Modulating a digital signal with narrow spectrum and substantially constant envelope
US6868126B1 · kind B1 · utility
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Key dates
| Filing date | Dec 21, 1998 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Dec 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03834
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmission signal (S) resulting from modulation of a digital data signal by a modulation function dependent on time t, the data signal being formed of a series of bits (bk) each identified by its rank k and having a duration T, the transmission signal (S) consisting of a summation indexed to the rank k of the product of the complex constant j to the power k, of the modulation function (h(t−kT) and of an input signal. The input signal F(k) being a function of the data signal (bk), the modulation function h(t−kT) is a Gaussian function of time t.
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