Simplified scrambling scheme for satellite broadcasting systems

Details Simplified scrambling scheme for satellite broadcasting systems Simplified scrambling scheme for satellite broadcasting systems

H - Electricity

04

L

H04L 27/36 (2006.01)

Patent

CA 2535844

A simplified scrambling scheme that unifies all signals of a satellite broadcasting system, including frame header (404), frame body (402) and pilot symbols (408) with a common reference phase. This results in the simplification and increased flexibility of the receiver front-end design without affecting the overall system performance. In many current communications systems with frame headers and pilot symbols, the phases of frame headers and pilot syrnbols are not designed to be aligned with any constellation points of the modulated data from the frame body. This scrambling scheme takes into account possible impact due to irregular phase changes between frame headers/pilot symbols and modulated data.

L'invention concerne un scénario d'embrouillage simplifié qui unifie tous les signaux de système de radiodiffusion par satellite,comprenant un en-tête de trame, un corps de trame et des symboles pilotes avec une phase de référence commune. On simplifie et on assouplit ainsi la conception de tête de réception sans affecter la performance globale d'un système. Dans de nombreux systèmes de communications existants qui comportent des en-têtes de trame et des symboles pilotes, les phases des en-têtes de trame et des symboles pilotes ne sont pas conçues pour être alignées avec des points de constellation quelconques dans les données modulées depuis le corps de trame. Ce scénario d'embrouillage tient compte des conséquences éventuelles de changements de phase irréguliers entre les en-têtes de trame/symboles pilotes et les données modulées.

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