Title of article
A bandwidth-power efficient modulation scheme based on quaternary quasi-orthogonal sequences
Author/Authors
Kim، Youhan نويسنده , , Yang، Kyeongcheol نويسنده , , Cheun، Kyungwhoon نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
-292
From page
293
To page
0
Abstract
A novel modulation scheme suitable for noncoherent demodulation based on quaternary quasi-orthogonal sequences is proposed. Compared to orthogonal modulation, the controlled quasi-orthogonality between the sequences allows significantly increased bandwidth efficiency with little or no degradation in power efficiency. A hardware efficient demodulator structure using fast Walsh transforms is also presented.
Keywords
Intersubband transitions , mid-infrared , multiple-wavelength emission , quantum cascade laser , Quantum wells , Second-harmonic generation , nonlinear optics
Journal title
IEEE Communications Letters
Serial Year
2003
Journal title
IEEE Communications Letters
Record number
90117
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