Implementation-Friendly and Energy-Efficient Symbol-by-Symbol Detection Scheme for IEEE 802.15.4 O-QPSK Receivers

Gaoyuan Zhang, Congyu Shi, Congzheng Han, Xingwang Li, Dan Wang, Khaled Rabie, Rupak Kharel

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In this article, the noncoherent detection scheme for the receiver in wireless sensor nodes is discussed. That is, an implementation-friendly and energy-efficient symbol-by-symbol detection scheme for IEEE 802.15.4 offset-quadrature phase shift keying (O-QPSK) receivers is investigated under both pure additive white Gaussian noise (AWGN) channel and fading channel. Specifically, the residual carrier frequency offset (CFO) of the chip sample is estimated and compensated with the aid of the preamble; then, the standard noncoherent detection scheme with perfectly known CFO is directly configured. The corre- sponding simulation results show that only 4 preamble symbols is sufficient for accurate CFO estimation. Compared with the conventional noncoherent detector, the average running time per data packet of our enhanced detector is only 0.17 times of the former; meanwhile, at the packet error rate of 1 × 10..3, our enhanced detector can obtain 2.2 dB gains in the (32, 4) direct sequence spread spectrum system. A more reasonable trade-off between complexity and reliability is thus achieved for energy-saving and maximum service life in wireless sensor networks (WSNs).

Original languageEnglish
Article number9179701
Pages (from-to)158402-185415
Number of pages14
JournalIEEE Access
Volume8
Early online date28 Aug 2020
DOIs
Publication statusPublished - 10 Sep 2020
Externally publishedYes

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