Methods and apparatus for enhancement of srs

A user equipment (UE), comprising:

• at least one processor;
• and
• a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by the at least one processor, cause the UE to perform operations including:
• receiving, from a network device, a configuration of a sounding reference signals (SRS) resource with 8 antenna ports and with a time division multiplexing (TDM) parameter, a transmission comb configuration for the SRS resource, and a cyclic shift (CS) configuration for the SRS resource, the transmission comb configuration indicating a comb value K, K being one of 2, 4, or 8, the transmission comb configuration further indicating a comb offset k, k being an integer between 0 and K−1, the CS configuration indicating CS positions, wherein the SRS resource is mapped to a number m of consecutive orthogonal frequency division multiplexing (OFDM) symbols within a same slot, m being greater than or equal to 1;
• mapping each OFDM symbol of the consecutive OFDM symbols to a corresponding subset of the 8 antenna ports based on m and s, where s is determined based on the TDM parameter and is a number of subsets of the 8 antenna ports;
• and
• transmitting, to the network device, SRSs using the 8 antenna ports based on the mapping.

A network device, comprising:

• at least one processor;
• and
• a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by the at least one processor, cause the network device to perform operations including:
• transmitting, to a user equipment (UE), a configuration of a sounding reference signals (SRS) resource with 8 antenna ports, a transmission comb configuration for the SRS resource, and a cyclic shift (CS) configuration for the SRS resource, the transmission comb configuration indicating a comb value K, K being one of 2, 4, or 8, the transmission comb configuration further indicating a configured comb offset (k), k being an integer between 0 and K−1, the CS configuration indicating CS positions,
• wherein each port of the 8 antenna ports is mapped to corresponding resource elements (REs) in the frequency domain and a corresponding CS, the corresponding REs for each port being on every K-th RE with an offset corresponding to each port based on the configured comb offset (k), the corresponding REs being within an SRS transmission bandwidth;
• and
• receiving, from the UE, SRSs corresponding to the configuration.

A network device, comprising:

• at least one processor;
• and
• a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by the at least one processor, cause the network device to perform operations including:
• transmitting, to a user equipment (UE), a configuration of a sounding reference signals (SRS) resource with 8 antenna ports and with a time division multiplexing (TDM) parameter, a transmission comb configuration for the SRS resource, and a cyclic shift (CS) configuration for the SRS resource, the transmission comb configuration indicating a comb value K, K being one of 2, 4, or 8, the transmission comb configuration further indicating a comb offset k, k being an integer between 0 and K−1, the CS configuration indicating CS positions, wherein the SRS resource is mapped to a number m of consecutive orthogonal frequency division multiplexing (OFDM) symbols within a same slot, m being greater than or equal to 1,
• wherein each OFDM symbol of the consecutive OFDM symbols is mapped to a corresponding subset of the 8 antenna ports based on m and s, where s is determined based on the TDM parameter and is a number of subsets of the 8 antenna ports;
• and
• receiving, from the UE, SRSs corresponding to the configuration.