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1. 发明授权

US07792216B2 Timing estimator in OQPSK demodulator 有权
标题翻译： OQPSK解调器中的定时估计器
公开(公告)号：US07792216B2
公开(公告)日：2010-09-07
申请号：US11549025
申请日：2006-10-12
申请人： Sang Hyun Min , Hyung Jin Choi , Joo Hyun Do , Shin Woo Kang , Tah Joon Park , Koon Shik Cho
发明人： Sang Hyun Min , Hyung Jin Choi , Joo Hyun Do , Shin Woo Kang , Tah Joon Park , Koon Shik Cho
IPC分类号： H03K9/00 , H04L27/00
CPC分类号： H04L7/041 , H04L27/2278 , H04L27/2331
摘要： A timing estimator of an OQPSK demodulator is provided. In the timing estimator, an A/D converter converts an analog reception signal into a digital reception signal. A differential circuit section delays the digital reception signal from the A/D converter by a preset time and obtains a phase difference between a conjugate complex number signal of the delayed digital reception signal and the digital reception signal to offset a frequency error contained in the digital reception signal. A correlation operation section performs a correlation operation between a reference symbol differentiated in the same way as a differentiation of the differential circuit section and the reception signal to obtain each correlation value. A coherent detector detects a coherent point on the basis of the correlation value from the correlation operation section.
摘要翻译：提供OQPSK解调器的定时估计器。在定时估计器中，A / D转换器将模拟接收信号转换为数字接收信号。差分电路部分将来自A / D转换器的数字接收信号延迟预设时间，并且获得延迟的数字接收信号的共轭复数信号与数字接收信号之间的相位差，以抵消包含在数字接收信号。相关运算部分以与差分电路部分的微分和接收信号相同的方式执行区分的参考符号之间的相关运算，以获得每个相关值。相干检测器根据相关运算部分的相关值检测相干点。

2. 发明申请

US20070121765A1 Timing estimator in OQPSK demodulator 有权
标题翻译： OQPSK解调器中的定时估计器
公开(公告)号：US20070121765A1
公开(公告)日：2007-05-31
申请号：US11549025
申请日：2006-10-12
申请人： Sang Hyun Min , Hyung Jin Choi , Joo Hyun Do , Shin Woo Kang , Tah Joon PARK , Koon Shik Cho
发明人： Sang Hyun Min , Hyung Jin Choi , Joo Hyun Do , Shin Woo Kang , Tah Joon PARK , Koon Shik Cho
IPC分类号： H04L27/06 , H04L27/22
CPC分类号： H04L7/041 , H04L27/2278 , H04L27/2331
摘要： A timing estimator of an OQPSK demodulator is provided. In the timing estimator, an A/D converter converts an analog reception signal into a digital reception signal. A differential circuit section delays the digital reception signal from the A/D converter by a preset time and obtains a phase difference between a conjugate complex number signal of the delayed digital reception signal and the digital reception signal to offset a frequency error contained in the digital reception signal. A correlation operation section performs a correlation operation between a reference symbol differentiated in the same way as a differentiation of the differential circuit section and the reception signal to obtain each correlation value. A coherent detector detects a coherent point on the basis of the correlation value from the correlation operation section.
摘要翻译：提供OQPSK解调器的定时估计器。在定时估计器中，A / D转换器将模拟接收信号转换为数字接收信号。差分电路部分将来自A / D转换器的数字接收信号延迟预设时间，并且获得延迟的数字接收信号的共轭复数信号与数字接收信号之间的相位差，以抵消包含在数字接收信号。相关运算部分以与差分电路部分的微分和接收信号相同的方式执行区分的参考符号之间的相关运算，以获得每个相关值。相干检测器根据相关运算部分的相关值检测相干点。

3. 发明授权

US07558346B2 Symbol detector based on frequency offset compensation in ZigBee system and symbol detecting method thereof 有权
标题翻译：基于ZigBee系统中频偏补偿的符号检测器及其符号检测方法
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。

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