Title :
Frequency error measurement in GMSK signals in a multipath propagation environment
Author :
Aiello, A. ; Grimaldi, D. ; Veltri, S.
Author_Institution :
Dipartimento di Elettronica, Inf. e Sistemistica, Calabria Univ., Italy
Abstract :
The paper presents an efficient method for evaluating the carrier frequency in GMSK communication systems. This method operates in a nonintrusive way. It utilizes the learning vector quantisation neural network based demodulator for reconstructing the transmitted phases. From these and the expected phases is estimated the carrier frequency error. The method is able to operate both in static and multipath propagation cases and it does not require a high frequency sampling rate because the base-band signal is processed. In order to apply the method two procedures, PSP (Procedure for Static Propagation) and PMP (Procedure for Multipath Propagation), are set-up. Tests performed on GMSK signals show that the method is quite attractive, fast and more accurate if compared with other approaches
Keywords :
demodulation; land mobile radio; minimum shift keying; multipath channels; neural chips; vector quantisation; GMSK communication systems; GMSK signals; LVQ neural network based demodulator; carrier frequency evaluation; frequency error measurement; mobile communication; multipath propagation environment; number of codebooks; phase modulation; procedure for multipath propagation; procedure for static propagation; slope classifier; transmitted phases reconstruction; Demodulation; Frequency estimation; Frequency measurement; Neural networks; Phase estimation; Portable media players; Signal processing; Signal sampling; Testing; Vector quantization;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928871
