Timing Recovery and Carrier Synchronization Using Ldpc Codes - Brossura

Valles, Esteban Luis

Brossura

ISBN 10: 3639081773 ISBN 13: 9783639081770

Casa editrice: Vdm Verlag Dr Mueller E K, 2008

Riassunto

This book provides techniques for symbol tracking and carrier acquisition in a Low-Density Parity-Check (LDPC) coded transmission. In traditional receiver architectures, acquisition and tracking are performed using phase-lock techniques that are independent of the channel-code decoding process. In burst reception scenarios, bandwidth inefficient piloting must often be embedded in a transmission in order to accelerate acquisition to aid symbol time tracking at low signal-to-noise ratios. In this book we show that outputs from an iterative decoder can be used to improve the estimation of symbol frequency and phase in either a pilotless environment or complementing available pilot information. We describe a method capable of handling very large offsets with complexity that grows linearly with the maximum offset size. Combining information from the set of parity-check equations of a LDPC code observations with a properly calibrated phase locked loop allows successful tracking in very high noise scenarios. The problem of carrier frequency estimation under these high noise conditions is also addressed.

Dettagli dell'edizione

• Editore: Vdm Verlag Dr Mueller E K
• Data di pubblicazione: 2008
• Lingua: Inglese
• ISBN 10: 3639081773
• ISBN 13: 9783639081770
• Rilegatura: Copertina flessibile
• Numero di pagine: 160
• Contatto del produttore: non disponibile
• Persona responsabile: non disponibile