Devices and methods for facilitating DMRS sequence grouping

A wireless communication device, comprising:

• a transceiver;
• a memory;
• and
• a processing circuit communicatively coupled to the transceiver and the memory, the processing circuit and the memory configured to:
• obtain information for a transmission scheduled with pi/2 BPSK modulation, wherein the transmission includes two or more symbols scheduled for a demodulation reference signal (DMRS),
• determine a plurality of DMRS sequences for the transmission, the plurality of DMRS sequences comprising a respective DMRS sequence for each symbol of the two or more symbols scheduled for a DMRS, wherein each DMRS sequence subsequent to another DMRS sequence of the plurality of DMRS sequences is dependent on its immediately preceding DMRS sequence, and wherein an initial DMRS sequence of the plurality of DMRS sequences is determined independently of any other respective DMRS sequence of the plurality of DMRS sequences, and
• transmit, via the transceiver, the transmission including each respective DMRS sequence for each DMRS symbol of the two or more symbols scheduled for the DMRS.

A first wireless communication device, comprising:

• a transceiver;
• a memory;
• and
• a processing circuit communicatively coupled to the transceiver and the memory, the processing circuit and the memory configured to:
• send a first transmission via the transceiver to schedule a second transmission from a second wireless communication device with pi/2 BPSK modulation, wherein the second transmission is scheduled to include two or more symbols with a demodulation reference signal (DMRS), and
• receive the scheduled second transmission including the two or more symbols scheduled for a DMRS, wherein at least one symbol of the two or more DMRS symbols includes a DMRS sequence based on its immediately preceding DMRS sequence, and wherein a first DMRS symbol of the two or more DMRS symbols includes a DMRS sequence that is determined independently of any other DMRS sequence of the two or more symbols.