Citation
Abstract
An automatic frequency control (AFC) loop is introduced and analyzed in detail. The new scheme is a generalization of the well-known Cross-Product AFC loop that uses running overlapping discrete Fourier transforms (DFTs) to create a discriminator curve. Linear analysis is included and supported with computer simulations. The algorithm is tested in a low carrier to noise ratio (CNR) dynamic environment, and the probability of loss of lock is estimated via computer simulations. The algorithm discussed is a suboptimum tracking scheme with a larger frequency error variance compared to an optimum strategy, but offers simplicity of implementation and a very low operating threshold CNR. This technique can be applied during the carrier acquisition and re-acquisition process in the Advanced Receiver.
Details
- Volume
- 42-94
- Published
- August 15, 1988
- Pages
- 222–231
- File Size
- 371.4 KB