Electronic device for gesture recognition with improved data processing

A method for radar sensing, the method comprising:

• adopting a first state and a second state in an alternating manner using a finite state machine;
• transmitting a first plurality of chirps via a transmission antenna port in the first state;
• transmitting a second plurality of chirps subsequent to the first plurality of chirps via the transmission antenna port in the second state;
• receiving an analog signal from a reception transmission port, the analog signal comprising a reflected portion of the first plurality of chirps and the second plurality of chirps;
• down converting the analog signal to an intermediate frequency analog signal;
• converting the intermediate frequency analog signal to an intermediate frequency digital signal;
• in the first state, storing intermediate frequency digital signal data of the intermediate frequency digital signal in a first buffer memory, and outputting digital intermediate signal data stored in a second buffer memory from the second buffer memory;
• and
• in the second state, storing the intermediate frequency digital signal data of the intermediate frequency digital signal in the second buffer memory, and outputting the digital intermediate frequency signal data stored in the first buffer memory from the first buffer memory;
• and
• the first and second buffer memories supplying a signal to the finite state machine indicating that storing the digital intermediate frequency signal data has been completed, wherein each one of the first buffer memory and the second buffer memory comprises an output connected to an input of the finite state machine.

A product, comprising

• a radar sensing device, comprising
• a transmission antenna port;
• a reception antenna port;
• a mixer connected to the reception antenna port, the mixer being configured to down convert an analog received signal to an analog intermediate frequency signal, the analog received signal originating from a moving object;
• an analog-to-digital converter connected to the mixer, the analog-to-digital converter configured to convert the analog intermediate frequency signal to digital intermediate frequency signal data;
• first and second buffer memories connected to the analog-to-digital converter;
• a finite state machine configured to adopt first and second states in an alternating manner;
• a first switch comprising a first input, a first output, and a second output, wherein
• the first input is connected to an output of the analog-to-digital converter, the first output is connected to an input of the first buffer memory, and the second output is connected to an input of the second buffer memory, and
• the first switch is configured to transmit the digital intermediate frequency signal data received from the analog-to-digital converter to the first and second buffer memories in the alternating manner;
• and
• a second switch comprising a first input, a second input, and an output, wherein
• the first input is connected to an output of the first buffer memory, and the second input is connected to an output of the second buffer memory,
• the second switch is configured to transmit digital intermediate frequency signal data received from the first and second buffer memories to the output in the alternating manner, and
• the second switch comprises a third input connected to an output of the finite state machine, wherein:
• when the radar sensing device transmits a first plurality of chirps from the transmission antenna port in the first state, the first buffer memory is configured to store the digital intermediate frequency signal data received from the analog-to-digital converter in the first state, and the second buffer memory is configured to output digital intermediate frequency data stored in the second buffer memory, and
• when the radar sensing device transmits a second plurality of chirps from the transmission antenna port subsequent to the first plurality of chirps in the second state, the second buffer memory is configured to store the digital intermediate frequency signal data received from the analog-to-digital converter, and the first buffer memory is configured to output the digital intermediate frequency signal data stored in the first buffer memory.

A radar device, comprising:

• a transmission antenna port;
• a reception antenna port;
• a mixer connected to the reception antenna port, the mixer being configured to down convert an analog received signal to an analog intermediate frequency signal, the analog received signal received from a moving object;
• an analog-to-digital converter connected to the mixer, the analog-to-digital converter configured to convert the analog intermediate frequency signal to a digital intermediate frequency signal data;
• first and second buffer memories connected to the analog-to-digital converter, wherein:
• the radar device is configured to adopt a first state and a second state in an alternating manner,
• in the first state, the radar device is configured to transmit a first plurality of chirps via the transmission antenna port,
• in the second state, the radar device is configured to transmit a second plurality of chirps via the transmission antenna port subsequent to the first plurality of chirps,
• in the first state the first buffer memory is configured to store the digital intermediate frequency signal data received from the analog-to-digital converter, and the second buffer memory is configured to output digital intermediate signal data stored in the second buffer memory, and
• in the second state the second buffer memory is configured to store the digital intermediate frequency signal data received from the analog-to-digital converter, and the first buffer memory is configured to output the digital intermediate frequency signal data stored in the first buffer memory;
• a finite state machine configured to adopt the first and second states in the alternating manner;
• a first switch comprising a first input, a first output, and a second output, wherein
• the first input is connected to an output of the analog-to-digital converter, the first output is connected to an input of the first buffer memory, and the second output is connected to an input of the second buffer memory, and
• the first switch is configured to transmit the digital intermediate frequency signal data received from the analog-to-digital converter to the first and second buffer memories in the alternating manner;
• and
• a second switch comprising a first input, a second input, and an output, wherein
• the first input is connected to an output of the first buffer memory, and the second input is connected to an output of the second buffer memory,
• the second switch is configured to transmit digital intermediate frequency signal data received from the first and second buffer memories to the output in the alternating manner, and
• the second switch comprises a third input connected to an output of the finite state machine.