Citation
Abstract
A novel Automatic Frequency Control (AFC) loop based on an Extended Kalman Filter (EKF) is introduced and analyzed in detail. The new scheme involves an EKF which operates on a modified set of data in order to track the frequency of the incoming signal, The algorithm can also be viewed as a modification to the well known crossproduct AFC loop. A low carrier-to-noise ratio (CNR), high-dynamic environment is used to test the algorithm and the probability of loss-of-lock is assessed via computer simulations. The scheme is best suited for scenarios in which the frequency error variance can be compromised to achieve a very low operating CNR threshold. This technique can easily be incorporated in the Advanced Receiver (ARX), requiring minimum software modifications.
Details
- Volume
- 42-95
- Published
- November 15, 1988
- Pages
- 219–228
- File Size
- 378.9 KB