Modem supporting digital pre-distortion, antenna module, and method for operating same
An antenna module may include antennas, RF chains connected to the antennas, a splitter/combiner connected to the RF chains, a mixer configured to upconvert an IF signal input to the antenna module into a transmission RF signal and output the upconverted signal to the splitter/combiner and/or to downconvert a reception RF signal which is a combination of signals from the RF chains provided from the splitter/combiner, a plurality of first couplers connected between the RF chains and the antennas, a second coupler for measuring a magnitude corresponding to a transmission RF signal before split by the splitter/combiner and/or the reception RF signal combined by the splitter/combiner, and a power detector configured to provide a plurality of magnitudes of a plurality of signals from the plurality of first couplers and a magnitude of a signal from the second coupler.
1 . An antenna module comprising:
antennas;
RF chains connected to the antennas;
a splitter/combiner connected to the RF chains;
a mixer configured to upconvert an IF signal input to the antenna module into a transmission RF signal and output the upconverted signal to the splitter/combiner and/or to downconvert a reception RF signal which is a combination of signals from the RF chains provided from the splitter/combiner;
a plurality of first couplers connected between at least the RF chains and the antennas, each of the plurality of first couplers being disposed between at least the antennas and the splitter/combiner;
a second coupler configured for measuring a magnitude corresponding to a transmission RF signal before split by the splitter/combiner and/or the reception RF signal combined by the splitter/combiner, the reception RF signal downconverted by the mixer and provided to an intermediate frequency IC connected to the antenna module, and the transmission RF signal generated at least by upconversion of the IF signal provided from the intermediate frequency IC by the mixer; and
a power detector configured to provide a plurality of magnitudes of a plurality of signals from the plurality of first couplers and a magnitude of a signal from the second coupler.
2 . The antenna module of claim 1 , wherein the second coupler is connected between at least the mixer and the splitter/combiner.
3 . The antenna module of claim 1 , wherein the second coupler is connected to an input terminal of the mixer where the IF signal is to be provided.
4 . The antenna module of claim 1 , further comprising:
at least one ADC configured to convert the plurality of magnitudes of the plurality of signals from the plurality of first couplers and the magnitude of the signal from the second coupler into a digital value; and
an interface, comprising interface circuitry, configured to provide a plurality of digital values output from the at least one ADC to a modem.
5 . The antenna module of claim 1 ,
wherein each of a plurality of magnitudes of a plurality of first signals from the plurality of first couplers is to be identified based on respective average values of the plurality of first signals, and
wherein a magnitude of a second signal from the second coupler is to be identified based on an average value of the second signal.
6 . The antenna module of claim 5 , wherein each of the plurality of magnitudes of the plurality of signals from the plurality of first couplers and the magnitude of the signal from the second coupler are to be identified based on the respective average values of the plurality of first signals and the average value of the second signal, based on a maximum and/or high value among respective signals of the RF chains provided from the splitter/combiner being less than a designated linearity threshold.
7 . The antenna module of claim 1 ,
wherein each of a plurality of magnitudes of a plurality of first signals from the plurality of first couplers is to be identified based on respective peak values of the plurality of first signals, and
wherein a magnitude of a second signal from the second coupler is to be identified based on a peak value of the second signal.
8 . The antenna module of claim 7 , wherein each of the plurality of magnitudes of the plurality of signals from the plurality of first couplers and the magnitude of the signal from the second coupler are to be identified based on the respective peak values of the plurality of first signals and the peak value of the second signal, based on a maximum and/or high value among respective signals of the RF chains provided from the splitter/combiner being the designated linearity threshold or more.