Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Efficient and robust detection of GFSK signals under dispersive channel, modulation index, and carrier frequency offset conditions

Tibenderana, Charles and Weiss, Stephan (2005) Efficient and robust detection of GFSK signals under dispersive channel, modulation index, and carrier frequency offset conditions. EURASIP Journal on Advances in Signal Processing, 2005 (16). pp. 2719-2729. ISSN 1110-8657

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Gaussian frequency shift keying is the modulation scheme specified for Bluetooth. Signal adversities typical in Bluetooth networks include AWGN, multipath propagation, carrier frequency, and modulation index offsets. In our effort to realise a robust but efficient Bluetooth receiver, we adopt a high-performance matched-filter-based detector, which is near optimal in AWGN, but requires a prohibitively costly filter bank for processing of K bits worth of the received signal. However, through filtering over a single bit period and performing phase propagation of intermediate results over successive single-bit stages, we eliminate redundancy involved in providing the matched filter outputs and reduce its complexity by up to 90% (for K = 9). The constant modulus signal characteristic and the potential for carrier frequency offsets make the constant modulus algorithm (CMA) suitable for channel equalisation, and we demonstrate its effectiveness in this paper. We also introduce a stochastic gradient-based algorithm for carrier frequency offset correction, and show that the relative rotation between successive intermediate filter outputs enables us to detect and correct offsets in modulation index.

Item type: Article
ID code: 7138
Keywords: Gaussian frequency, shift keying, bluetooth, carrier frequency constant modulus algorithm, signal processing, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 10 Nov 2008
    Last modified: 15 Aug 2012 15:53
    URI: http://strathprints.strath.ac.uk/id/eprint/7138

    Actions (login required)

    View Item