Patent ID: 9344041
Filing Date: 2016-05-17
CPC Classification: H03F,H04L

Claim Text:
1. A method of envelope tracking by an envelope tracking transceiver, the envelope tracking transceiver including a 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, and a receiver being located with the transmitter and for receiving a received signal, 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; generating a sequence of adjustment values during one or more periods; generating a signal indicative of a characteristic of the received signal; multiplying the signal indicative of the characteristic of the received signal and the generated sequence of adjustment values for each of the periods; generating an adjustment signal based on the multiplication; and adjusting a setting of the transmitter in dependence on the adjustment signal.