公开(公告)号：US20070002937A1

公开(公告)日：2007-01-04

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： H04B1/707

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。