Digital baseband modulation apparatus and demodulation apparatus
US7545884B2 · kind B2 · utility
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12References
7Claims
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Key dates
| Filing date | Jan 14, 2004 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Sep 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3411
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital baseband modulation apparatus includes: a spread modulation part for complex spreading an I component signal and a Q component signal of a send signal so as to output an output signal; and an amplitude conversion part for decreasing the amplitude component of the output signal to the half when the output signal is output on the I axis or on the Q axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.