OFDM communication device
US7697498B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2004 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Apr 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26134
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To provide high-quality communication even when the power for synchronization preamble is reduced in an OFDM communication device. To achieve symbol synchronization, an OFDM communication device obtains a zero amplitude reduced preamble signal by passing a specified synchronization preamble through an ideal low-pass filter to reduce a signal component near zero amplitude within a time domain, and time-multiplexes the obtained zero amplitude reduced preamble signal with transmit data to generate an OFDM transmit signal. A receiver section of the OFDM communication device determines the cross correlation between a receive signal and a specified synchronization preamble, which is patterned the same as the counterpart in a transmitter section of the OFDM communication device, and detects a synchronization position in accordance with the determined cross correlation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.