Gap filler apparatus and method for providing cyclic delay diversity in a digital multimedia broadcasting system, and broadcasting relay network using the same
US7813330B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2005 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jun 2, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2607
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A gap filler apparatus providing cyclic delay diversity in a digital multimedia broadcasting (DMB) system. In the gap filler apparatus, a receiver receives an orthogonal frequency division multiplexing (OFDM) signal transmitted as a broadcasting signal. A symbol synchronization unit acquires symbol synchronization of the OFDM signal, detects a guard interval of an OFDM symbol using the symbol synchronization, determines a sample length, by which the OFDM symbol is cyclic-delayed within the guard interval, and cyclic-delays the OFDM signal by the determined sample length. An amplifier amplifies the cyclic-delayed OFDM signal. A transmitter transmits the amplified OFDM signal to a wireless network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.