The problem of estimating the symbol timing in wideband data communication signals is considered. Conventional approaches to this problem suffer from several draw-backs, including possible lack of consistency due to multiple extrema in the error surface, and very slow convergence due to exceedingly sharp waveform correlation functions. In this work, sequential detection-estimation algorithms that alleviate these problems are constructed and analyzed. These algorithms are based on two techniques: the use of regularization (i.e., pre-filtering) to produce a consistent initial estimate at the expense of higher mean-square error, and the coupling of recursive maximum-likelihood with this consistent estimator to produce the desired goal—a recursive consistent and efficient estimator.
All Science Journal Classification (ASJC) codes
- Information Systems
- Computer Science Applications
- Library and Information Sciences
- Delay estimation
- consistent sequential estimation
- spread-spectrum communications