Patent ID: 9736790
Date: 2017-08-15
CPC Classifications: H04B,H04W

Claim:
1. A self-calibrating transceiver, comprising: a transmitter chain comprising a digital front end (DFE); a receiver chain; a base band processor comprising a test signal generator; and a calibration control state machine in electrical communication with the transmitter chain, the receiver chain, and the base band processor, the calibration control state machine being configured for enabling the receiver chain and for setting the receiver chain and the transmitter chain to corresponding frequencies; the calibration control state machine being further configured for storing one or more transmitter power and power amplifier gain mode settings; and for each setting, setting the transmitter gain and power amplifier gain mode; the transmitter chain transmitting a signal, the receiver chain receiving the transmitted signal, and the base band processor measuring a received signal strength indicator (RSSI) of the received signal; the calibration control state machine being further configured for adjusting the transmitter output power based on the measured RSSI; the calibration control state machine being further configured for calibrating the receiver based on a plurality of test tones generated by the test signal generator, wherein a phase/gain imbalance associated with each of the plurality of test tones is stored; for each of the plurality of test tones distributed within a spectrum of interest, the test signal generator being configured for generating the test tone, compensating the receiver based on the stored phase/gain imbalance associated with the test tone, and measuring a transmitter phase/gain imbalance associated with the test tone at the base band processor; and the calibration control state machine being configured for receiving the plurality of measured transmitter phase/gain imbalances from the base band processor determining a compensation value based on the transmitter phase/gain imbalance and transmitting the compensation value to the DFE.