Through analysis on principles of Binary Phase Shift Keying(2PSK) modulation and demodulation, the design scheme based on DSP Builder of DDS (Direct Digital frquency Synthesizer) is put forward. By using DSP Builder complete modulation and demodulation model, carrier signal was generated by DDS signal source. The circuit hardware structure of this design is simple and easy to implement. The mod...

We report on phase-shifted holographic interferogram demodulation by singular-value decomposition. Numerical processing of optically acquired interferograms over several modulation periods was performed in two steps: (1) rendering of off-axis complex-valued holograms by Fresnel transformation of the interferograms; and (2) eigenvalue spectrum assessment of the lag-covariance matrix of hologram ...

In this paper, a novel algorithm that resembles amplitude demodulation in the frequency domain is introduced, and its application to automatic speech recognition (ASR) is studied. Speech production can be regarded as a result of amplitude modulation (AM) with the source (excitation) spectrum being the carrier and the vocal tract transfer function (VTTF) being the modulating signal. From this po...

Received Nov 30, 2017 Revised Feb 4, 2018 Accepted Feb 17, 2018 In any communication system transmitter and receiver are used to transmit the signal via wired or wireless channel. In the transmitter, modulation is one of the processes to transmit the signal efficiently. Likewise, receiver contains demodulation to recover the original signal from the transmitter. In general, the communication sy...

A Laser Altimetry (LIDAR) system aboard an aircraft can yield highly accurate data about the ground surface and vegetation below. Raw LIDAR points must be processed to generate a digital elevation model (DEM), i.e. a digital map of the terrain surface. A number of techniques can be used to generate the DEM, and in this report I investigate several of these including a new algorithm based on rec...

The spatial orientation of the fringe has been demonstrated to be a key point in the reliable phase demodulation from a single n-dimensional fringe pattern regardless of the frequency spectrum of the signal. The recently introduced general n-dimensional quadrature transform (GQT) makes explicit the importance of the fringe orientation in the demodulation process. The GQT is a quadrature operato...

This paper proposes a carrier phase estimation of a power efficient APSK signal with a honeycombed constellation at a receiver in point-to-multi-point fixed wireless access systems using quasimillimeter frequency band. The signal has a lower amplitude level of a maximum signal vector than a conventional QAM signal. The signal also has a lower average output power. A reference carrier phase of t...

The system under study is a convolutionally coded and orthogonally modulated DS-CDMA system over timevarying frequency-selective Rayleigh fading channels in multiuser environments. Iterative soft demodulation and decoding using the Turbo principle can be applied to such a system to increase the system capacity and performance. To combat multiple access interference (MAI), we incorporate the int...

Parametric Array Loudspeaker is a directional sound technology that uses ultrasound amplitude modulation to generate audible in specific propagation path. The mathematical modeling of this an interesting problem cannot be tackled analytically due nonlinear phenomenon associated with the production from ultrasound, i.e. self-demodulation. Self-demodulation affects quality by both introducing und...

In this Master of Science thesis a simulation model of the HiperLAN/2 physical layer is designed and implemented. The model should provide insight in the demodulation functions that are necessary in HiperLAN/2 and it should be useful for determining channel selection and computational requirements for the software defined radio project at the University of Twente. The model is implemented in Ma...