Common phase error and/or inter-carrier interference

A method comprising:

• receiving, via radio communication, one or more common phase error/inter-carrier interference (CPE/ICI) reference signals for compensation for phase noise,
• wherein the one or more CPE/ICI reference signals are in-band signals within a physical shared channel for transmission of data or control information,
• wherein the one or more CPE/ICI reference signals are mapped to orthogonal frequency division multiplexing (OFDM) symbols in the physical shared channel determined based on a modulation and coding scheme used for transmission of the data or control information for the physical shared channel,
• wherein the OFDM symbols to which the one or more CPE/ICI reference signals are mapped are different than other OFDM symbols used for demodulation reference signals for the physical shared channel, and
• wherein the one or more CPE/ICI reference signals are received following a transmission of the one or more CPE/ICI reference signals from a same one or more antenna ports as used to transmit the data or control information;
• the method further comprising:
• using the one or more CPE/ICI reference signals to compensate for phase noise.

An apparatus comprising:

• at least one processor;
• and
• at least one non-transitory memory including computer program code, wherein the memory and computer program code are configured, with the processor, to cause the apparatus to:
• depending at least on information about a modulation and coding scheme to be used for transmission of data or control information for a physical shared channel, determine orthogonal frequency division multiplexing (OFDM) symbols in the physical shared channel for transmission of one or more common phase error/inter-carrier interference (CPE/ICI) reference signals;
• map the one or more CPE/ICI reference signals to the OFDM symbols in the physical shared channel, wherein the OFDM symbols to which the one or more CPE/ICI reference signals are mapped are different than other OFDM symbols used for demodulation reference signals for the physical shared channel;
• and
• transmit, via radio communication, the one or more CPE/ICI reference signals for compensation for phase noise, wherein the one or more CPE/ICI reference signals are in-band signals within the physical shared channel for the data or control information, and wherein the one or more CPE/ICI reference signals are transmitted from a same one or more antenna ports as used to transmit the data or control information.

An apparatus comprising:

• at least one processor;
• and
• at least one non-transitory memory including computer program code, wherein the at least one non-transitory memory and computer program code are configured, with the processor, to cause the apparatus to:
• receive, via radio communication, one or more common phase error/inter-carrier interference (CPE/ICI) reference signals for compensation for phase noise,
• wherein the one or more CPE/ICI reference signals are in-band signals within a physical shared channel for transmission of data or control information,
• wherein the one or more CPE/ICI reference signals are mapped to orthogonal frequency division multiplexing (OFDM) symbols in the physical shared channel determined based on a modulation and coding scheme used for transmission of the data or control information for the physical shared channel,
• wherein the OFDM symbols to which the one or more CPE/ICI reference signals are mapped are different than other OFDM symbols used for demodulation reference signals for the physical shared channel, and
• wherein the one or more CPE/ICI reference signals are received following a transmission of the one or more CPE/ICI reference signals from a same one or more antenna ports as used to transmit the data or control information,
• wherein the at least one non-transitory memory and computer program code are further configured, with the processor, to cause the apparatus to:
• use the one or more CPE/ICI reference signals to compensate for phase noise.

A computer program product comprising a non-transitory medium storing instructions, wherein said instructions, when executed by a processor, cause at least:

• depending at least on information about a modulation and coding scheme to be used for transmission of data or control information for a physical shared channel, determining orthogonal frequency division multiplexing (OFDM) symbols in the physical shared channel for transmission of one or more common phase error/inter-carrier interference (CPE/ICI) reference signals;
• mapping the one or more CPE/ICI reference signals to the OFDM symbols in the physical shared channel, wherein the OFDM symbols to which the one or more CPE/ICI reference signals are mapped are different than other OFDM symbols used for demodulation reference signals for the physical shared channel;
• and
• transmitting, via radio communication, the one or more CPE/ICI reference signals for compensation for phase noise, wherein the one or more CPE/ICI reference signals are in-band signals within the physical shared channel for the data or control information, and wherein transmitting the one or more CPE/ICI reference signals comprises transmitting the one or more CPE/ICI reference signals from a same one or more antenna ports as used to transmit the data or control information.

A computer program product comprising a non-transitory medium storing instructions, wherein said instructions, when executed by a processor, cause at least:

• receiving, via radio communication, one or more common phase error/inter-carrier interference (CPE/ICI) reference signals for compensation for phase noise,
• wherein the one or more CPE/ICI reference signals are in-band signals within a physical shared channel for transmission of data or control information,
• wherein the one or more CPE/ICI reference signals are mapped to orthogonal frequency division multiplexing (OFDM) symbols in the physical shared channel determined based on a modulation and coding scheme used for transmission of the data or control information for the physical shared channel,
• wherein the OFDM symbols to which the one or more CPE/ICI reference signals are mapped are different than other OFDM symbols used for demodulation reference signals for the physical shared channel, and
• wherein the one or more CPE/ICI reference signals are received following a transmission of the one or more CPE/ICI reference signals from a same one or more antenna ports as used to transmit the data or control information;
• the instructions, when executed by the processor, further causing at least:
• using the one or more CPE/ICI reference signals to compensate for phase noise.