It contains information on the scheme behind the operation of OFDM modulation and demodulation. It also includes some simulation figures if 4QAM modulation is used.
A discrete-time AM demodulator in Simulink to demodulate the AM modulated data contained in the file amdat.mat. You will design the discrete-time equivalent of both the noncoherent envelope detector and the fully coherent AM demodulator. There are t
This page explains what quadrature demodulation is and provides insight into the nature
of I/Q signals.
If you have read the previous page, you know what I/Q signals are and how quadrature
(i.e., I/Q-signal-based) modulation is accomplished. In this
A 1.55-\mu m all-solid frequency-modulated continuous-wave (FMCW) coherent lidar based on the sinusoidal frequency demodulation technique for range and velocity measurement is presented. Both the nonlinearity of linear modulation waveform and the dif
We propose a scheme for mitigating Rayleigh backscattering noise and demodulating differential phase-shift keying (DPSK) signals in wavelength-division-multiplexed passive optical networks (WDM-PONs) with injection-locked Fabry-Perot laser diodes (FP
The method of demodulation with two parallel matched fiber Bragg gratings (FBGs) system is introduced to enlarge the range of strain that can be detected by the FBG sensor system.
The mechanism of measuring temperature and strain using FBG has been studied deeply, however, signal demodulation has not been thoroughly solved. A novel demodulation system using CCD and a temperature sensing system are designed.
A novel method of linear demodulation based on edge filter is presented. An experimental system is built up in which LPG is used as the edge filter. We achieve linear demodulation with a bandwidth of 5 nm.
A novel way of edge filter demodulation for fiber Bragg grating sensor is put forward. A high birefringence fiber Sagnac loop mirror is used as edge filter to demodulate FBG sensor wavelength shift in range of about 8 nm.
We propose a cavity length demodulation method that combines virtual reference interferometry (VRI) and minimum mean square error (MMSE) algorithm for fiber-optic Fabry–Perot (F-P) sensors. In contrast to the conventional demodulating method that use
