Patent ID: 7142159
Filing Date: 2006-11-28
Classification: G01S,H04B

Abstract:
1. A pseudolite for use in a navigation system, the pseudolite comprising: a communication (COM) satellite receiver for receiving a communication satellite specific RF signal from a communication satellite and providing communication satellite navigation and position data; a GNSS receiver for receiving a GNSS signal from a GNSS satellite and providing GNSS timing information; a pseudolite transmitter for receiving said communication satellite navigation and position data and said GNSS timing information, said pseudolite transmitter, comprising: wherein during operation of the pseudolite said communication satellite transmit RF signal is broadcast to a communication satellite, and then a communication satellite specific RF signal is broadcast from said communication satellite capable of being received by said communication satellite receiver, thus providing a closed loop control feedback to adjust the timing of said broadcasted communication satellite specific RF signal so that it is synchronized with said GNSS signal, said broadcasted communication satellite specific RF signal being utilizable by a user, said pseudolite thereby being capable of operating at relatively high power to overcome GNSS jamming effects with beyond the line-of-sight capability.