发明授权
US07558346B2 Symbol detector based on frequency offset compensation in ZigBee system and symbol detecting method thereof
有权
基于ZigBee系统中频偏补偿的符号检测器及其符号检测方法
- 专利标题： Symbol detector based on frequency offset compensation in ZigBee system and symbol detecting method thereof
- 专利标题（中）： 基于ZigBee系统中频偏补偿的符号检测器及其符号检测方法
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申请号： US11427771申请日： 2006-06-29
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公开(公告)号： US07558346B2公开(公告)日： 2009-07-07
- 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
- 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
- 申请人地址： KR Suwon, Kyungki-Do
- 专利权人： Samsung Electro-Mechanics Co., Ltd.
- 当前专利权人： Samsung Electro-Mechanics Co., Ltd.
- 当前专利权人地址： KR Suwon, Kyungki-Do
- 代理机构： Lowe Hauptman Ham & Berner
- 优先权： KR10-2005-0058478 20050630
- 主分类号： H04B1/00
- IPC分类号： H04B1/00 ; H04L27/06
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.