REDUCED COMPLEXITY FREQUENCY ESTIMATOR FOR BURST TRANSMISSION

✍ Scribed by BERGOGNE, CHRISTIAN ;SEHIER, PHILIPPE ;BOUSQUET, MICHEL

• Book ID: 102659223
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 780 KB
• Volume: 14
• Category: Article
• ISSN: 0737-2884
• DOI: 10.1002/(sici)1099-1247(199611)14:6<455::aid-sat561>3.0.co;2-r

✦ Synopsis

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. 0