In this article, we present an advanced coherent receiver for the IEEE 802.15.4 offset quadrature phase-shift keying (OQPSK) physical layer and provide an open-source implementation in the GNU Radio framework. Simulation and field test results show that the proposed receiver achieves about 11-dB power gain over an existing GNU Radio receiver, which treats OQPSK as minimum-shift-keying (MSK) for low-complexity processing. While suitable modules can be added to the MSK-based receiver for performance enhancement, the proposed receiver still maintains a 6-dB power gain. The proposed coherent receiver is attractive for IoT applications where a powerful software-defined-radio (SDR)-based gateway is deployed to interact with various sensors.
Bibliographical noteFunding Information:
Manuscript received October 11, 2020; revised January 12, 2021; accepted January 27, 2021. Date of publication February 5, 2021; date of current version May 21, 2021. The work of Zelin Yun and Song Han was supported in part by the National Science Foundation (NSF) under Award CNS-1925706 and Award IIP-1919229. (Evan Faulkner and Zelin Yun contributed equally to this work.) (Corresponding author: Shengli Zhou.) Evan Faulkner and Shengli Zhou are with the Department of Electrical and Computer Engineering, University of Connecticut, Storrs, CT 06250 USA (e-mail: firstname.lastname@example.org; email@example.com).
© 2014 IEEE.
- IEEE 802.15.4
- offset quadrature phase-shift keying (OQPSK)
- software-defined radio (SDR)