The move is underway to coherent optical fiber for long-haul dense wavelength division multiplexing (DWDM). Here's what you need to know to test and optimize these optical networks. Fig 1. In this ...

This paper is the study of the QPSK (Quadrature Phase Shift keying) modulation technique using AWGN (Additive White Gaussian Noise) and Multipath Rayleigh fading channel. In QPSK scheme the authors ...

Free Space Optics is the technology which implies the line-of-sight link for the transfer of data between two distant points. The beam of light is used to provide optical connection that can transmit ...

This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, ...

To provide high-quality and multi-functional digital terrestrial television broadcasting (DTTB) services, STRL has been working on the R&D of an advanced DTTB system (hereinafter referred to as ...