Patent ID: 7280072
Filing Date: 2007-10-09
Classification: G01S

Abstract:
1. A radio navigation system comprising: a. a transmitting station comprising: (i.) an array of antennas that transmit a series of radio pulses comprising unmodulated radio signals with different radiation patterns, each pulse's radiation pattern being determined by its sequence in a predetermined set of radiation patterns for each radio pulse transmitted, where each radio pulse is transmitted at a known time interval from the start of the series of radio pulses that are transmitted; and b. a local station comprising: (i.) a local receiver for receiving the radio navigation pulses transmitted from the transmitting station, and for generating a signal strength indication signal for each pulse in the series of pulses received; (ii.) a stored program processor for receiving the signal strength indication signal for each radio pulse received at each time interval for calculating the bearing of the local station from the central station.