OFDM-CDMA communication terminal apparatus and method
US7161895B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2000 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Dec 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0017
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An OFDM-CDMA transmission apparatus may include a first spreader that carries out spreading processing on a plurality of transmission signals using different spreading codes, respectively. A second spreader carries out spreading processing on at least one known signal using a spreading code different from the spreading codes employed by the first spreader. A frequency division multiplexer breaks down the transmission signals spread by the first spreader and the known signal spread by the second spreader into individual chips and subjects these chips to frequency division multiplexing, thereby assigning one chip data signal string per subcarrier. The frequency division multiplexer operates such that information from each of the plurality of transmission signals and the known signal is multiplexed into every chip assigned to a different subcarrier. After the chips are assigned to the subcarriers, they are transmitted by a transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.