公告)日：2009-07-07

申请号：US11427771

申请日：2006-06-29

申请人： Sang Hyun Min ,  Hyung Jin Choi ,  Jung Su Han ,  Joo Hyun Do ,  Tah Joon Park ,  Kwang Mook Lee ,  Koon Shik Cho ,  U Sang Lee

发明人： Sang Hyun Min ,  Hyung Jin Choi ,  Jung Su Han ,  Joo Hyun Do ,  Tah Joon Park ,  Kwang Mook Lee ,  Koon Shik Cho ,  U Sang Lee

IPC分类号： H04B1/00 ,  H04L27/06

CPC分类号： H04L27/2657 ,  H04B1/708 ,  H04B1/709 ,  H04L27/261 ,  H04L27/2675

摘要： The invention relates to a symbol detector for detecting symbols received in a receive modem of short-range wireless personal area network of a ZigBee system (IEEE 802.15.4). An OQPSK short-range wireless communication system according to the invention acquires frequency offset in a received signal using a symbol contained in a preamble of a packet of the signal, multi-delay-differentiates the signal by a plurality of predetermined delay times, and complex-conjugates the acquired frequency offset to eliminate the frequency offset. Then, the OQPSK short-range wireless communication system according to the invention correlates the received signal with a PN sequence delay-differentiated through the same process to detect the symbols corresponding to the received signal.

摘要翻译： 本发明涉及一种用于检测在ZigBee系统（IEEE 802.15.4）的短距离无线个域网的接收调制解调器中接收的符号的符号检测器。 根据本发明的OQPSK短距离无线通信系统使用包含在信号分组的前导码中的符号来获取接收信号中的频率偏移，将信号多延迟多个预定延迟时间，并且复数 收集频率偏移以消除频率偏移。 然后，根据本发明的OQPSK短距离无线通信系统将接收到的信号与通过相同处理延迟差分的PN序列相关，以检测对应于接收信号的符号。

公开(公告)号：US07496156B2

公开(公告)日：2009-02-24

申请号：US11330212

申请日：2006-01-12

申请人： U Sang Lee ,  Tah Joon Park ,  Kwang Mook Lee ,  Sang Hyun Min

发明人： U Sang Lee ,  Tah Joon Park ,  Kwang Mook Lee ,  Sang Hyun Min

IPC分类号： H04L27/00

CPC分类号： H04L7/0334 ,  H04L7/042 ,  H04L7/046

摘要： The invention relates to a receiver having a digital timing recovery function. The receiver of the invention detects frequency offset of a received signal by using symbol correlation between the received signal and a reference signal, and increases/decreases the number of data samples according to the detected frequency offset, thereby recovering symbol timing of the received signal.

摘要翻译： 本发明涉及具有数字定时恢复功能的接收机。 本发明的接收机通过使用接收信号和参考信号之间的符号相关来检测接收信号的频偏，并且根据检测到的频率偏移增加/减少数据样本数，从而恢复接收信号的符号定时。

公开(公告)号：US07957452B2

公开(公告)日：2011-06-07

申请号：US12098396

申请日：2008-04-04

申请人： Sang Hyun Min ,  Koon Shik Cho ,  Jae Hyung Lee ,  Kwang Mook Lee

发明人： Sang Hyun Min ,  Koon Shik Cho ,  Jae Hyung Lee ,  Kwang Mook Lee

IPC分类号： H04B1/707

CPC分类号： H04B1/707 ,  H04J13/004

摘要： A direct sequence spread spectrum (DSSS) transceiver including a DSSS transmitter and a DSSS receiver, wherein the DSSS transmitter includes: an integral code mapping unit mapping source bit data in one of 2N (N is a natural number) of predetermined symbols by N bits and mapping the symbol in one of integral code words that are obtained by previously integrating each of 2N of bi-orthogonal code words; and a radio frequency (RF) transmitting unit transmitting the integral code words mapped by the integral code mapping unit over an RF carrier wave, and the DSSS receiver includes: an RF receiving unit removing an RF carrier wave from an RF signal from the RF transmitting unit and converting an analog signal obtained by removing the RF carrier wave from the RF signal into a digital signal; a differential circuit unit differentiating and converting the digital signal from the RF receiving unit into bi-orthogonal code words; and a symbol detection unit detecting a symbol corresponding to a maximum value of correlation values between bi-orthogonal code word from the differential circuit unit and a plurality of predetermined reference code words.

摘要翻译： 包括DSSS发射机和DSSS接收机的直接序列扩频（DSSS）收发机，其中DSSS发射机包括：一个整数码映射单元，用于将预定符号的2N（N是自然数）之一的N比特的源比特数据映射到N比特 以及将符号映射到通过预先积分2N个双正交码字中的每一个而获得的积分码字之一中的符号; 以及射频（RF）发送单元，其通过RF载波发送由积分码映射单元映射的积分码字，并且所述DSSS接收机包括：RF接收单元，从RF发射的RF信号中去除RF载波; 将通过从RF信号中去除RF载波而获得的模拟信号转换为数字信号; 差分电路单元，将来自RF接收单元的数字信号分解并转换成双正交码字; 以及符号检测单元，检测与来自差分电路单元的双正交码字和多个预定参考码字之间的相关值的最大值相对应的符号。