Pulse transponder countermeasure

A method of jamming a speed and/or distance detection signal, comprising:

• receiving from a speed measurement device a detection signal directed at a vehicle;
• measuring said vehicle's speed;
• using said measured speed to calculate a response time for sending a jamming signal to said speed measuring device so as to change the speed and/or distance perceived by said speed measurement device;
• and
• sending a signal toward said speed measurement device at said calculated time.

A method of jamming a speed and/or distance detection signal, comprising:

• receiving from a speed measurement device a detection signal directed at a vehicle, said detection signal having a signature and a reflected signal pattern;
• analyzing said signature to identify said speed measurement device in a database comprising speed measurement devices signatures;
• calculating a jamming signal;
• measuring said vehicle's speed;
• using said measured speed to calculate a response time for sending said jamming signal;
• and
• transmitting said jamming signal to said speed measurement device at said calculated time.

A pulse transponder measuring device, comprising:

• a central processing unit (CPU);
• an optical transmitter connected with said CPU, said optical transmitter adapted to transmit detection signals to a measured vehicle;
• and
• an optical receiver connected with said CPU, said optical receiver adapted to receive reflected signals from said measured vehicle;
• said transmitter configured to control at least one of said transmitted signal's dimensions.

A pulse transponder measuring device, comprising:

• a central processing unit (CPU);
• an optical transmitter connected with said CPU, said optical transmitter adapted to transmit detection signals to a measured vehicle;
• and
• an optical receiver connected with said CPU, said optical receiver adapted to receive reflected signals from said measured vehicle;
• said CPU configured to detect at least one of said reflected signal's pulse repetition period (PRP), amplitude, width and shape.