Comb adaptation for interlaced fdm dmrs

A method of wireless communication, comprising:

• receiving a transmission configuration from a serving base station for transmission of demodulation reference signals (DMRS) in a subframe, wherein the transmission configuration includes a combination of at least a cyclic shift, an orthogonal cover code (OCC), and a comb value;
• preparing a retransmission of the DMRS, wherein the retransmission is counted by a current transmit counter;
• selecting a transmission comb value for the retransmission, wherein the transmission comb value is selected based on a current number in the current transmit counter, and wherein the transmission comb value is different than an original comb value used in transmission of the DMRS;
• and
• transmitting the retransmission using the transmission comb value.

An apparatus configured for wireless communication, comprising:

• means for receiving a transmission configuration from a serving base station for transmission of demodulation reference signals (DMRS) in a subframe, wherein the transmission configuration includes a combination of at least a cyclic shift, an orthogonal cover code (OCC), and a comb value;
• means for preparing a retransmission of the DMRS, wherein the retransmission is counted by a current transmit counter;
• means for selecting a transmission comb value for the retransmission, wherein the transmission comb value is selected based on a current number in the current transmit counter, and wherein the transmission comb value is different than an original comb value used in transmission of the DMRS;
• and
• means for transmitting the retransmission using the transmission comb value.