Method and system for location of objects within a specified geographic area

A system for determining the location of objects within a geographic area, comprising:

• a plurality of portable transceiver devices each coupled to a respective object located within the geographic area and configured to transmit a plurality of signals having different transmission characteristics so as to reduce multipath interference effects;
• a plurality of stationary transceiver devices fixed at predetermined locations within the geographic area and configured to receive the plurality of signals from respective ones of the plurality of portable transceiver devices, wherein the plurality of stationary transceiver devices are each configured to determine received signal strength (RSSI) values of the plurality of signals transmitted by respective ones of the plurality of portable transceiver devices;
• and
• a base station, comprising a base station transceiver device and a computer coupled to the base station transceiver device, wherein the base station is configured to receive the RSSI values from at least one of the plurality of stationary transceiver devices and calculate a location of at least one portable transceiver device based on the received RSSI values.