Modulating reference signals for conveying feedback information

A method for wireless communication at a network entity, comprising:

• transmitting, to a user equipment (UE), control signaling indicating to the UE to convey feedback information by modulating an uplink reference signal;
• transmitting, to the UE, a set of downlink messages comprising a first set of code blocks and a second set of code blocks;
• and
• receiving, from the UE and in response to receiving the set of downlink messages, a set of uplink reference signals comprising a first uplink reference signal and a second uplink reference signal, wherein the set of uplink reference signals are modulated by the UE to convey the feedback information for the set of downlink messages according to a set of cyclic shifts, and wherein a first cyclic shift applied to a sequence indicates a first combination of feedback information for the first set of code blocks and a second cyclic shift applied to the sequence indicates a second combination of feedback information for the second set of code blocks.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a network entity, control signaling indicating to the UE to convey feedback information by modulating an uplink reference signal;
• receive, from the network entity, a set of downlink messages comprising a first set of code blocks and a second set of code blocks;
• modulate, in accordance with a set of cyclic shifts, a set of uplink reference signals comprising a first uplink reference signal and a second uplink reference signal, wherein applying a first cyclic shift to a sequence indicates a first combination of feedback information for the first set of code blocks and applying a second cyclic shift to the sequence indicates a second combination of feedback information for the second set of code blocks;
• and
• transmit, to the network entity, the set of uplink reference signals in response to receiving the set of downlink messages, wherein the set of uplink reference signals are modulated by the UE to convey the feedback information for the set of downlink messages according to the set of cyclic shifts.

An apparatus for wireless communication at a network entity, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE), control signaling indicating to the UE to convey feedback information by modulating an uplink reference signal;
• transmit, to the UE, a set of downlink messages comprising a first set of code blocks and a second set of code blocks;
• and
• receive, from the UE and in response to receiving the set of downlink messages, a set of uplink reference signals comprising a first uplink reference signal and a second uplink reference signal, wherein the set of uplink reference signals are modulated by the UE to convey the feedback information for the set of downlink messages according to a set of cyclic shifts, and wherein a first cyclic shift applied to a sequence indicates a first combination of feedback information for the first set of code blocks and a second cyclic shift applied to the sequence indicates a second combination of feedback information for the second set of code blocks.