Low-complexity amplitude error correction in a wireless communication circuit

A wireless device comprising a transceiver circuit comprising:

• a frequency equalization circuit configured to apply a frequency equalization filter to an input vector to linearize a gain error of the input vector in each of a plurality of modulation frequencies to thereby generate a frequency-equalized input vector;
• and
• a gain error correction circuit configured to:
• apply a complex filter to the frequency-equalized input vector to superimpose a respective linearized gain error in a selected modulation frequency among the plurality of modulation frequencies onto a respective linearized gain error in a reference modulation frequency among the plurality of modulation frequencies;
• determine a linearized gain error correction term in the selected modulation frequency based on the respective linearized gain error in the reference modulation frequency;
• and
• apply the determined linearized gain error correction term to the frequency-equalized input vector to thereby generate an equalized input vector in the selected modulation frequency.

A method for correcting an amplitude error in a wireless device comprising:

• applying a frequency equalization filter to an input vector to linearize a gain error of the input vector in each of a plurality of modulation frequencies to thereby generate a frequency-equalized input vector;
• applying a complex filter to the frequency-equalized input vector to superimpose a respective linearized gain error in a selected modulation frequency among the plurality of modulation frequencies onto a respective linearized gain error in a reference modulation frequency among the plurality of modulation frequencies;
• determining a linearized gain error correction term in the selected modulation frequency based on the respective linearized gain error in the reference modulation frequency;
• and
• applying the determined linearized gain error correction term to the frequency-equalized input vector to thereby generate an equalized input vector in the selected modulation frequency.