441 research outputs found
Performance evaluation of various decision schemes for frequency demodulator of narrow-band digital FM signals in land mobile radio
QDPSK signal transmission performance with postdetection selection diversity reception in land mobile radio
Experimental evaluation of postdetection diversity reception of narrow-band digital FM signals in Rayleigh fading
A spin Esaki diode
We demonstrate electrical electron spin injection via interband tunneling in
ferromagnetic/nonmagnetic semiconductor Esaki diodes. An interband tunnel
junction between ferromagnetic p+-(Ga,Mn)As and nonmagnetic n+-GaAs under
reverse-bias allows spin-polarized tunneling of electrons from the valence band
of (Ga,Mn)As to the conduction band of n+-GaAs. The spin polarization of
tunneled electrons is probed by circular polarization of electroluminescence
(EL) from an n-GaAs/InGaAs/p-GaAs light emitting structure integrated with the
diode. Clear hysteresis loop with +-6.5% remanence is observed in the
magnetic-field dependence of the EL polarization at 6 K, below the Curie
temperature of (Ga,Mn)As.Comment: 11pages, 4figures. Submitted Japanese Journal of Applied Physics Pt2
Express Lette
Postdetection selection diversity reception with correlated, unequal average power Rayleigh fading signals for π/4-shift QDPSK mobile radio
Toward determination of the singular fibers of minimal degeneration of surfaces with k=0
- …