Method and electronic device for transmitting precoded PUCCH signal in wireless communication system
Provided is an operation method of an electronic device including a plurality of antennas, the operation method including obtaining precoding information from a base station, generating a physical uplink control channel (PUCCH) precoding vector based on the precoding information, generating a precoded PUCCH signal by multiplying a PUCCH signal by the PUCCH precoding vector, and transmitting the precoded PUCCH signal to the base station by using the plurality of antennas.
1 . An operation method of an electronic device comprising a plurality of antennas, the operation method comprising:
obtaining precoding information from a base station;
generating a physical uplink control channel (PUCCH) precoding vector based on the precoding information;
generating a precoded PUCCH signal by multiplying a PUCCH signal by the PUCCH precoding vector; and
transmitting the precoded PUCCH signal to the base station by using the plurality of antennas,
wherein the generating the PUCCH precoding vector comprises:
obtaining the PUCCH precoding vector from a precoding matrix set, while a transmission mode of the electronic device is a first transmission mode that is based on a codebook; and
obtaining the PUCCH precoding vector based on a channel state information-reference signal (CSI-RS) received from the base station, while the transmission mode of the electronic device is a second transmission mode that is not based on a codebook.
2 . The operation method of claim 1 , wherein the obtaining of the precoding information comprises transmitting a sounding reference signal (SRS) to the base station, and
wherein the precoding information comprises information about the precoding matrix set.
3 . The operation method of claim 2 , wherein the information about the precoding matrix set comprises a transmission precoding matrix index (TPMI) corresponding to an index of the precoding matrix set.
4 . The operation method of claim 3 , wherein a precoding matrix of the precoding matrix set corresponds to the index, and
wherein the generating of the PUCCH precoding vector comprises generating the precoding matrix as the PUCCH precoding vector based on a rank of the precoding matrix being 1.
5 . The operation method of claim 3 , wherein a precoding matrix of the precoding matrix set corresponds to the index, and
wherein the generating of the PUCCH precoding vector comprises generating a first column of the precoding matrix as the PUCCH precoding vector based on a rank of the precoding matrix exceeding 1.
6 . The operation method of claim 1 , wherein the generating of the PUCCH precoding vector while the transmission mode of the electronic device is the second transmission mode comprises:
calculating a correlation coefficient matrix of a receiving channel;
calculating eigenvalues of the correlation coefficient matrix;
calculating eigenvectors of the correlation coefficient matrix; and
generating one of the eigenvectors as the PUCCH precoding vector.
7 . The operation method of claim 6 , wherein the generating the one of the eigenvectors as the PUCCH precoding vector comprises:
identifying a largest eigenvalue from among the eigenvalues; and
generating an eigenvector corresponding to the largest eigenvalue as the PUCCH precoding vector.
8 . An electronic device comprising:
a communication circuit comprising a plurality of antennas and configured to transmit a precoded physical uplink control channel (PUCCH) signal to a base station and receive precoding information; and
a control circuit configured to generate a PUCCH precoding vector based on the precoding information, generate the precoded PUCCH signal by multiplying a PUCCH signal by the PUCCH precoding vector, and control the communication circuit to transmit the precoded PUCCH signal to the base station by using the plurality of antennas,
wherein the control circuit is further configured to:
obtain the PUCCH precoding vector from a precoding matrix set, while a transmission mode of the electronic device is a first transmission mode that is based on a codebook; and
obtain the PUCCH precoding vector based on a channel state information-reference signal (CSI-RS) received from the base station, while the transmission mode of the electronic device is a second transmission mode that is not based on a codebook.
9 . The electronic device of claim 8 , further comprising a memory configured to store the precoding matrix set,
wherein the control circuit is further configured to control the communication circuit to transmit a sounding reference signal (SRS) to the base station, and to receive the precoding information comprising information about the precoding matrix set from the base station.
10 . The electronic device of claim 9 , wherein the precoding information comprises a transmission precoding matrix index (TPMI) corresponding to an index of the precoding matrix set.
11 . The electronic device of claim 10 , wherein a precoding matrix of the precoding matrix set corresponds to the index, and
wherein the control circuit is further configured to generate the precoding matrix as the PUCCH precoding vector based on a rank of the precoding matrix being 1.
12 . The electronic device of claim 10 , wherein a precoding matrix of the precoding matrix set corresponds to the index, and
wherein the control circuit is further configured to generate a first column of the precoding matrix as the PUCCH precoding vector based on a rank of the precoding matrix exceeding 1.
13 . The electronic device of claim 8 , wherein the control circuit is further configured to, while the transmission mode of the electronic device is the second transmission mode, calculate a correlation coefficient matrix of a receiving channel, calculate eigenvalues of the correlation coefficient matrix, calculate eigenvectors of the correlation coefficient matrix, and generate one of the eigenvectors as the PUCCH precoding vector.
14 . The electronic device of claim 13 , wherein the control circuit is further configured to identify a largest eigenvalue from among the eigenvalues, and generate an eigenvector corresponding to the largest eigenvalue as the PUCCH precoding vector.
15 . A wireless communication system comprising:
a base station configured to control an uplink based on a precoded physical uplink control channel (PUCCH) signal; and
an electronic device comprising:
a plurality of antennas;
a communication circuit configured to transmit the precoded PUCCH signal and receive a precoding information; and
a control circuit configured to generate a PUCCH precoding vector based on the precoding information, generate the precoded PUCCH signal by multiplying a PUCCH signal by the PUCCH precoding vector, and control the communication circuit to transmit the precoded PUCCH signal to the base station by using the plurality of antennas,
wherein the control circuit is further configured to:
obtain the PUCCH precoding vector from a precoding matrix set, while a transmission mode of the electronic device is a first transmission mode that is based on a codebook; and
obtain the PUCCH precoding vector based on a channel state information-reference signal (CSI-RS) received from the base station, while the transmission mode of the electronic device is a second transmission mode that is not based on a codebook.
16 . The wireless communication system of claim 15 , further comprising a memory configured to store the precoding matrix set which is common to the base station,
wherein the control circuit is further configured to control the communication circuit to transmit a sounding reference signal (SRS) to the base station, and to receive the precoding information comprising information about the precoding matrix set from the base station.
17 . The wireless communication system of claim 16 , wherein the precoding information comprises a transmission precoding matrix index (TPMI) corresponding to an index of the precoding matrix set.