Miss Distance Calculation System and Method of Use

A method of calculating a distance between transmitters and receivers with Doppler signals for determining a miss distance between a transmitter moving along a transmitter path relative to a signal receiver using the physical phenomenon of the Doppler effect, comprising:

• broadcasting a broadcast signal with said transmitter from one among two moving vehicles and capturing and recording a portion of said broadcast signal with said signal receiver on another among said two moving vehicles,
• measuring a Received Signal Strength Indicator (“RSSI”) based on a received signal,
• measuring a change in a Doppler frequency shift in said received signal,
• removing any carrier offset and modulated data of said received signal to accurately recover the Doppler components,
• calculating a minimum distance and a time-minimum-distance between said transmitter and said signal receiver;
• wherein
• Said time-minimum-distance, also referred to as an epoch, comprises a time at which said miss distance is at said minimum distance as between said signal receiver and said transmitter, and
• the period with said transmitter and said signal receiver passing one another is referred to as an encounter.

A method of calculating a distance between transmitters and receivers with Doppler signals for determining a miss distance between a transmitter moving along a transmitter path relative to a signal receiver using the physical phenomenon of the Doppler effect, comprising:

• broadcasting a broadcast signal with said transmitter from one among two moving vehicles and capturing and recording a portion of said broadcast signal with said signal receiver on another among said two moving vehicles,
• measuring a Received Signal Strength Indicator (“RSSI”) based on a received signal,
• measuring a change in a Doppler frequency shift in said received signal,
• removing any carrier offset and modulated data of said received signal to accurately recover the Doppler components,
• calculating a minimum distance and a time-minimum-distance between said transmitter and said signal receiver;
• wherein
• Said time-minimum-distance, also referred to as an epoch, comprises a time at which said miss distance is at said minimum distance as between said signal receiver and said transmitter, and
• the period with said transmitter and said signal receiver passing one another is referred to as an encounter;
• said transmitter outputs a carrier signal of constant power including the modulation impressed upon said broadcast signal;
• wherein, said changes in the general characteristics of said received signal comprises:
• a signal strength due to the changing distance between said transmitter and said signal receiver, the path loss;
• a signal strength due to the beam pattern shapes of transmit and receive antennas;
• and
• a doppler frequency shift as said transmitter moves from approaching to departing.