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US 6,670,901 B2Granted
Dynamic range on demand receiver and method of varying same
AssigneeMotorola, Inc.
InventorsDaniel E. Brueske, Babak Bastani
Life of this patent
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Abstract
A dynamic range on demand radio frequency (RF) receiver (300) includes a wideband detector (303), off-channel detector (313) and on-channel detector (327) supplying input to an automatic gain control (307) for adjusting a dynamic control stage to control dynamic range and resolution of digital baseband signals (329, 331).
Claims19
A dynamic range on demand radio frequency (RF)receiver comprising:
- an off-channel detector for detecting interference from off-channel RF signals;
- an on-channel detector for detecting the signal strength from on-channel RF signals;
- an wideband detector for detecting the presence of wideband RF signals;
- and
- an automatic gain control (AGC) for controlling at least one dynamic control stage based on input from the off-channel detector, on-channel detector and wideband detector wherein the dynamic control state comprises at least one variable dynamic range filter for controlling dynamic range of a baseband signal and current drain of the RF receiver.
2 more elements
A radio frequency (RF) receiver for providing changes in dynamic range on demand comprising:
- a low noise amplifier for receiving RF input signals;
- a wideband detector for detecting the presence of wideband RF signals;
- an off channel detector for detecting the presence of off-channel RF interference;
- an on-channel detector for detecting the signal strength of on-channel RF signal;
- at least one dynamic control stage for receiving input from at least one mixer for varying the dynamic range and resolution of at least one baseband signal;
- and
- an automatic gain control (AGC) for controlling the at least one dynamic control stage based on input signals from the wideband detector, off-channel detector and on-channel detector wherein the at least one dynamic control stage includes at least one analog filter for varying dynamic range of a baseband signal to control current drain of the RF receiver.
4 more elements
A method for varying the dynamic range of a radio frequency (RF) receiver comprising the steps of:
- providing an RF input signal;
- detecting the presence of wideband RF signals;
- detecting the presence of off-channel interference RF signals;
- detecting the presence of on-channel interfering RF signals;
- controlling the gain of at least one dynamic control stage based on the presence of wideband RF signals, interfering off-channel RF signals and interfering on-channel RF signals;
- and
- controlling the dynamic range of a baseband signal using at least one variable dynamic range filter to control current drain of the RF receiver.
4 more elements
Dependencies are inferred from the claim text.