Patent · US Expired

Dual band digital broadcast receiver

US5784418A · kind A · utility

28Cited by
4References
14Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 10, 1995
Grant dateJul 21, 1998
Priority date
Expiry dateApr 10, 2015

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04H2201/20
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

A digital broadcast transmission system comprises a plurality of spaced transmitters (6). Each transmitter (6) receives signals for transmission from a master transmitter (2), e.g. on a satellite, along with a reference frequency (F.sub.REF). The reference frequency is used to generate the transmission frequency at each spaced transmitter. At a receiver (12), conversion means can be used, to enable signals from the master transmitter (2) and from the other transmitter(s) to be received. A preferred application is digital audio broadcasting (DAB). Specifically, the present invention is useful in connection with Coded Orthogonal Frequency Division Multiplex (COFDM) modulation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.