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1. (WO2018046859) STANDARDISED MEASUREMENT METHOD FOR MEASURING THE MODULATION OF AN AMPLITUDE-MODULATED RADIO SIGNAL AND METHOD FOR FILTERING THE RADIO SIGNAL

Pub. No.:    WO/2018/046859    International Application No.:    PCT/FR2017/052380
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Fri Sep 08 01:59:59 CEST 2017
IPC: H04L 27/06
H04B 1/10
G10L 25/81
Applicants: CONTINENTAL AUTOMOTIVE FRANCE
CONTINENTAL AUTOMOTIVE GMBH
Inventors: HIVERT, Grégoire
LIN, Chao
Title: STANDARDISED MEASUREMENT METHOD FOR MEASURING THE MODULATION OF AN AMPLITUDE-MODULATED RADIO SIGNAL AND METHOD FOR FILTERING THE RADIO SIGNAL
Abstract:
The invention relates to a method for filtering an amplitude-modulated radio signal (AM1), said radio signal having a bandwidth, the method comprising the steps of: converting the radio signal into a baseband signal; determining a frequency range close to the centre frequency; measuring the level of the radio signal according to frequency steps within said frequency range; determining a standardised modulation level in the radio signal, corresponding to the sum of the measurements of levels according to frequency steps, within the relevant frequency range, divided by the measurement of the level of the baseband radio signal calculated around the centre frequency; comparing the standardised noise level thus determined to a predetermined threshold, and, on the basis of said comparison, selecting a first filter (F) applied to the amplitude-modulated radio signal.