Coverage enhancement with frequency selective transmission

A wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• receive a downlink control information indicating:
• a transmission via uplink resources comprising sub-bands;
• and
• a sounding reference signal resource indicator (SRI);
• select, based on the SRI, one or more sounding reference signal (SRS) resources;
• determine uplink precoders for the transmission, wherein the uplink precoders comprise an uplink precoder determined, for each respective sub-band of the sub-bands, based on a transmission precoder of the one or more SRS resources transmitted via the respective sub-band;
• and
• transmit, based on the determined uplink precoders, a transport block of the transmission via the uplink resources.

A system comprising:

• a base station;
• and
• a wireless device comprising:
• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• receive, from the base station, a downlink control information indicating:
• a transmission via uplink resources comprising sub-bands;
• and
• a sounding reference signal resource indicator (SRI);
• select, based on the SRI, one or more sounding reference signal (SRS) resources;
• determine uplink precoders for the transmission, wherein the uplink precoders comprise an uplink precoder determined, for each respective sub-band of the sub-bands, based on a transmission precoder of the one or more SRS resources transmitted via the respective sub-band;
• and
• transmit, to the base station and based on the determined uplink precoders, a transport block of the transmission via the uplink resources.