Simultaneous broadcasting system, transmitter and receiver therefor
US6256508A · kind A · utility
129Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1998 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Nov 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A simultaneous broadcasting system, a transmitter, and a receiver therefor use a first frequency bandwidth for a wide area broadcasting and a second frequency bandwidth for a local area broadcasting obtained by dividing a frequency bandwidth of one broadcasting channel. In the simultaneous broadcasting system, a same program for the wide area broadcasting is transmitted based on an OFDM modulation method by using the first frequency bandwidth and a different program for each local area station is transmitted by using a different spreading code allocated for each local are station based on a SS modulation method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.