In this paper, field measurements carried out in a suburban SFN network with two synchronized transmitters are reported. It is found that the radio signal coverage of the distributed transmission scheme is distinctly improved when compared to a single transmitter system. The path loss gain and improvement associated to the SFN scheme are obtained as well as the multipath channel parameters incl...

This paper analyzes performances of the Pulse Interval Modulation (PIM) scheme for impulse radio ultra-wideband (IR-UWB) communication systems. Due to the PIM anisochronous nature, a tap delay line (TDL) coded division multiple access (CDMA) scheme based on strict optical orthogonal codes (SOOC) is proposed. This scheme is suitable for multiuser high-speed data asynchronous transmission applica...

single tap actually consists or four diodes distributed at 2 pS effective delay time along the line and tied together at the tap output. Fig. 2 shows the evolutio.n or the coincidence or two input pulses. The peak detector taps are biased such that neither the clock nor the trigger signal alone is large enough in amplitude to cause forward bias or the peak detector taps. This is the case at tim...

Digital filters have three components: (1) unit delays, (2) multipliers, and (3) adders. These components can be implemented by using (1) a Bragg cell as a tapped delay line, (2) optical multiplication using the Bragg cell transmittance, and (3) photodetectors. Multiplexing techniques are shown to increase geometrically the data handling capacity of such filters. An architecture for a 2-D digit...

This article describes a flexible architecture for Real-Time Granular Synthesis that accommodates a number of Granular Synthesis variants including Tapped Delay Line, Stored Sample and Synthetic Grain Granular Synthesis in both Pitch Synchronous and Asynchronous forms. Three efficient algorithms for generating grain envelopes are reviewed and two methods for generating stochastic grain onset ti...

Wideband CDMA systems with orthogonal spreading codes suffer severely due to the loss of orthogonality by multipath propagation. This yields Multiple Access Interference (MAI) which gravely reduces the performance of classical systems with Rake-receivers. In our approach we attempt to restore orthogonality again by using a fractional T-equalizer. The results are compared with a system using the...

In this paper, we propose a new channel estimation algorithm for low earth orbit satellite digital communications. Low earth orbit satellite channels impart severe spreading in delay and Doppler on the transmitted signal. We model the channel as a tapped-delay-line lter with time-varying complex coe cients. The time evolution of the taps is described by an auto-regressive model. A coupled lter ...

In this paper a traditional Multi Layer Perceptron with a tapped delay line as input is trained to identify the parameters of the Chua’s circuit when fed with a sequence of values of a scalar state variable. The analysis of the a priori identifiability of the system, performed resorting to differential algebra, allows one to choose a suitable observable and the minimum number of taps. The resul...

Industrial IoT-enabled critical infrastructures are susceptible to cyber attacks due their mission-critical deployment. To ensure security by design, radio frequency (RF)-based is considered an effective way for wirelessly monitored or actuated infrastructures. For this purpose, paper presents a novel augmentation-driven deep learning approach analyze unique transmitter fingerprints and determi...

This paper describes the system being constructed to steer the transmitted beam pattern of the KiwiSAS-IV synthetic aperture sonar. This sonar is being developed by the Acoustics Research Group at the University of Canterbury for high-resolution seafloor imagery and bathymetry. The goal is to steer the transmitted beam horizontally for spotlight-mode aperture synthesis. The beam-steering is per...