Orthogonal frequency division multiplexing based radar

A wireless device for wireless communication, comprising:

• a memory;
• and
• one or more processors, coupled to the memory, configured to:
• transmit an orthogonal frequency division multiplexing (OFDM) signal on K subsets of N subcarriers, wherein the signal includes a sequence of modulated symbols for each subset KĄ of the K subsets, the sequence of modulated symbols is distinct for each subset Ki, and i is one of K sequences;
• receive a reflected OFDM signal that corresponds to the OFDM signal;
• process the reflected OFDM signal with K mixers, where mixer frequencies for the K mixers are separated by N subcarriers spacing, to form K portions of a range spectrum from the reflected OFDM signal;
• and
• combine the K portions to form the range spectrum.

A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

• one or more instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:
• transmit an orthogonal frequency division multiplexing (OFDM) signal on K subsets of N subcarriers, wherein the signal includes a sequence of modulated symbols for each subset Ki of the K subsets, wherein the sequence of modulated symbols is distinct for each subset Ki, and wherein i is one of K sequences;
• receive a reflected OFDM signal that corresponds to the OFDM signal;
• process the reflected OFDM signal with K mixers, where mixer frequencies for the K mixers are separated by N subcarriers spacing, to form K portions of a range spectrum from the reflected OFDM signal;
• and
• combine the K portions to form the range spectrum.

An apparatus for wireless communication, comprising:

• means for transmitting an orthogonal frequency division multiplexing (OFDM) signal on K subsets of N subcarriers, wherein the signal includes a sequence of modulated symbols for each subset K;
• of the K subsets, wherein the sequence of modulated symbols is distinct for each subset Ki, and wherein i is one of K sequences;
• means for receiving a reflected OFDM signal that corresponds to the OFDM signal;
• means for processing the reflected OFDM signal with K mixers, where mixer frequencies for the K mixers are separated by N subcarriers spacing, to form K portions of a range spectrum from the reflected OFDM signal;
• and
• means for combining the K portions to form the range spectrum.