Method for the broadcasting of digital data, notably for radio b

Details Method for the broadcasting of digital data, notably for radio b Method for the broadcasting of digital data, notably for radio b

1991-01-31

1993-07-13

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 50, 370 70, H04J 102

Patent

active

052280250

ABSTRACT:
A method for the broadcasting of digital data, in channels to which multiple paths are assigned, the characteristics of which vary in time, with time-frequency interlacing and assistance in the acquisition of the automatic frequency control. This method is one of the type providing for the distribution of the data in the form of digital elements in the frequency-time space f-t and the transmission of frames of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of the digital elements and broadcast simultaneously, the method providing for the transmission of a pattern of frequency synchronization, recurrent in time. It can be applied notably for radio broadcasting at a high bit rate towards mobile receivers, and for example, to COFDM radio broadcasting.

REFERENCES:
patent: 3435147 (1969-03-01), Malm
patent: 3855533 (1974-12-01), Schueli
patent: 4009343 (1977-02-01), Markey
patent: 4206320 (1980-06-01), Keasler et al.
patent: 4688210 (1987-08-01), Eizenhofer et al.
Alard, et al., "Principles of modulation and channel coding for digital broadcasting for mobile receivers", EBU Review-Technical, No. 224, Aug. 1987, pp. 168-189.
Alard, et al., "A New System of Sound Broadcasting to Mobile Receivers". IEEE Transactions on Telecommunications, pp. 416-420.
Pennington, "Techniques for medium-speed data transmission over HF channels", IEE Proceedings, vol. 136, Pt. I, No. 1, Feb. 1989, pp. 11-19.

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