NDLI: A Robust Demodulator for OQPSK

Content Provider	Springer Nature Link
Author	Dai, Shengchen Qian, Hua Kang, Kai Xiang, Weidong
Copyright Year	2014
Abstract	IEEE802.15.4 standard has quickly become a benchmark in the era of Internet of things. The mandatory mode of 2.4 GHz 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 $$-$$ 1.3 dB 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.
Starting Page	231
Ending Page	247
Page Count	17
File Format	PDF
ISSN	0278081X
Journal	Circuits, Systems, and Signal Processing
Volume Number	34
Issue Number	1
e-ISSN	15315878
Language	English
Publisher	Springer US
Publisher Date	2014-07-04
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	IEEE802.15.4 OQPSK DSSS Non-coherent demodulation Frequency offset Phase mismatch Circuits and Systems Electrical Engineering Signal, Image and Speech Processing Electronics and Microelectronics, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Signal Processing

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