OFDM demodulation circuit and OFDM reception apparatus using the same
US7519121B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2002 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Aug 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2662
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An OFDM demodulation circuit capable of initiating a demodulation process within a short period of time after the reception of a signal and terminating the demodulation early if it has been initiated erroneously, and an OFDM reception apparatus employing the OFDM demodulation circuit. If a threshold value Sth2 in peak detector 122 is not exceeded within a predetermined time T following the output of a symbol timing signal from peak detector 121, namely if a continuation timing signal is not supplied from peak detector 122 to a demodulation process terminating circuit 162 before demodulation process terminating circuit 162 counts predetermined time T (step S115), demodulation process terminating circuit 162, determining that the position at which the demodulation process has been started was wrong, terminates the currently executed demodulation process soon after the completion of the counting of predetermined time T and returns to a received-signal awaiting state (step S111).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.