Intermodulation control device and method in mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorYoung-Geun Jang
Life of this patent
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Abstract
There is provided an intermodulation (IMD) control device and method in a mobile communication system. In the IMD control device, an LNA performs low noise amplification on an input RF signal, a first switch is connected to the LNA in parallel, for switching according to a first control signal received for IMD control, a frequency converter down-converts the output of the LNA to an IF signal, an IF amplifier amplifies the IF signal, a second switch is connected in parallel to the IF amplifier, for switching according to a second IMD control signal received for IMD control, and a controller generates the IMD control signals at voltage levels determined according to an RSSI and an energy to noise ratio.
Claims5
An intermodulation (IMD) control device in a mobile communication system, comprising:
- a low noise amplifier (LNA) for performing low noise amplification on an input RF (Radio Frequency) signal;
- a first switch connected to the LNA in parallel, for switching according to a first control signal received for IMD control;
- a frequency converter for down-converting the output of the LNA to an IF (Intermediate Frequency) signal;
- an IF amplifier for amplifying the IF signal;
- a second switch connected in parallel to the IF amplifier, for switching according to a second IMD control signal received for IMD control;
- a controller for generating the IMD control signals at voltage levels determined according to a received signal strength indicator (RSSI) and an energy to noise ratio;
- a first stabilizing circuit connected between the controller and the first switch for stabilizing the first IMD control signal;
- and
- a second stabilizing circuit connected between the controller and the second switch for stabilizing the second IMD control signal.
An IMD control method in a mobile communication system having an LNA for performing low noise amplification on an input RF signal, a frequency converter for down-converting the output of the LNA to an IF signal, and an IF amplifier for amplifying the IF signal, the method comprising the steps of:
- generating a first IMD control signal and a second IMD control signal at voltage levels determined according to an RSSI and an energy to noise ratio;
- stabilizing the first IMD control signal and the second IMD control signal;
- selectively amplifying the RF signal according to the first stabilized IMD control signal at the LNA;
- and
- selectively amplifying the IF signal according to the second stabilized IMD control signal at the IF amplifier.
Dependencies are inferred from the claim text.