Signal transmission method for estimating phase noise in wireless communication system

A method of transmitting, by a communication device, a signal for estimating phase noise for a downlink channel in a wireless communication system, the method comprising:

• generating, a phase noise reference signal (PNRS);
• generating, a demodulation reference signal (DMRS);
• informing, to a user equipment, a transmission of the PNRS via a radio resource control (RRC) signaling;
• mapping, the PNRS to first resource elements (REs) within a group of REs that is utilized for downlink data transmission such that:
• (i) based on the PNRS and the DMRS using a same antenna port, and based on the DMRS being mapped in a frequency domain to a plurality of subcarriers within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a single subcarrier among the plurality of subcarriers within the group of REs, and
• (ii) based on the PNRS and the DMRS using the same antenna port, and based on the DMRS being mapped in a time domain to an orthogonal frequency division multiplexing (OFDM) symbol within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a plurality of OFDM symbols that occur after the OFDM symbol to which the DMRS is mapped within the group of REs, wherein each OFDM symbol in the plurality of OFDM symbols of the first REs is spaced apart by one or more OFDM symbol durations;
• and
• transmitting, to the user equipment, (i) the PNRS mapped to the first REs, and (ii) the DMRS.

A communication device configured to transmit a signal for estimating phase noise for a downlink channel in a wireless communication system, the communication device comprising:

• at least one radio frequency (RF) module;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• generating a phase noise reference signal (PNRS);
• generating a demodulation reference signal (DMRS);
• informing a transmission of the PNRS via a radio resource control (RRC) signaling;
• mapping the PNRS to first resource elements (REs) within a group of REs that is utilized for downlink data transmission such that:
• (i) based on the PNRS and the DMRS using a same antenna port, and based on the DMRS being mapped in a frequency domain to a plurality of subcarriers within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a single subcarrier among the plurality of subcarriers within the group of REs, and
• (ii) based on the PNRS and the DMRS using the same antenna port, and based on the DMRS being mapped in a time domain to an orthogonal frequency division multiplexing (OFDM) symbol within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a plurality of OFDM symbols that occur after the OFDM symbol to which the DMRS is mapped within the group of REs, wherein each OFDM symbol in the plurality of OFDM symbols of the first REs is spaced apart by one or more OFDM symbol durations;
• and
• transmitting, to a user equipment, (i) the PNRS mapped to the first REs, and (ii) the DMRS.

A method of receiving, by a user equipment (UE), a signal for estimating phase noise for a downlink channel in a wireless communication system, the method comprising:

• receiving, from a communication device in the wireless communication system, a demodulation reference signal (DMRS);
• based on a signal, received via a radio resource control (RRC) signaling, informing a transmission of the PNRS, receiving, from the communication device, a phase noise reference signal (PNRS) that is mapped to first resource elements (REs) within a group of REs that is utilized for downlink data transmission;
• and
• estimating the phase noise for the downlink channel based on the received PNRS,
• wherein based on the PNRS and the DMRS using a same antenna port, and based on the DMRS being mapped in a frequency domain to a plurality of subcarriers within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a single subcarrier among the plurality of subcarriers within the group of REs, and
• wherein based on the PNRS and the DMRS using the same antenna port, and based on the DMRS being mapped in a time domain to an orthogonal frequency division multiplexing (OFDM) symbol within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a plurality of OFDM symbols that occur after the OFDM symbol to which the DMRS is mapped within the group of REs, wherein each OFDM symbol in the plurality of OFDM symbols of the first REs is spaced apart by one or more OFDM symbol durations.

A user equipment (UE) configured to receive a signal for estimating phase noise for a downlink channel in a wireless communication system, the UE comprising:

• at least one radio frequency (RF) module;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving, from a communication device in the wireless communication system, a demodulation reference signal (DMRS);
• based on a signal, received via a radio resource control (RRC) signaling, informing a transmission of the PNRS, receiving, from the communication device, a phase noise reference signal (PNRS) that is mapped to first resource elements (REs) within a group of REs that is utilized for downlink data transmission;
• and
• estimating the phase noise for the downlink channel based on the received PNRS,
• wherein based on the PNRS and the DMRS using a same antenna port, and based on the DMRS being mapped in a frequency domain to a plurality of subcarriers within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a single subcarrier among the plurality of subcarriers within the group of REs, and
• wherein based on the PNRS and the DMRS using the same antenna port, and based on the DMRS being mapped in a time domain to an orthogonal frequency division multiplexing (OFDM) symbol within the group of REs:
• the first REs to which the PNRS is mapped are all associated with a plurality of OFDM symbols that occur after the OFDM symbol to which the DMRS is mapped within the group of REs, wherein each OFDM symbol in the plurality of OFDM symbols of the first REs is spaced apart by one or more OFDM symbol durations.