Patent ID: 7495607

Claim:
An adaptive receiver configured to process carrier signals received from a plurality of navigation satellites to determine receiver coordinates comprising: a co-op tracking system configured to evaluate full phases of received carrier signals; a plurality of channel indicators configured to generate status commands indicating one of a plurality of statuses, said statuses comprising a guiding status, a guided status, an open status, and a search status; a plurality of adaptive channels, each configurable in response to said status commands such that: an adaptive channel configured to operate in said guiding status comprises an autonomous wideband phase lock loop (PLL) which tracks phases of received carrier signals having a signal-to-noise ratio (SNR) above a first threshold, said channel further configured to produce control codes for target designations of varying carrier frequency, an adaptive channel configured to operate in said guided status comprises a narrow-band PLL which tracks phases of received carrier signals having a SNR above a second threshold and below said first threshold, said channel further configured to use said target designations and a prediction of frequency change caused by navigation satellite movement, an adaptive channel configured to operate in said open status comprises an open PLL in a standby mode and configured to use a prediction of frequency changes caused by satellite movement and target designations from said co-op tracking system to extrapolate full phases during satellite shading and to prepare for locking once said satellite shading is finished, and an adaptive channel configured to operate in said search status is configured to search for and lock onto carrier signals.