Comparison of processing techniques for remote sensing of earth-exploiting reflected radio-navigation signals

The use of signals transmitted by global navigation satellite systems (GNSS) as a tool for earth remote sensing has been attracting growing interest in recent years, in particular for spaceborne missions. For such techniques, several on-board processing strategies have been proposed, either based on on-board signal generation or based on `blind` interferometric processing. Presented is a comprehensive comparison of these two categories of GNSS-R processing techniques by introducing a generalised decomposition of the cross-correlation waveform.