Enhanced position calculation

A method for correcting clock drift of a time base of a radio receiver via a time reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising the steps of:

• transmitting a time reference signal;
• receiving said time reference signal at first and second radio receivers;
• resetting first and second counters at said first and second receivers at predetermined intervals based on said time reference signal, each of said counters containing a value and receiving a clocking signal;
• correcting a time base at said first and second radio receivers using the received time reference signal to correct for said clock drift;
• incrementing each of said counters using the respective time base of the respective radio receiver as a clocking signal;
• receiving an unknown position radio signal at said first and second receivers;
• capturing the respective values of the counters when said unknown position radio signals are received;
• communicating the captured values to a neural network;
• using the captured values as an uncorrected timing indicator signal between the respective time reference signals and the unknown position radio signal;
• inputting the uncorrected timing indicator signal to the neural network;
• and
• outputting from the neural network an estimate of the actual location from which the unknown position radio signal was transmitted based on the captured values and the uncorrected timing indicator signal.

A method for compensating for clock drift of a time base of a radio receiver via a time reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising the steps of:

• transmitting a periodic synchronization reference signal;
• receiving said periodic synchronization reference signal at a radio receiver;
• enabling a counter when said periodic synchronization reference is received, said counter having a value and receiving a clock signal;
• clocking said counter using a local time base clock;
• receiving an unknown position radio signal;
• disabling said counter when said unknown position radio signal is received;
• capturing the value of the counter when unknown position radio signal is received;
• communicating the captured value to a neural network;
• using the captured values as an uncorrected timing indicator signal between the respective time reference signals and the unknown position radio signal;
• inputting the uncorrected timing indicator signal to the neural network;
• and
• outputting from the neural network a drift corrected timing indicator signal based on the captured values and the uncorrected timing indicator signal and based upon past training of the neural network to compensate for said clock drift.

A method for compensating for clock drift in a time base of a radio receiver via a time reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising the steps of:

• transmitting a periodic synchronization reference signal;
• receiving said periodic synchronization reference signal at a radio receiver;
• enabling a counter when said periodic synchronization reference is received, said counter having a value and receiving a clock signal;
• clocking said counter using a local time base clock;
• receiving an unknown position radio signal;
• disabling said counter when said unknown position radio signal is received;
• capturing the value of the counter when said unknown position radio signal is received;
• communicating the captured value to a neural network;
• using captured value an uncorrected timing indicator signal between the respective time reference signals and the unknown position radio signal;
• inputting the uncorrected timing indicator signal to the neural network to compensate for said clock drift;
• and
• outputting from the neural network an estimate of the actual location from which the unknown position radio signal was transmitted based on the captured value and the uncorrected timing indicator signal.

A method for compensating for clock drift of a time base of a radio receiver via a fixed reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising the steps of:

• clocking a counter using a local clock, said counter having a value and receiving said local clock signal;
• transmitting a fixed reference signal;
• receiving said fixed reference signal at a radio receiver;
• capturing the value of the counter when said fixed reference signal is received;
• using the captured value as a first uncorrected timing indicator;
• receiving an unknown position radio signal;
• capturing the value of the counter when said unknown position radio signal is received;
• using the captured value as a second uncorrected timing indicator;
• communicating the first and second uncorrected timing indicators to a neural network;
• using the captured first and second uncorrected timing indicators as inputs to said neural network to compensate for said clock drift;
• and
• outputting from the neural network a drift corrected timing indicator signal based on the first and second uncorrected timing indicator signals and based upon past training of the neural network.

A method for compensating for clock drift of a time base of a radio receiver via a fixed reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising the steps of:

• clocking a counter using a local clock, said counter having a value and receiving said local clock signal;
• transmitting a fixed reference signal;
• receiving said fixed reference signal at a radio receiver;
• capturing the value of the counter when said fixed reference signal is received;
• using the captured value as a first uncorrected timing indicator signal;
• receiving an unknown position radio signal;
• capturing the value of the counter when said unknown position radio signal is received;
• using the captured value as a second uncorrected timing indicator signal;
• communicating the first and second uncorrected timing indicator signals to a neural network;
• using the captured first and second uncorrected timing indicator signals as inputs to said neural network to compensate for said clock drift;
• and
• outputting from the neural network an estimate of the actual location from which the unknown position radio signal was transmitted based on the first and second uncorrected timing indicator signals.

A system for correcting clock drift of a time base of a radio receiver via a time reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising:

• means for transmitting a time reference signal;
• means for receiving said time reference signal at first and second radio receivers;
• means for resetting first and second counters at said first and second receivers at predetermined intervals based on said time reference signal, each of said counters containing a value and receiving a clocking signal;
• means for correcting a time base at said first and second radio receivers using the received time reference signal to correct for said clock drift;
• means for incrementing each of said counters using the respective time base of the respective radio receiver as a clocking signal;
• means for receiving an unknown position radio signal at said first and second receivers;
• means for capturing the respective values of the counters when said unknown position radio signals are received;
• means for communicating the captured values to a neural network;
• means for using the captured values as an uncorrected timing indicator signal between the respective time reference signals and the unknown position radio signal;
• means for inputting the uncorrected timing indicator signal to the neural network;
• and
• means for outputting from the neural network an estimate of the actual location from which the unknown position radio signal was transmitted based on the uncorrected timing indicator signal.

A system for correcting clock drift of a time base of a radio receiver via a time reference signal transmission, in order to determine with increased accuracy, a location from which an unknown position radio signal is transmitted, comprising:

• means for transmitting a time reference signal;
• means for receiving said time reference signal at first and second radio receivers;
• means for resetting first and second counters at said first and second receivers at predetermined intervals based on said time reference signal, each of said counters containing a value and receiving a clocking signal;
• means for correcting a time base at said first and second radio receivers using the received time reference signal to correct for said clock drift;
• means for incrementing each of said counters using the respective time base of the respective radio receiver as a clocking signal;
• means for receiving an unknown position radio signal at said first and second receivers;
• means for capturing the respective values of the counters when said unknown position radio signals are received;
• means for communicating the captured values to a neural network;
• means for using the captured values as an uncorrected timing indicator signal between the respective time reference signals and the unknown position radio signal;
• means for inputting the uncorrected timing indicator signal to the neural network;
• and
• means for outputting from the neural network a drift corrected timing indicator signal based on the uncorrected timing indicator signal and based upon past training of the neural network.