In-building tracking system for distributed antenna systems

1. A system for determining a position of a first responder in a building, where the first responder is using a radio, the system comprising:

a plurality of antennas distributed geographically within the building, each of the plurality of antennas having a fixed location within the building, a level detector to detect and measure a strength of an input signal from the radio of the first responder to produce a level signal, a time tagger and a communication module to transmit data;

a signal distribution network configured to distribute a common timing signal to each of the plurality of antennas and to communicate the data transmitted by each of the communication modules, wherein the data comprises the level signal and timing information generated by the time tagger and the common timing signal; and

a sensor processor configured to receive the data from each of the plurality of antennas via the signal distribution network and to determine the position of the radio relative to each of the plurality of antennas according to the data.

2. The system in accordance with claim 1 , wherein the timing signal is common between all of the plurality of antennas.

3. The system in accordance with claim 1 , wherein the sensor processor is further configured to detect a presence of a predetermined SOS signal in the input signal.

4. The system in accordance with claim 3 , wherein the sensor processor is further configured to generate an alert if the predetermined SOS signal in the input signal is present.

5. The system in accordance with claim 1 , wherein the sensor processor is further configured to time-align detected signal levels of two or more of the plurality of antennas to determine the position of the radio.

6. A method of determining a position of a first responder in a building, where the first responder is using a radio, the building having a distributed antenna system, the method comprising:

detecting, by one or more antennas of a plurality of antennas of the distributed antenna system, an input signal from the radio, wherein each antenna has a fixed position within the building;

measuring, by a level detector associated with each of the one or more antennas, a strength of the input signal from the radio of the first responder to produce a level signal;

communicating, by a signal distribution network, a timing signal to each antenna of the plurality of antennas;

tagging, by a time tagger associated with each of the one or more antennas, the detected input signal with the timing signal;

transmitting, by a communication module associated with each of the one or more antennas, the level signal and the timing signal to the signal distribution network of the distributed antenna system; and

determining, by a sensor processor associated with the distributed antenna system, the position of the radio relative to each of the plurality of antennas according to the level signal and the timing signal.

7. The method in accordance with claim 6 , wherein the timing signal is common between all of the plurality of antennas.

8. The method in accordance with claim 6 , further comprising detecting, by the sensor processor, a presence of a predetermined SOS signal in the input signal.

9. The method in accordance with claim 8 , further comprising generating, by the sensor processor, an alert if the predetermined SOS signal in the input signal is present.

10. The method in accordance with claim 6 , time aligning, by the sensor processor, detected signal levels of two or more of the plurality of antennas to determine the position of the radio.