Signal transmitting apparatus, method thereof, and inverse fast fourier transform apparatus for signal transmitting apparatus
US8718153B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 17, 2008 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jan 14, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/263
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal transmitting apparatus according to an embodiment of the present invention receives data, and performs inverse fast Fourier transform (IFFT) on the data on the basis of a twiddle factor for shifting output data by the size of a cyclic prefix. In addition, the signal transmitting apparatus sequentially stores data corresponding to the size of the cyclic prefix starting with initial data among the transformed data, and generates an OFDM symbol on the basis of the stored data and the transformed data. According to the embodiment of the present invention, it is possible to efficiently reduce a time delay and a memory use amount when a cyclic prefix is added at a transmitting end, without changing the size of hardware and power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.