Wireless apparatus
A wireless apparatus including: an amplification circuit configured to generate a second signal by amplifying power of a first signal, a calculation circuit configured to calculate a deviation amount of phase deviation of the second signal from the first signal, and a correction circuit configured to correct the phase deviation using a correction method that is selected from a plurality of correction methods based on the deviation amount, the plurality of correction methods among which each power consumption is higher as each correction amount corresponding to each power consumption is greater.
1. A wireless apparatus comprising:
an amplification circuit configured to generate a second signal by amplifying power of a first signal;
a calculation circuit configured to calculate a deviation amount of phase deviation of the second signal from the first signal; and
a correction circuit configured to:
correct the phase deviation using a first correction method that possesses a first correction amount and first power consumption when an absolute value of the deviation amount is equal to or higher than a first threshold value; and
correct the phase deviation using a second correction method that possesses a second correction amount greater than the first correction amount and second power consumption higher than the first power consumption when the absolute value of the deviation amount calculated after correcting the phase deviation using the first correction method is equal to or higher than the first threshold value.
2. The wireless apparatus according to claim 1 , wherein
the plurality of correction methods are respectively associated with a plurality of value ranges of the absolute value of the deviation amount, and
the correction circuit is configure to correct the phase deviation using a specified correction method corresponding to a specified value range within which the absolute value of the deviation amount falls from among the plurality of value ranges.
3. The wireless apparatus according to claim 1 , further comprising:
a distortion compensation circuit configured to compensate for distortion occurring in the second signal based on the first signal and the second signal, wherein
the first threshold value is determined based on a distortion compensation capacity of the distortion compensation circuit.
4. The wireless apparatus according to claim 1 , wherein
the correction circuit is configured to correct the phase deviation when a power of the second signal is equal to or higher than a second threshold value, but not to correct the phase deviation when the power of the second signal is lower than the second threshold value.
5. The wireless apparatus according to claim 1 , wherein
the amplification circuit includes a plurality of amplifiers coupled in series, and
the correction circuit is configured to correct the phase deviation only for a last amplifier of the plurality of amplifiers.
6. The wireless apparatus according to claim 1 , wherein
the amplification circuit is a Doherty type that includes a carrier amplifier and a peak amplifier, and
the correction circuit is configured to correct the phase deviation for both of the carrier amplifier and the peak amplifier.
7. The wireless apparatus according to claim 1 , wherein
the amplification circuit is a Doherty type that includes a carrier amplifier and a peak amplifier, and
the correction circuit is configured to correct the phase deviation for the carrier amplifier but not to correct the phase deviation for the peak amplifier.