ملخص: 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 allow significantly increased bandwidth efficiency with little or no degradation in power efficiency. A hardware efficient demodulator structure using fast Walsh transforms is also presented.

لغة: إنجليزية
الموضوع الإعلام الآلي

الكلمات الدالة:
Evaluation performance
Taux erreur symbole
Filtre adapte
Modulation deplacement phase en quadrature
Canal bruit blanc gaussien additif
Transformation Walsh