Reduced complexity frequency estimator for burst transmission
| Autor: | Michel Bousquet, C. Bergogne, Philippe Sehier |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Burst transmission
Computer Networks and Communications Estimation theory Computer science Maximum likelihood Feed forward Aerospace Engineering Estimator Filter (signal processing) Synchronization Critical point (mathematics) Signal-to-noise ratio Control theory Frequency offset Carrier recovery Mathematics Phase-shift keying |
| Zdroj: | Proceedings of GLOBECOM '95. |
| DOI: | 10.1109/glocom.1995.502615 |
| Popis: | In burst transmission, carrier recovery is a critical point for synchronization systems. With a feedforward carrier phase recovery algorithm, a small frequency offset can significantly increase the cycle slip rate and then the phase error variance. Therefore, in order to obtain an accurate carrier phase estimation, a precise frequency correction is required. For M-states phase shift keying (M-PSK) modulated signals an unbiased feedforward reduced complexity frequency estimator (RCFE), operating in the non-data aided mode (NDA) is derived from the maximum likelihood (ML) principle. A compromise is realized between noise filtering and estimation slip probability by minimizing the estimator variance. It is optimized to operate at a low signal-to-noise ratio and short bursts. Its performance is compared to that of the ML estimator. The estimator is applied to an all-feedforward synchronization structure with QPSK modulated signals. Global performance of the modem synchronization structure is supplied. |
| Databáze: | OpenAIRE |
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