Transmission device, reception device and radio communication method
US7724638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2002 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Mar 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
On a transmitting side, a spread modulated signal that has undergone spread spectrum processing and an information modulated signal that has not undergone spread spectrum processing are multiplexed in a same frequency band. On the receiving side, the specific modulated signal is first demodulated by a spread spectrum demodulation section, then a replica signal of the specific modulated signal is generated by a spread spectrum modulated signal regeneration section, and the information signal that has not undergone spread spectrum processing is extracted by eliminating the replica signal from the multiplex signal. Thus, even when a large number of information signals are transmitted in a same frequency band, these signals can be separated and demodulated satisfactorily on the receiving side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.