Superposition coding based preamble designs for co-existing radio access technologies

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• generate a preamble signal comprising a first set of symbols and a second set of symbols, wherein the first set of symbols correspond to a preamble sequence associated with a first radio access technology (RAT) mapped to a first set of subcarriers associated with pilot symbols for the preamble sequence, and the second set of symbols correspond to a signature associated with a second RAT mapped to a second set of subcarriers, the second set of subcarriers comprising one or more subcarrier frequencies in between respective subcarriers of the first set of subcarriers, and wherein the first set of symbols is identifiable to both the first RAT and the second RAT and the second set of symbols is identifiable to the second RAT;
• and
• transmit the preamble signal over a frequency channel shared by the first RAT and the second RAT.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive a preamble signal transmitted over a shared frequency channel, the preamble signal having a predetermined preamble time duration associated with a first radio access technology (RAT), the preamble signal having a first set of symbols corresponding to a preamble sequence associated with the first RAT mapped to a first set of subcarriers associated with pilot symbols for the preamble sequence, and a second set of symbols corresponding to a signature associated with the second RAT mapped to a second set of subcarriers, the second set of subcarriers comprising one or more subcarrier frequencies in between respective subcarriers of the first set of subcarriers;
• and
• determine that a transmitter device associated with the received preamble signal is associated with the second RAT based at least in part on the signature in the received preamble signal.