Broadcasting method numerical data, primarily for broadcasting high flow towards mobile receivers with time-frequency interlacing and analog synchronization.

摘要

FIELD invention is NUMERIC data dissemination for reception ESPECIALLY FOR MOBILE circulating in an urban environment, THAT IS, IN THE PRESENCE OF PARASITES AND INTERFERENCE AND CONDITIONS OF multipropagation (Rayleigh process). The objective is to an embodiment optimized frame structure SIGNAL DISSEMINATED, so that the full benefit PROPERTIES AUTOTUNE PROCEDURE COFDM, AND MAXIMIZE THE STRENGTH OF PARASITES SYSTEM IMPULSE AND THE INTERFERENCE. According to the invention, Reclaiming timing of each received frame is performed by elements ANALOGICOS TIMING WITHOUT PRIOR EXTRACTION CLOCK. Preferably HEAD frame (21) comprises a first symbol VACUUM (24) TIMING AND A SECOND SYMBOL unmodulated (25) forming a synchronization system TWO STAGES ANALOGICO. THE CONSTITUTION OF USEFUL symbol sequence (23) in the frame is obtained OPERATIONS OF TEMPORARY AND SEQUENTIAL INTERLACING, COMBINED FOR A interleaving IMPLICIT obtner the receiver. THE SYMBOL VACUUM (24) CAN SERVE IN ADDITION TO THE EXTRACTION OF INTERFERENCE AFFECTING transmission channel.