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Related Concept Videos

PD Controller: Design01:26

PD Controller: Design

In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
LC Circuits01:21

LC Circuits

An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
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.
PI Controller: Design01:24

PI Controller: Design

Proportional Integral (PI) controllers are a fundamental component in modern control systems, widely used to enhance performance and mitigate steady-state errors. They are particularly effective in applications such as automatic brightness adjustment on smartphones, where they excel at mitigating steady-state errors for step-function inputs. Unlike PD controllers, which require time-varying errors to function optimally, PI controllers leverage their integral component to address residual...
Design Example01:23

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
Clipper Circuit01:18

Clipper Circuit

A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...

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Related Experiment Videos

An LDPC decoder architecture for wireless sensor network applications.

Andrea Dario Giancarlo Biroli1, Maurizio Martina, Guido Masera

  • 1Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy. andreadariogiancarlo.biroli@studenti.polito.it

Sensors (Basel, Switzerland)
|March 23, 2012
PubMed
Summary
This summary is machine-generated.

Wireless sensor energy dissipation is reduced using Low Density Parity Check (LDPC) coded communication. This method offers significant energy savings per bit compared to uncoded transmissions.

Keywords:
LDPC decoder architecturepower consumptionwireless sensor networks

Related Experiment Videos

Area of Science:

  • Electrical Engineering
  • Computer Science

Background:

  • Wireless sensors are increasingly used in various human activities.
  • Low energy dissipation is crucial for these devices.

Purpose of the Study:

  • To investigate coded communication for reducing energy per bit in wireless sensors.
  • To evaluate the effectiveness of Low Density Parity Check (LDPC) codes.

Main Methods:

  • Considered coded communication between wireless sensor devices.
  • Utilized different Low Density Parity Check (LDPC) codes.
  • Performed post-layout simulations for a low-area, low-energy decoder.

Main Results:

  • Coded communication significantly reduces energy dissipation per transmitted bit.
  • Energy savings ranged from 40% to 80% compared to uncoded communication.
  • Savings depend on the environment, distance, and desired bit error rate.

Conclusions:

  • Low Density Parity Check (LDPC) coded communication is an effective strategy for energy reduction in wireless sensors.
  • The developed low-energy decoder achieves substantial power savings.
  • This approach is vital for the proliferation of energy-efficient wireless sensor networks.