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Volume 9
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Article

Reduced-Complexity Multiple-Symbol Detection of O-QPSK Signals in Smart Metering Utility Networks

by
Congyu Shi
1,
Gaoyuan Zhang
1,2,3,*,
Haiqiong Li
1,
Congzheng Han
2,
Jie Tang
3,
Hong Wen
3,
Longye Wang
3,4 and
Dan Wang
1
1
School of Information Engineering, Henan University of Science and Technology, Luoyang 471023, China
2
Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3
National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
4
School of Engineering and Technology, Tibet University, Lhasa 850000, China
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(12), 2049; https://doi.org/10.3390/electronics9122049
Submission received: 5 November 2020 / Revised: 23 November 2020 / Accepted: 27 November 2020 / Published: 2 December 2020
(This article belongs to the Section Microwave and Wireless Communications)
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Abstract

In this work, an implementation-friendly multiple-symbol detection (MSD) scheme is proposed for the IEEE 802.15.4g offset quadrature phase shift keying (O-QPSK) receivers over the slow fading channel. The full MSD scheme presents better detection performance than the symbol-by-symbol detection (SBSD) scheme, yet its complexity increases exponentially as the observation window length increases. We introduce a simplified MSD scheme based on two powerful strategies. We first seek the optimal and suboptimal decisions in each symbol position with the standard SBSD procedure. Then, the aforementioned optimal and suboptimal decisions instead of all candidates are jointly searched with the standard MSD procedure. That is, only the most and second most reliable candidates in each symbol position are selected to participate in the final detection. The simulation results demonstrate that the new MSD scheme can achieve more encouraging energy gain than the SBSD scheme, while the high complexity of full MSD is also effectively reduced. A more legitimate compromise between detection performance and complexity is thus accomplished, which enables smart metering utility networks (SUN) nodes to achieve energy saving and maximum service life.
Keywords: smart metering utility networks; IEEE 802.15.4g; offset QPSK; multiple-symbol detection smart metering utility networks; IEEE 802.15.4g; offset QPSK; multiple-symbol detection

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MDPI and ACS Style

Shi, C.; Zhang, G.; Li, H.; Han, C.; Tang, J.; Wen, H.; Wang, L.; Wang, D. Reduced-Complexity Multiple-Symbol Detection of O-QPSK Signals in Smart Metering Utility Networks. Electronics 2020, 9, 2049. https://doi.org/10.3390/electronics9122049

AMA Style

Shi C, Zhang G, Li H, Han C, Tang J, Wen H, Wang L, Wang D. Reduced-Complexity Multiple-Symbol Detection of O-QPSK Signals in Smart Metering Utility Networks. Electronics. 2020; 9(12):2049. https://doi.org/10.3390/electronics9122049

Chicago/Turabian Style

Shi, Congyu, Gaoyuan Zhang, Haiqiong Li, Congzheng Han, Jie Tang, Hong Wen, Longye Wang, and Dan Wang. 2020. "Reduced-Complexity Multiple-Symbol Detection of O-QPSK Signals in Smart Metering Utility Networks" Electronics 9, no. 12: 2049. https://doi.org/10.3390/electronics9122049

APA Style

Shi, C., Zhang, G., Li, H., Han, C., Tang, J., Wen, H., Wang, L., & Wang, D. (2020). Reduced-Complexity Multiple-Symbol Detection of O-QPSK Signals in Smart Metering Utility Networks. Electronics, 9(12), 2049. https://doi.org/10.3390/electronics9122049

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