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US 10,312,876 B2Granted
Method and apparatus for adaptive transmit power control
AssigneeEntropic Communications, Inc.
InventorBranislav Petrovic
Life of this patent
Estimating the term…
Abstract
Systems and methods for dynamically adjusting transmit gain in a transceiver. The gain is adjusted in order to provide the maximum gain. The amount of distortion is measured. The gain is increased until the distortion reaches a predetermined limit. The gain of several components can be adjusted independently.
Claims20
A transceiver comprising:
- a variable gain power amplifier (PA), the PA configured to receive a signal to be transmitted, and provide gain to the signal to be transmitted;
- a circuit comprising:
- a first resistor having a first and second terminal, the first terminal of the first resistor coupled to an output of the PA;
- a switch having a first and second terminal, the second terminal of the first resistor coupled to the first terminal of the switch;
- and
- a second resistor having a first and second terminal, the first terminal of the second resistor coupled to the second terminal of the switch and the second terminal of the second resistor coupled to an input to a low noise amplifier (LNA);
- and
- a processor that is:
- coupled to the PA and to an output of the circuit;
- and
- configured to:
- provide the signal to be transmitted to the PA;
- and
- configure a gain level of the PA based on a measured distortion of the signal to be transmitted.
11 more elements
A method for adjusting the gain of a transmitter, the method comprising:
- amplifying a transmit signal with an adjustable gain power amplifier (PA);
- communicating a loopback signal, based on said amplified transmit signal, to an input of a low noise amplifier (LNA) using a first resistor coupled to an output of said PA and to a second resistor, said second resistor coupled to said input of said LNA and said first and second resistors coupled by a switch for said communicating said loopback signal;
- and
- measuring the amount of distortion in said loop-back signal and configuring a gain of the PA based on the measured distortion.
1 more element
A transceiver comprising:
- a variable gain power amplifier (PA), the PA configured to receive a signal to be transmitted, and provide gain to the signal to be transmitted;
- a loopback circuit comprising a switch and first and second resistors, each having a first terminal and a second terminal, the first terminal of the first resistor coupled to an output of the PA, the second terminal of the first resistor coupled to the first terminal of the switch, the first terminal of the second resistor coupled to the second terminal of the switch, and the second terminal of the second resistor coupled to a low noise amplifier;
- and
- a processor that is:
- coupled to the PA and to an output of the loopback circuit;
- and
- configured to:
- provide the signal to be transmitted to the PA;
- and
- configure a gain level of the PA based on a measured distortion of the signal to be transmitted.
7 more elements
Dependencies are inferred from the claim text.