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http://dx.doi.org/10.14400/JDC.2022.20.1.185

Design of Low-Complexity FSM based on Viterbi for Optimum Bluetooth GFSK Signal Receiver  

Kwon, Taek-Won (Department of Convergence Information Technology, Konyang University)
Lee, Kyu-Man (Department of Enterprise Software, Konyang University)
Publication Information
Journal of Digital Convergence / v.20, no.1, 2022 , pp. 185-190 More about this Journal
Abstract
Bluetooth is a common wireless technology that is widely used as a connection medium between various consumer electronic devices. The Bluetooth receiver usually adopts a Viterbi algorithm to improve signal-to-noise ratio performance, but requires complex hardware and calculations for continuous search and estimation for the irrational modulation indexes at the transmission. This paper proposes a non-coherent maximum estimation based 8-State Viterbi FSM to solve these complexity problems. The proposed optimal Viterbi FSM can detect Gaussian frequency-shfit keying symbol without any prior information and estimation for the modulation indexes. The HV1/HV2 packets are used for the estimation of the proposed algorithm and the simulation results have shown performance improvements with about 2dB for 10-3 BER compared to other ideal approaches such as decision direct method.
Keywords
GFSK; MLSE(Maxium-Likelihood Seqeunce Estimation); non-coherent; Viterbi;
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