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A fast multi-level GFSK matched filter receiver

Tibenderana, C. and Weiss, S. (2004) A fast multi-level GFSK matched filter receiver. In: 6th International Conference on Mathematics in Signal Processing, 2004-12-14 - 2004-12-16, Cirencester.

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Abstract

Near optimal reception of a multilevel Gaussian frequency shift keying symbol can be achieved using a matched filter bank (MFB) receiver, which will require M^(K+L-1) filters for M modulation levels, a K-symbol observation interval, and a Gaussian filter with an L-symbol support length. This is prohibitive for most applications for the large values of K necessary to ensure best performance. In this paper we present a recursive algorithm that eliminates redundancy in providing the matched filter outputs by use of a smaller set of 1-symbol long intermediate filters, followed by an iterative process to propagate phase gained over K successive single symbol stages. If exemplarily operated in a Bluetooth receiver, the computational cost can be reduced by two orders of magnitude. Additionally we demonstrate that the intermediate filter outputs provide a means to detect carrier frequency and modulation index offsets, which can be corrected by iteratively recomputing the coefficients of the intermediate filter bank.

Item type: Conference or Workshop Item (Paper)
ID code: 38458
Keywords: fast, multi-level, gfsk , matched, filter receiver, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Pure Administrator
Date Deposited: 13 Mar 2012 15:13
Last modified: 22 May 2015 09:12
URI: http://strathprints.strath.ac.uk/id/eprint/38458

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