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US 12,567,879 B2Granted
Variable bandpass filter in ultra-wideband radio
AssigneeInfineon Technologies AG
InventorDaniel Lee
Life of this patent
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Abstract
An ultra-wideband (UWB) radio includes a first bandpass filter, a first analog-to-digital converter (ADC), a baseband processor, and a first control circuit. The first bandpass filter is configured to filter a radio frequency (RF) signal according a first lower cutoff frequency and a first upper cutoff frequency, thereby forming a first filtered signal. The first ADC is configured to convert the first filtered signal to a first digital signal. The baseband processor is configured to process the first digital signal. The first control circuit is configured to control the first lower cutoff frequency and the first upper cutoff frequency.
Claims17
An ultra-wideband (UWB) radio comprising:
- a first bandpass filter configured to filter a radio frequency (RF) signal according to a first lower cutoff frequency and a first upper cutoff frequency, thereby forming a first filtered signal;
- a first analog-to-digital converter (ADC) configured to convert the first filtered signal to a first digital signal;
- a baseband processor configured to process the first digital signal;
- and
- a first control circuit configured to control the first lower cutoff frequency and the first upper cutoff frequency,
- wherein the first control circuit is configured to set the first lower cutoff frequency to a first frequency and set the first upper cutoff frequency to a second frequency, greater than the first frequency, wherein a difference between the second frequency and the first frequency is less than 500 MHz,
- wherein the baseband processor is configured to determine whether a non-UWB signal is present in the RF signal between the first frequency and the second frequency in response to the first control circuit setting the first lower cutoff frequency to the first frequency and setting the first upper cutoff frequency to the second frequency.
4 more elements
A method comprising:
- setting a lower cutoff frequency of a first bandpass filter of an ultra-wideband (UWB) radio to a first frequency and setting an upper cutoff frequency of the first bandpass filter to a second frequency greater than the first frequency;
- receiving a radio frequency (RF) signal with the UWB radio;
- performing a first filtering of the RF signal with the first bandpass filter while the lower cutoff frequency is set to the first frequency and the upper cutoff frequency is set to the second frequency;
- determining whether a non-UWB signal is present in the RF signal between the first frequency and the second frequency in response to performing the first filtering;
- setting the lower cutoff frequency of the first bandpass filter to a third frequency, greater than the first frequency, and setting the upper cutoff frequency of the first bandpass filter to a fourth frequency greater than the second frequency and the third frequency;
- performing a second filtering of the RF signal with the first bandpass filter while the lower cutoff frequency is set to the third frequency and the upper cutoff frequency is set to the fourth frequency;
- and
- determining whether a non-UWB signal is present in the RF signal between the third frequency and the fourth frequency in response to performing the second filtering.
5 more elements
An ultra-wideband (UWB) radio comprising:
- a bandpass filter;
- a control circuit configured to set a passband of the bandpass filter to a first frequency band and to subsequently set the passband to a second frequency band different than the first frequency band, wherein the bandpass filter is configured to filter a radio frequency (RF) signal according to the passband, thereby forming a first filtered signal in response to the passband being set to the first frequency band and forming a second filtered signal in response to the passband being set to the second frequency band;
- an analog-to-digital converter (ADC) configured to convert the first filtered signal to a first digital signal and convert the second filtered signal to a second digital signal;
- and
- a baseband processor configured to determine whether a non-UWB signal is present in the RF signal within the first frequency band based on the first digital signal and determine whether a non-UWB signal is present in the RF signal within the second frequency band based on the second digital signal.
2 more elements
Dependencies are inferred from the claim text.