The paper presents a novel approach for the analysis and control of distributed systems with an underlying path-graph topology based on the so-called wave-based control perspective. With the help of irrational wave transfer functions, the approach allows us to identify and describe the travelling waves in heterogenous path graphs. The main advantage of this approach is that it shows how a chang...

Chirp-controlled optical modulation is demonstrated using a voltage division scheme applied to a long-section phase modulator to compensate for the positive chirp of an electroabsorption modulator arranged in a tandem configuration. Both modulators are integrated with a semiconductor optical amplifier (SOA) and a sampled-grating distributed Bragg reflector (DBR) laser. The effective chirp facto...

The paper considers a method for maintaining quasi-soliton mode in multi-span fiber-optic communication system using discrete Erbium optical amplifiers, as well Raman amplifiers with distributed amplification counter and bidirectional pumping. OptiSystem 19 OptiPerformer programs were used to model systems. simulation results are compared theoretical data, the advantages of amplifier pumping de...

energy consumption is considered as a critical issue in wireless sensor networks (wsns). batteries of sensor nodes have limited power supply which in turn limits services and applications that can be supported by them. an efcient solution to improve energy consumption and even trafc in wsns is data aggregation (da) that can reduce the number of transmissions. two main challenges for da are: (i)...

The paper describes the outline of 2D-discrete cosine change (DCT) which is generally utilized as a part of picture and video pressure calculations. The target of this paper is to plan a completely parallel distributed arithmetic (DA) architecture for two dimensional (2D) DCT to be implemented in Xilinx. DCT requires extensive measure of scientific calculations including multiplications and col...

This paper presents the realization of memory efficient architecture using Distributed Arithmetic (DA) for implementation of Finite Impulse Response (FIR) filter. Here, the multipliers in FIR filter are replaced with multiplier less DA based technique. First, the theory of DA is described. In this technique, pre-computed values of inner product are stored in LUT, which are further added and shi...

In this paper, an ultra-low-noise amplifier with frequency band switching capability is designed, simulated and fabricated. The two frequency ranges of this amplifier consist of the 2.4 to 2.5 GHz and 3.1 GHz to 3.15 GHz frequency bands. The designed amplifier has a noise figure of less than 1dB, a minimum gain of 23 dB and a VSWR of less than 2 in the whole frequency band. The design process s...

Distributed Antenna Systems Halim Yanikomeroglu Elvino S. Sousa Department of Electrical and Computer Engineering | University of Toronto E-mails: fhalim,[email protected] ABSTRACT | In this study the relationship between the number of antenna elements in a CDMA distributed antenna (DA) system and the yielding reverse link SIR is investigated by taking power control dynamic range into acc...

The implementation of Low Noise Amplifier (LNA) front-ends is one of the challenging aspects in emerging Ultra Wide-Band (UWB) radio frequency (RF) systems. As it is highly desirable to achieve complete system-on-chip (SoC) integration, several CMOS based LNA implementations have been reported recently. The first part of this thesis presents a comparative study that helps designers understand t...