Apparatus and method for correcting deviation between plurality of transmission channels
The present disclosure relates to apparatus for correcting a deviation between a plurality of transmission channels, which includes a first transmission channel and a second transmission channel. The first transmission channel and the second transmission channel are respectively connected to a first endpoint and a second endpoint of a correction coupling channel. One example apparatus includes a receiver and at least one processor. The receiver is configured to when a first signal is fed at the first endpoint and a second signal is fed at the second endpoint, respectively detect a plurality of signal vectors based on a plurality of feedback signals of the first transmission channel and the second transmission channel. The at least one processor is configured to determine a deviation correction value between the first transmission channel and the second transmission channel based on the detected signal vectors.
1. An apparatus for correcting a deviation between a plurality of transmission channels, wherein the plurality of transmission channels comprise a first transmission channel, a second transmission channel, and a correction coupling channel, wherein a first endpoint of the correction coupling channel is connected to the first transmission channel, wherein a second endpoint of the correction coupling channel is connected to the second transmission channel, and wherein the apparatus comprises:
a receiver, the receiver configured to:
when a first signal is fed at the first endpoint, detect a first signal vector based on a first feedback signal of the first transmission channel, and detect a second signal vector based on a second feedback signal of the second transmission channel; and
when a second signal is fed at the second endpoint, detect a third signal vector based on a third feedback signal of the first transmission channel, and detect a fourth signal vector based on a fourth feedback signal of the second transmission channel, wherein the second feedback signal and the third feedback signal are propagated in opposite directions on the correction coupling channel; and
at least one processor, the at least one processor configured to determine a deviation correction value between the first transmission channel and the second transmission channel based on the detected signal vectors, wherein the deviation correction value is used to correct a deviation between the first transmission channel and the second transmission channel.
2. The apparatus according to claim 1 , wherein the second feedback signal is a signal obtained after the first signal is propagated through the correction coupling channel from the first endpoint to the second endpoint and the second transmission channel, and wherein the third feedback signal is a signal obtained after the second signal is propagated through the first transmission channel and the correction coupling channel from the second endpoint to the first endpoint.
3. The apparatus according to claim 1 , wherein the receiver comprises a quadrature receiver, wherein the first transmission channel and the second transmission channel are combined by using a combiner, and wherein the quadrature receiver is connected to the combiner by using a coupler;
wherein, when the first signal is fed at the first endpoint, the quadrature receiver separately performs frequency mixing processing on the first signal and the first feedback signal and on the first signal and the second feedback signal to obtain the first signal vector and the second signal vector; and
wherein, when the second signal is fed at the second endpoint, the quadrature receiver separately performs frequency mixing processing on the second signal and the third feedback signal and on the second signal and the fourth feedback signal to obtain the third signal vector and the fourth signal vector.
4. The apparatus according to claim 3 , wherein the apparatus further comprises a splitter, wherein the splitter is connected to the quadrature receiver, wherein the splitter is further connected to the first endpoint and the second endpoint of the correction coupling channel by using a switch, and wherein:
when the splitter is connected to the first endpoint by using the switch, the splitter is configured to split the first signal to the quadrature receiver and the first endpoint, and when the splitter is connected to the second endpoint by using the switch, the splitter is configured to split the second signal to the quadrature receiver and the second endpoint.
5. The apparatus according to claim 4 , wherein the switch is a three-port switch or a three-port balun.
6. The apparatus according to claim 4 , wherein the apparatus is an apparatus into which a radio frequency signal is input, wherein the first signal and the second signal are radio frequency signals, and wherein:
the first signal and the second signal are radio frequency signals from outside the apparatus; or
the apparatus further comprises a signal generator connected to the splitter, wherein the signal generator is configured to generate radio frequency signals, and wherein the radio frequency signals comprise the first signal and the second signal.
7. The apparatus according to claim 4 , wherein the apparatus is an apparatus into which an intermediate frequency signal is input, wherein the apparatus further comprises a frequency mixer connected to the splitter, wherein the frequency mixer is configured to perform frequency mixing processing on the intermediate frequency signal and correction signals to obtain the first signal and the second signal, and wherein:
the correction signals are from outside the apparatus; or
the apparatus further comprises a signal generator, wherein the signal generator is configured to generate the correction signals.
8. The apparatus according to claim 4 , wherein the apparatus is an apparatus into which a baseband signal is input, and wherein:
the first signal and the second signal are from outside the apparatus; or
the apparatus further comprises a signal generator connected to the splitter, wherein the signal generator is configured to generate the first signal and the second signal.
9. The apparatus according to claim 1 , wherein the plurality of transmission channels further comprise a third transmission channel, wherein the third transmission channel is connected to a third endpoint of the correction coupling channel, and wherein the apparatus is further configured to at least one of:
correct a deviation between the first transmission channel and the third transmission channel; or
correct a deviation between the second transmission channel and the third transmission channel.
10. The apparatus according to claim 1 , wherein the apparatus and the plurality of transmission channels are integrated into a same semiconductor chip.
11. A wireless communications device, comprising:
an apparatus and a plurality of transmission channels, wherein the plurality of transmission channels comprise a first transmission channel, a second transmission channel, and a correction coupling channel, wherein a first endpoint of the correction coupling channel is connected to the first transmission channel, wherein a second endpoint of the correction coupling channel is connected to the second transmission channel, and wherein the apparatus comprises:
a receiver, the receiver configured to:
when a first signal is fed at the first endpoint, detect a first signal vector based on a first feedback signal of the first transmission channel, and detect a second signal vector based on a second feedback signal of the second transmission channel; and
when a second signal is fed at the second endpoint, detect a third signal vector based on a third feedback signal of the first transmission channel, and detect a fourth signal vector based on a fourth feedback signal of the second transmission channel, wherein the second feedback signal and the third feedback signal are propagated in opposite directions on the correction coupling channel; and
at least one processor, the at least one processor configured to determine a deviation correction value between the first transmission channel and the second transmission channel based on the detected signal vectors, wherein the deviation correction value is used to correct a deviation between the first transmission channel and the second transmission channel.
12. A method for correcting a deviation between a plurality of transmission channels, wherein the plurality of transmission channels comprise a first transmission channel, a second transmission channel, and a correction coupling channel, wherein a first endpoint of the correction coupling channel is connected to the first transmission channel, wherein a second endpoint of the correction coupling channel is connected to the second transmission channel, and wherein the method comprises:
when a first signal is fed at the first endpoint, detecting a first signal vector based on a first feedback signal of the first transmission channel, and detecting a second signal vector based on a second feedback signal of the second transmission channel;
when a second signal is fed at the second endpoint, detecting a third signal vector based on a third feedback signal of the first transmission channel, and detecting a fourth signal vector based on a fourth feedback signal of the second transmission channel, wherein the second feedback signal and the third feedback signal are propagated in opposite directions on the correction coupling channel; and
determining a deviation correction value between the first transmission channel and the second transmission channel based on the detected signal vectors, wherein the deviation correction value is used to correct a deviation between the first transmission channel and the second transmission channel.
13. The method according to claim 12 , wherein the second feedback signal is a signal obtained after the first signal is propagated through the correction coupling channel from the first endpoint to the second endpoint and the second transmission channel, and wherein the third feedback signal is a signal obtained after the second signal is propagated through the first transmission channel and the correction coupling channel from the second endpoint to the first endpoint.
14. The method according to claim 12 , wherein:
the detecting a first signal vector and detecting a second signal vector comprises separately performing frequency mixing processing on the first signal and the first feedback signal and on the first signal and the second feedback signal to obtain the first signal vector and the second signal vector; and
the detecting a third signal vector and detecting a fourth signal vector comprises separately performing frequency mixing processing on the second signal and the third feedback signal and on the second signal and the fourth feedback signal to obtain the third signal vector and the fourth signal vector.
15. The method according to claim 12 , wherein the plurality of transmission channels further comprise a third transmission channel, wherein the third transmission channel is connected to a third endpoint of the correction coupling channel, and wherein the method further comprises at least one of:
correcting a deviation between the first transmission channel and the third transmission channel; or
correcting a deviation between the second transmission channel and the third transmission channel.