Channel selector for a radio frequency receiver
AssigneesContinental Automotive France, Continental Automotive GmbH
InventorLaurent Thery
Life of this patent
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Abstract
A channel selector for a frequency modulation radio frequency receiver, including a band-pass filter, of which the frequency band is centered on the central frequency of the channel to be selected, and has a width that is automatically variable between a minimum value and a maximum value, the minimum value being determined dynamically proportional to a weighted sum of the field level and the modulation level of the channel, according to a formula MinBW=k1×C+k2×M, in which MinBW is the minimum value, C the field level, k1 the weight associated with the field level, M the modulation level, and k2 the weight associated with the modulation level. The weight associated with the field level is less than the weight associated with the modulation level, preferably in a ratio of 1:3.
Claims20
A channel (C0) selector (1) for a frequency-modulation radiofrequency receiver, comprising a bandpass filter (2), the frequency band (BPF) of which is centered on the center frequency (F0) of the channel (C0) to be selected and has a width that is variable automatically between a minimum value (MinBP) and a maximum value (MaxBP), the minimum value (MinBP) being determined dynamically in proportion to a weighted sum of the field level (C) and the modulation level (M) of the channel (C0), in accordance with a formula MinBW=k1×C+k2×M, where MinBW is the minimum value, C is the field level, k1 is the weight associated with the field level (C), M is the modulation level, and k2 is the weight associated with the modulation level (M), wherein the weight (k1) associated with the field level (C) is lower than the weight (k2) associated with the modulation level (M).
Dependencies are inferred from the claim text.