Polar Amplification Transmitter Distortion Reduction
First Claim
1. A method of optimizing an envelope tracking transmitter, the envelope tracking transmitter including an envelope tracking amplification stage arranged to receive an input signal to be amplified and a power supply voltage tracking the envelope of the input signal to be amplified, a receiver being located with the transmitter, the method comprising:
- generating an amplified signal for transmission at the output of the amplifier;
tuning the receiver to a frequency to reject the intended transmit signal of the transmitter;
determining a characteristic of a signal detected in the receiver representing an indication of distortion in the transmitted signal; and
adjusting a setting of the transmitter in dependence on the determined characteristic.
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Accused Products
Abstract
A method of optimising a transmitter, the transmitter including a polar amplification stage including a main signal path and a magnitude signal path, a receiver being located with the transmitter, the method comprising: generating an amplified signal for transmission at the output of the amplifier; tuning the receiver to a frequency to reject the intended transmit signal of the transmitter; determining a characteristic of a signal detected in the receiver representing an indication of distortion in the transmitted signal; and adjusting a setting of the transmitter in dependence on the determined characteristic.
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Citations
20 Claims
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1. A method of optimizing an envelope tracking transmitter, the envelope tracking transmitter including an envelope tracking amplification stage arranged to receive an input signal to be amplified and a power supply voltage tracking the envelope of the input signal to be amplified, a receiver being located with the transmitter, the method comprising:
- generating an amplified signal for transmission at the output of the amplifier;
tuning the receiver to a frequency to reject the intended transmit signal of the transmitter;
determining a characteristic of a signal detected in the receiver representing an indication of distortion in the transmitted signal; and
adjusting a setting of the transmitter in dependence on the determined characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- generating an amplified signal for transmission at the output of the amplifier;
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10. An apparatus comprising an envelope tracking transmitter including an envelope tracking amplification stage arranged to receive an input signal to be amplified and a power supply voltage tracking the envelope of the input signal to be amplified, the apparatus further comprising a receiver adapted to reject the intended transmit signal of the transmitter, and including means for determining a characteristic of a signal detected in the receiver representing an indication of distortion in the transmitted signal;
- and a controller for adjusting a setting of the transmitter in dependence on the determined characteristic of the received signal.
- View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification