Lowe Hauptman Ham & Berner
Symbol detector based on frequency offset compensation in ZigBee system and symbol detecting method thereof
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.
Samsung Electro-Mechanics Co., Ltd.
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Kwang Mook Sang Hyun Jung Su Tah Joon Koon Shik Hyung Jin Joo Hyun U Sang
Lee Min Han Park Cho Choi Do Lee