MODULATION QUALITY MEASUREMENTS IN BLUETOOTHTM SYSTEMS THROUGH TIME-FREQUENCY REPRESENTATIONS

Leopoldo Angrisani, Massimo D’Apuzzo, Mauro D’Arco

Abstract

A digital-signal-processing method for assessing bluetooth transmitters modulation quality is presented and validated. Thanks to the use of the Short Time Fourier Transform (STFT), a typical time-frequency representation (TFR), the instantaneous frequency trace of the bluetooth signal is first attained; the most significant parameters peculiar to modulation quality are then measured through straightforward procedures. The influence on measurement results of different choices of the STFT parameters is exhaustively analysed. The optimal tuning of the parameters, capable of granting the lowest experimental standard deviations, is finally found.

Keywords

Time Frequency Representation, binary-GFSK modulation, frequency deviation measurement, frequency drift measurement, initial carrier frequency tolerance measurement

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PWC-2003-TC4-003.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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