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：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：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：US20090022139A1

公开(公告)日：2009-01-22

申请号：US12176129

申请日：2008-07-18

申请人： U Sang Lee ,  Koon Shik Cho

发明人： U Sang Lee ,  Koon Shik Cho

IPC分类号： H04J3/06

CPC分类号： H04L7/042 ,  H04B2001/6912 ,  H04W84/10 ,  H04W84/18 ,  H04W88/04

摘要： There are provided a wireless personal area networks (WPAN) Zigbee receiver and a receiving method thereof that can obtain a spreading gain by a reduction in data rate. A wireless personal area network Zigbee receiver receiving a signal packet including a plurality of functional units having a plurality of symbols, the plurality of functional units each repeated as many as a predetermined extension number according to an aspect of the invention includes: a preamble detection unit detecting a, and generating a preamble synchronization; and an SFD synchronization unit comparing, each symbol of SFD units included in the signal packet with a predetermined SFD reference symbol continuously and repeatedly as many as the extension number, and generating an SFD synchronization signal when each of the symbols of the SFD units is equal to the SFD reference symbol as many as the extension number.

摘要翻译： 提供了可以通过降低数据速率获得扩展增益的无线个人区域网络（WPAN）ZigBee接收机及其接收方法。 根据本发明的一个方面，一种无线个人区域网络ZigBee接收机接收包括具有多个符号的多个功能单元的信号分组，所述多个功能单元每个重复多达预定分机号码，包括：前导码检测单元 检测a并产生前同步码同步; 以及SFD同步单元，将包含在信号分组中的SFD单元的每个符号与预定的SFD参考符号连续且重复地与分机号码一样进行比较，并且当SFD单元的每个符号相等时产生SFD同步信号 到SFD参考符号与分机号码一样多。

公开(公告)号：US08094596B2

公开(公告)日：2012-01-10

申请号：US12176129

申请日：2008-07-18

申请人： U Sang Lee ,  Koon Shik Cho

发明人： U Sang Lee ,  Koon Shik Cho

IPC分类号： H04B7/00

CPC分类号： H04L7/042 ,  H04B2001/6912 ,  H04W84/10 ,  H04W84/18 ,  H04W88/04

摘要： There are provided a wireless personal area networks (WPAN) Zigbee receiver and a receiving method thereof that can obtain a spreading gain by a reduction in data rate. A wireless personal area network Zigbee receiver receiving a signal packet including a plurality of functional units having a plurality of symbols, the plurality of functional units each repeated as many as a predetermined extension number according to an aspect of the invention includes: a preamble detection unit detecting a, and generating a preamble synchronization; and an SFD synchronization unit comparing, each symbol of SFD units included in the signal packet with a predetermined SFD reference symbol continuously and repeatedly as many as the extension number, and generating an SFD synchronization signal when each of the symbols of the SFD units is equal to the SFD reference symbol as many as the extension number.

摘要翻译： 提供了可以通过降低数据速率获得扩展增益的无线个人区域网络（WPAN）ZigBee接收机及其接收方法。 根据本发明的一个方面，一种无线个人区域网络ZigBee接收机接收包括具有多个符号的多个功能单元的信号分组，所述多个功能单元每个重复多达预定分机号码，包括：前导码检测单元 检测a并产生前同步码同步; 以及SFD同步单元，将包含在信号分组中的SFD单元的每个符号与预定的SFD参考符号连续且重复地与分机号码一样进行比较，并且当SFD单元的每个符号相等时产生SFD同步信号 到SFD参考符号与分机号码一样多。

公开(公告)号：US07756195B2

公开(公告)日：2010-07-13

申请号：US11822843

申请日：2007-07-10

申请人： U Sang Lee ,  Sang Hyun Min

发明人： U Sang Lee ,  Sang Hyun Min

IPC分类号： H04B1/00

CPC分类号： H04B1/707 ,  H04W84/10

摘要： A demodulator and a demodulating method for a WPAN are provided. In the demodulator for estimating a demodulation value of a received signal by correlating a PN code sequence of PN code having a periodic relationship for each code with a sample of the received signal, an IF processor unit separates the received signal to select only an imaginary part of the received signal, and digitalizes the selected imaginary part of the received signal. A differentiator unit delays the received signal outputted from the IF processor unit by preset delay time, and multiplies the delayed received signal by a current received signal to output a plurality of differentiated received signals. A conjugate unit sequentially stores samples of the imaginary parts of the differentiated received signals, and calculates correlation values by correcting the stored samples with PN coded sequences. A timing estimator unit receives the differentiated received signals and controls an operating timing of the conjugate unit. A demodulation value estimator unit stores the correlation values outputted from the conjugate unit and estimates the symbol of the PN code sequence corresponding to a maximum correlation value as the demodulation value of the received signal.

摘要翻译： 提供了一种用于WPAN的解调器和解调方法。 在用于通过将每个代码具有周期性关系的PN码的PN码序列与接收信号的采样相关联来估计接收信号的解调值的解调器中，IF处理器单元将接收信号分离以仅选择虚部 并对所接收的信号的所选虚部进行数字化。 微分器单元将从IF处理器单元输出的接收信号延迟预设的延迟时间，并将延迟的接收信号乘以当前接收信号，以输出多个差分接收信号。 共轭单元顺序地存储差分接收信号的虚部的样本，并且通过用PN编码序列校正存储的采样来计算相关值。 定时估计器单元接收差分接收信号并控制共轭单元的操作定时。 解调值估计器单元存储从共轭单元输出的相关值，并且估计与最大相关值对应的PN码序列的符号作为接收信号的解调值。