| Fast and precise frequency estimation of single-tone digitized signals are often crucial for applications in communication, radar, sonar and electronic warfare. The real-time performance of a single-tone frequency estimation algorithm depends not only on its computational efficiency, but also on its ability to yield accurate estimates from short signal segments at all frequencies up to Nyquist rate. A not-so-well-known algorithm developed by S. Crozier is quite powerful in this respect. It remains accurate at all frequencies, has a low SNR threshold, and its complexity is linearly proportional to the number of signal samples, which is well suited for both hardware and software implementations.; The motivations for an implementation of a frequency estimator such as Crozier are based on the importance of that functionality for many applications. Thus, the architectures build for the implementations must offer not only a good processing efficiency but should also be reusable to simplify the integration of the estimator in different applications. (Abstract shortened by UMI.)... |
