20150185023 | TURN-BY-TURN NAVIGATION SYSTEM AND METHOD USING FEEDFORWARD LOCATION ESTIMATION - A turn-by-turn internal navigation system for use with a mobile electronic device includes three receives for using a trilateration navigational algorithm using first receiver for receiving a cellular tower radio frequency (RF) signal, a second receiver for receiving a WiFi RF signal; and a third receiver for receiving at least one Bluetooth RF signal based upon a BLE tag network. A processor works to execute an algorithm using feed-forward estimation such that no feedback is needed for distance error correction. The algorithm uses dead reckoning navigation in combination with information from the first receiver, second receiver and third receiver to generate positional information such that in-building navigation instructions are displayed on the mobile electronic device. | 07-02-2015 |