Method for reporting channel state and apparatus therefor in wireless communication system
The present invention according to one embodiment comprises the steps of: receiving linear-combination (LC) code word-based channel state reporting configuration, which is expressed by parameters comprising an LC coefficient and a phase differential (co-phase) value between antenna groups having mutually different polarization characteristics; measuring a downlink reference signal for a channel state reporting in accordance with the received channel state reporting configuration; and transmitting, to a base station, the LC code book-based channel state report corresponding to the reference signal measurement, wherein the channel state reporting can only support a broadband reporting mode.
1. A method of reporting a channel state, which is reported by a terminal in a wireless communication system, comprising:
receiving linear-combination (LC) codeword-based channel state report configuration, which is expressed by parameters containing an LC coefficient and a phase difference (co-phase) value between antenna groups having different polarization characteristics;
measuring a downlink reference signal to report a channel state according to the received channel state reporting configuration; and
transmitting the LC codeword-based channel state report to a base station according to the measurement of the reference signal,
wherein the channel state report supports a wideband reporting mode only.
2. The method of claim 1 , wherein the channel state report includes or indicates the LC coefficient and the co-phase value.
3. The method of claim 1 , wherein the channel state report includes a size parameter or a phase parameter of the LC coefficient.
4. The method of claim 1 , further comprising receiving an indication or a configuration for whether or not the channel state report is configured by a wideband report from the base station.
5. The method of claim 1 , wherein the channel state report configuration includes an aperiodic channel state information request.
6. The method of claim 5 , wherein when the channel state report is triggered by the aperiodic channel state information request, the LC coefficient, which is transmitted as the channel state report, is mapped to a physical uplink data channel region to which a channel quality indicator is mapped in a manner of being concatenated to the bit of the channel quality indicator in a bit level.
7. The method of claim 5 , wherein when the channel state report is triggered by the aperiodic channel state information request and the LC coefficient, which is transmitted as the channel state report, is configured by wideband report, the LC coefficient is mapped to a physical uplink data channel region to which a rank indicator is mapped in a manner of being concatenated to the bit of the rank indicator in a bit level.
8. A terminal configured to report a channel state in a wireless communication system, comprising:
a transmitter;
a receiver; and
a processor that controls the transmitter and the receiver, the processor receives linear-combination (LC) codeword-based channel state report configuration, which is expressed by parameters containing an LC coefficient and a phase difference (co-phase) value between antenna groups having different polarization characteristics, measures a downlink reference signal to report a channel state according to the received channel state reporting configuration, and transmits the LC codeword-based channel state report to a base station according to the measurement of the reference signal,
wherein the channel state report supports a wideband reporting mode only.
9. The terminal of claim 8 , wherein the channel state report includes or indicates the LC coefficient and the co-phase value.
10. The terminal of claim 8 , wherein the channel state report includes a size parameter or a phase parameter of the LC coefficient.
11. The terminal of claim 8 , wherein the processor receives an indication or a configuration for whether or not the channel state report is configured by a wideband report from the base station.
12. The terminal of claim 8 , wherein the channel state report configuration includes an aperiodic channel state information request.
13. The terminal of claim 12 , wherein when the channel state report is triggered by the aperiodic channel state information request, the LC coefficient, which is transmitted as the channel state report, is mapped to a physical uplink data channel region to which a channel quality indicator is mapped in a manner of being concatenated to the bit of the channel quality indicator in a bit level.
14. The terminal of claim 12 , wherein when the channel state report is triggered by the aperiodic channel state information request and the LC coefficient, which is transmitted as the channel state report, is configured by wideband report, the LC coefficient is mapped to a physical uplink data channel region to which the rank indicator is mapped in a manner of being concatenated to the bit of the rank indicator in a bit level.