Noncoherent sequence detection receiver for Bluetooth systems

TitleNoncoherent sequence detection receiver for Bluetooth systems
Publication TypeJournal Article
Year of Publication2005
AuthorsLampe, L., R. Schober, and M. Jain
JournalSelected Areas in Communications, IEEE Journal on
Pagination1718 - 1727
Date Publishedsep.
Keywordsadaptive decoding, adaptive receivers, adaptive signal detection, Bluetooth, Bluetooth system, channel phase variation, continuous phase modulation, CPM, error correction codes, filter design, filtering theory, forward error correction, forward error correction decoding, frequency shift keying, Gaussian channels, Gaussian frequency-shift keying, GFSK, interference suppression, local oscillators, modulation parameter, noncoherent sequence detection algorithm, NSD, oscillators, out-of-band interference suppression, receivers, trellis coded modulation, two-state trellis

The design of power efficient receivers for Bluetooth systems is a challenging task due to stringent complexity constraints. In this paper, we tackle this problem and present a receiver design consisting of a single filter and a subsequent noncoherent sequence detector. This receiver outperforms the conventional discriminator detector by more than 4 dB for typical Bluetooth channels. Thereby, the proposed noncoherent sequence detection (NSD) algorithm is both favorably low complex as it operates on a two-state trellis and highly robust against channel phase variations caused by low-cost local oscillators. The particular filter design accomplishes effective out-of-band interference suppression. Different from previous work on sequence detector receivers published in the literature, we take possible variations of the Bluetooth modulation parameters into account, and we also devise efficient methods for combined NSD and forward error correction decoding. Hence, the presented receiver design is an attractive solution for practical Bluetooth devices.


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