Radar implementation in a communication device

A method of operating a communication device that comprises a modem and a transceiver, wherein the modem comprises digital baseband circuitry for generating a digital baseband signal for transmission, and the transceiver is configured to receive the digital baseband signal from the modem and to generate therefrom a radiofrequency signal for transmission by the communication device, the method comprising:

• controlling the modem to operate in a first mode;
• and
• controlling the modem to operate in a second mode,
• wherein:
• the first mode is a radar mode in which the modem generates radar baseband signals for transmission as one or more radar radiofrequency signals by the transceiver;
• and
• the second mode is a communication mode in which the modem generates information-containing baseband signals for transmission by the transceiver;
• wherein the method comprises:
• when operating in the first mode, generating a radar baseband sequence and generating the radar baseband signal from the radar baseband sequence by supplying the radar baseband sequence to an Orthogonal Frequency Division Multiplexing (OFDM) modulator, wherein the radar baseband sequence is configured to cause the transceiver to generate the one or more radar radiofrequency signals as one or more OFDM pulses;
• and
• when operating in the second mode, supplying data representing information to the OFDM modulator, wherein the data representing information causes the transceiver to generate the radiofrequency signal as information-containing OFDM symbols.

A non-transitory computer readable storage medium comprising instructions that, when executed by at least one processor, causes the at least one processor to carry out a method of operating a communication device that comprises a modem and a transceiver, wherein the modem comprises digital baseband circuitry for generating a digital baseband signal for transmission, and the transceiver is configured to receive the digital baseband signal from the modem and to generate therefrom a radiofrequency signal for transmission by the communication device, the method comprising:

• controlling the modem to operate in a first mode;
• and
• controlling the modem to operate in a second mode,
• wherein:
• the first mode is a radar mode in which the modem generates radar baseband signals for transmission as one or more radar radiofrequency signals by the transceiver;
• and
• the second mode is a communication mode in which the modem generates information-containing baseband signals for transmission by the transceiver;
• and
• wherein the method comprises:
• when operating in the first mode, generating a radar baseband sequence and generating the radar baseband signal from the radar baseband sequence by supplying the radar baseband sequence to an Orthogonal Frequency Division Multiplexing (OFDM) modulator, wherein the radar baseband sequence is configured to cause the transceiver to generate the one or more radar radiofrequency signals as one or more OFDM pulses;
• and
• when operating in the second mode, supplying data representing information to the OFDM modulator, wherein the data representing information causes the transceiver to generate the radiofrequency signal as information-containing OFDM symbols.