Low earth orbit (LEO) satellites are used to provide navigation signals.
In one embodiment, a method of providing a LEO signal from a LEO
satellite includes providing a plurality of transmit channels over a
plurality of transmit slots. The transmit channels comprise a set of
communication channels and a set of navigation channels. The method also
includes generating a first pseudo random noise (PRN) ranging overlay
corresponding to a navigation signal. The method further includes
applying the first PRN ranging overlay to a first set of the navigation
channels. In addition, the method includes combining the communication
channels and the navigation channels into a LEO signal. The method also
includes broadcasting the LEO signal from the LEO satellite.