Synchronization symbol structure using OFDM based transmission method
USRE40568E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2005 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Nov 23, 2025 |
Classification
- Technology area (CPC —)General
Abstract
The present invention proposes a method for generating synchronization bursts for OFDM transmission systems. The symbols of a predefined symbol sequence are mapped according to a predefined mapping scheme on subcarriers of the OFDM systems by a mapping unit (2), wherein the symbols of the predefined symbol sequence represent subcarriers of the OFDM system with nonzero amplitudes. A synchronization burst is generated by a inverse fast Fourier transforming unit (3) transforming the subcarriers of the OFDM system mapped to said predefined symbol sequence. The mapping (2) of the symbols of the predefined symbol sequence is set such that the resulting time domain signal of the synchronization burst represents a periodic nature. According to the invention the predefined symbol sequence is set such that the envelope fluctuation of the time domain signal of the synchronization burst is minimized. Therefore advantageous symbol sequences reducing said the envelope fluctuation of the time domain signal are proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.