Changing the phase tracking reference signal (PTRS) pattern over different symbols

A method of wireless communications by a first wireless node, comprising:

• identifying different patterns of phase tracking reference signal (PTRS) tones for transmitting a PTRS;
• determining when to change at least one of the different patterns of the PTRS tones from one symbol of a slot to another symbol of the slot;
• and
• transmitting the PTRS, to a second wireless node, according to the determination.

An apparatus for wireless communication by a first wireless node, comprising:

• a memory;
• and
• one or more processors coupled to the memory, the one or more processors, individually or collectively, are configured to:
• identify different patterns of phase tracking reference signal (PTRS) tones for receiving a PTRS;
• determine when to change at least one of the different patterns of the PTRS tones from one symbol of a slot to another of the slot;
• and
• monitor for the PTRS, from a second wireless node, according to the determination.

An apparatus for wireless communication by a first wireless node, comprising:

• a memory;
• and
• one or more processors coupled to the memory, wherein the one or more processors, individually or collectively, are configured to:
• identify different patterns of phase tracking reference signal (PTRS) tones for transmitting a PTRS;
• determine when to change at least one of the different patterns of the PTRS tones from one symbol of a slot to another symbol of the slot;
• and
• transmit the PTRS, to a second wireless node, according to the determination.