Adaptive Multiple Frequency Shift Keying (MFSK) Waveform Design for Multi-Target ISAC Applications

A method for a wireless device for receiving a joint sensing and communication (JSC) signal, comprising:

• receiving the JSC signal, which is based on a first signal comprising a first waveform and a second signal comprising a second waveform,
• wherein the JSC signal comprises steps, each step of the JSC signal comprises one step out of discrete steps of the first signal comprising the first waveform and one step out of discrete steps of the second signal comprising the second waveform,
• the first waveform comprises two or more discrete steps of a chirp in a first frequency range, wherein each discrete step of the first waveform has a constant frequency,
• the second waveform comprises two or more discrete steps of a chirp in a second frequency range, wherein each discrete step of the second waveform has a constant frequency, and
• in the JSC signal, a discrete step out of the first signal or a discrete step out of the second signal is associated with at least one bit;
• and
• obtaining a bit sequence based on the discrete steps of the first signal and/or the discrete steps of the second signal.

A wireless device for transmitting a joint sensing and communication (JSC) signal, comprising:

• processing circuitry configured to:
• obtain a first waveform for a first signal, wherein the first waveform comprises two or more discrete steps of a chirp in a first frequency range, wherein each discrete step of the first waveform has a constant frequency,
• obtain a second waveform for a second signal, wherein the second waveform comprises two or more discrete steps of a chirp in a second frequency range, wherein each discrete step of the second waveform has a constant frequency, and
• transmit the JSC signal, which is based on the first signal comprising the first waveform and the second signal comprising the second waveform,
• wherein the JSC signal comprises steps, wherein each step of the JSC signal comprises one step out of the discrete steps of the first signal comprising the first waveform and one step out of the discrete steps of the second signal comprising the second waveform, and
• wherein in the JSC signal, a discrete step out of the first signal or a discrete step out of the second signal is associated with at least one bit.

A wireless device for transmitting a joint sensing and communication (JSC) signal, comprising:

• processing circuitry configured to:
• receive the JSC signal, which is based on a first signal comprising a first waveform and a second signal comprising a second waveform,
• wherein the JSC signal comprises steps, each step of the JSC signal comprises one step out of discrete steps of the first signal comprising the first waveform and one step out of discrete steps of the second signal comprising the second waveform,
• the first waveform comprises two or more discrete steps of a chirp in a first frequency range, wherein each discrete step of the first waveform has a constant frequency,
• the second waveform comprises two or more discrete steps of a chirp in a second frequency range, wherein each discrete step of the second waveform has a constant frequency, and
• in the JSC signal, a discrete step out of the first signal or a discrete step out of the second signal is associated with at least one bit;
• and
• obtain a bit sequence based on the discrete steps of the first signal and/or the discrete steps of the second signal.