Multiple Symbol Differential Detection Scheme for IEEE 802.15.4 BPSK Receivers

Gaoyuan ZHANG  Hong WEN  Longye WANG  Xiaoli ZENG  Jie TANG  Runfa LIAO  Liang SONG  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E101-A   No.11   pp.1975-1979
Publication Date: 2018/11/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E101.A.1975
Type of Manuscript: LETTER
Category: Communication Theory and Signals
multiple symbol differential detection,  first-order differential modulation,  frequency offset estimation and compensation,  IEEE 802.15.4 BPSK receiver,  

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A simple and novel multiple-symbol differential detection (MSDD) scheme is proposed for IEEE 802.15.4 binary phase shift keying (BPSK) receivers. The detection is initiated by estimating and compensating the carrier frequency offset (CFO) effect in the chip sample of interest. With these new statistics, the decisions are jointly made by allowing the observation window length to be longer than two bit intervals. Simulation results demonstrate that detection reliability of the IEEE 802.15.4 BPSK receivers is significantly improved. Namely, at packet error rate (PER) of 1×10-3, the signal-to-noise ratio (SNR) gap between ideal coherent detection (perfect carrier reference phase and no CFO) with differential decoding and conventional optimal single differential coherent detection (SDCD) is filled by 2.1dB when the observation window length is set to 6bit intervals. Then, the benefit that less energy consumed by retransmissions is successfully achieved.