Channel sounding method using single-tone signal with at least one security marker embedded therein and associated wireless communication device

A wireless communication device of performing channel sounding for distance estimation based on phase-based ranging, comprising:

• a signal generator circuit, configured to generate a first single-tone signal with at least one security marker embedded therein for a first tone duration;
• and
• a transmitter circuit, configured to transmit the first single-tone signal from the wireless communication device to another wireless communication device during the first tone duration.