A distance zero-value self-correction method based on a radio frequency agile transceiver chip

Abstract

The application provides a distance zero value self-calibration method based on a radio frequency agile transceiver chip, comprising the following steps: configuring the radio frequency agile transceiver chip as a double-channel mode; selecting a manual gain control mode for a receiving channel gain control mode of the radio frequency agile transceiver chip, and manually setting gain values of a working branch receiving channel and a self-calibration branch receiving channel to be the same; connecting a Tx2 radio frequency output signal of the self-calibration branch transmitting channel to a radio frequency receiving end of a Rx2 receiving channel after the Tx2 radio frequency output signal is subjected to frequency conversion and fixed attenuation processing; adopting a Tone-FM single tone frequency modulation for a transmitting end signal of the self-calibration branch; performing single tone frequency signal demodulation at a receiving end of the self-calibration branch, recovering a single tone signal from the received signal through frequency discrimination technology, and performing phase comparison on the recovered single tone signal and an original single tone signal output by the transmitting end of the self-calibration branch to obtain a distance zero value of the self-calibration branch; and compensating a Tx1 radio frequency output signal of a transmitting channel of a working branch and a Rx1 radio frequency signal of a receiving channel according to the distance zero value obtained by the self-calibration branch.

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