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Related Concept Videos

Network Function of a Circuit01:25

Network Function of a Circuit

Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next sampling...
Bewley Lattice Diagram01:12

Bewley Lattice Diagram

The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
Block Diagram Reduction01:22

Block Diagram Reduction

The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
Vector Algebra: Graphical Method01:10

Vector Algebra: Graphical Method

Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...

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Related Experiment Video

Updated: Jun 22, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Optical realization of Viterbi decoder for communication network.

Zeev Zalevsky, Shai Ben-Yaish, Eliyahu Guetta

    Optics Express
    |June 18, 2009
    PubMed
    Summary

    This study integrates optics into Viterbi decoders to boost processing speed for digital communications. The modular optical switch design enhances capabilities for convolution codes and inter-symbol interference mitigation.

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    Published on: November 26, 2019

    Area of Science:

    • Digital communication systems engineering
    • Optical computing and signal processing

    Background:

    • Viterbi decoders are crucial for error correction in digital communications.
    • Current Viterbi decoder limitations include processing speed and scalability.
    • Optics offer high processing speed and information throughput advantages.

    Purpose of the Study:

    • To accelerate the processing rate and enhance the capabilities of Viterbi decoders.
    • To apply optical advantages like speed, modularity, and versatility to Viterbi decoding.
    • To address challenges in convolution codes, speech recognition, and inter-symbol interference (ISI) mitigation.

    Main Methods:

    • Designing a Viterbi decoder configuration utilizing fast optical switches.
    • Implementing a modular architecture for scalability.
    • Developing a state machine-based approach for trellis diagram expansion.

    Main Results:

    • Demonstrated potential for significantly increased processing rates in Viterbi decoders.
    • Achieved a modular and versatile decoder configuration.
    • Showcased the feasibility of optical switches for high-performance Viterbi decoding.

    Conclusions:

    • Optical Viterbi decoders offer a promising solution for high-speed digital communication.
    • The proposed modular design allows for easy scalability to complex decoding tasks.
    • This approach effectively enhances capabilities for convolution codes and ISI mitigation.