Sidelink multi-port transmission

A first wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
• receive, from a second wireless device and via a physical sidelink control channel (PSCCH), sidelink control information comprising:
• a number of demodulation reference signal (DMRS) antenna ports;
• and
• resource assignment of a physical shared channel (PSSCH) received in one or more first resources;
• measure a first reference signal power (RSRP) of the PSSCH;
• measure a channel busy ratio (CBR);
• determine a second RSRP of the PSSCH based on the measurement of the first RSRP of the PSSCH and at least one of:
• the number of DMRS antenna ports;
• or
• the measurement of the CBR;
• select one or more second resources based on the second RSRP;
• and
• transmit, via the one or more second resources selected and that are for transmission within a set of candidate resources, one or more transport blocks via the one or more second resources.

A system comprising:

• a second wireless device;
• and
• a first wireless device comprising:
• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
• receive, from the second wireless device and via a physical sidelink control channel (PSCCH), sidelink control information comprising:
• a number of demodulation reference signal (DMRS) antenna ports;
• and
• resource assignment of a physical shared channel (PSSCH) received in one or more first resources;
• measure a first reference signal power (RSRP) of the PSSCH;
• measure a channel busy ratio (CBR);
• determine a second RSRP of the PSSCH based on the measurement of the first RSRP of the PSSCH and at least one of:
• the number of DMRS antenna ports;
• or
• the measurement of the CBR;
• select one or more second resources based on the second RSRP;
• and
• transmit, via the one or more second resources selected and that are for transmission within a set of candidate resources, one or more transport blocks via the one or more second resources.