Matched filtering and timing recovery in digital receivers

摘要

A practical look at methods for signal detection and symbol synchronization. The acquisition of a signal in a digital communi-cations system requires the convergence of several signal processing algorithms before the receiver can output meaningful data. These algorithms are adaptive in nature and need to process multiple received symbols before convergence is achieved. Because of the feedback nature inherent in these algorithms, the various adaptive receiver sections are often referred to as loops. Certain receiver loops depend on other loops. Depending on the algorithm implemented, it is possible that a given loop cannot converge until one or more previous loops have sufficiently converged. The major receiver loops are listed in the order that they typically need to converge, although the order may sometimes vary depending on the implementation.