In burst transmission rapid carrier and clock recovery is a key aspect. When a preamble is used to recover the reference parameters it is important to have a feedforward structure which allows these parameters to be estimated quickly, simultaneously and directly. The feedforward structure is generally very sensitive to frequency offsets, leading to a systematic bias and to an increase in the mean reference parameter square estimation error. In this paper the authors propose a dedicated algorithm for clock and carrier synchronization in a PSK demodulator operating in single channel per carrier (SCPC) mode, which performs efficient estimation even in the presence of a not negligible frequency offset. The algorithm is based on use of a very short special carrier preamble modulated by a known pattern and is very easy to implement with digital hardware.
In burst mode systems synchronization is a key aspect. In these systems estimators become very attractive because of their fast convergence, which allows the reference parameter acquisition time to be very short. Estimators are, however, very sensitive to frequency offsets, leading to a degradation in their performance. In this paper the authors propose a novel feedforward technique for reference parameter recovery, the main characteristics of which are simplicity, tolerance of large frequency offsets and short acquisition time.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.