caa a22 4500 606204768 CHVBK 20210128101004.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00034-014-9844-z doi (NATIONALLICENCE)springer-10.1007/s00034-014-9844-z A Robust Demodulator for OQPSK-DSSS System [Elektronische Daten] [Shengchen Dai, Hua Qian, Kai Kang, Weidong Xiang] IEEE802.15.4 standard has quickly become a benchmark in the era of Internet of things. The mandatory mode of 2.4GHz physical layer of IEEE802.15.4 standard employs offset quadrature phase shift keying (OQPSK) modulation with direct sequence spread spectrum (DSSS). The performance of conventional differential demodulator is not satisfactory. The coherent demodulator is vulnerable to initial phase mismatch or frequency offset. In this paper, we propose a new non-coherent demodulator for the OQPSK-DSSS system. The proposed demodulator is robust against initial phase mismatch and frequency offset. At $$-$$ - 1.3dB SNR in additive white Gaussian noise channel, the proposed demodulator achieves the target sensitivity at 1% packet error rate. Simulation results demonstrate the effectiveness and robustness of the proposed demodulator. Springer Science+Business Media New York, 2014 IEEE802.15.4 nationallicence OQPSK nationallicence DSSS nationallicence Non-coherent demodulation nationallicence Frequency offset nationallicence Phase mismatch nationallicence Dai Shengchen Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 200050, Shanghai, China aut Qian Hua Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 200050, Shanghai, China aut Kang Kai Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 200050, Shanghai, China aut Xiang Weidong Electrical and Computer Engineering Department, University of Michigan, Dearborn, 48128, Dearborn, MI, USA aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/1(2015-01-01), 231-247 0278-081X 34:1<231 2015 34 34 https://doi.org/10.1007/s00034-014-9844-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9844-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dai Shengchen Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 200050, Shanghai, China aut NATIONALLICENCE 700 1- Qian Hua Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 200050, Shanghai, China aut NATIONALLICENCE 700 1- Kang Kai Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 200050, Shanghai, China aut NATIONALLICENCE 700 1- Xiang Weidong Electrical and Computer Engineering Department, University of Michigan, Dearborn, 48128, Dearborn, MI, USA aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/1(2015-01-01), 231-247 0278-081X 34:1<231 2015 34 34