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Design Example01:23

Design Example

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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...
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Mesh Analysis for AC Circuits01:12

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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
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Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Updated: Mar 29, 2026

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Design and Performance Analysis of an RIS-Empowered RM-DCSK System for Wireless Powered Communication.

Fang Liu1, Junjun Ma1, Qihao Yu2

  • 1School of Information Science and Engineering, Shenyang Ligong University, Shenyang 110159, China.

Entropy (Basel, Switzerland)
|March 28, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a reconfigurable intelligent surface (RIS)-empowered wireless powered communication system using reference-modulated differential chaos shift keying (RM-DCSK). The novel system enhances spectral efficiency and reduces receiver complexity while achieving superior bit error rate performance.

Keywords:
bit error ratechaotic communicationreconfigurable intelligent surfacereference-modulated differential chaos shift keyingwireless powered communication

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Area of Science:

  • Wireless Communication Systems
  • Information Theory
  • Signal Processing

Background:

  • Noncoherent chaotic communication schemes offer low receiver complexity.
  • Wireless Powered Communication (WPC) faces path loss challenges.
  • Reconfigurable Intelligent Surfaces (RIS) can optimize wireless environments.

Purpose of the Study:

  • To propose a novel RIS-empowered RM-DCSK system for WPC.
  • To improve spectral efficiency and reduce receiver complexity.
  • To enable sustainable uplink transmission with energy harvesting.

Main Methods:

  • Developed a harvest-store-use (HSU) energy model with a finite buffer and on/off transmission policy.
  • Utilized RIS to reconfigure the propagation environment and mitigate WPC path loss.
  • Derived closed-form bit error rate (BER) expressions under multi-path Rayleigh fading.

Main Results:

  • The proposed RIS-RM-DCSK-WPC system demonstrates superior BER performance.
  • Reference reuse in RM-DCSK improves spectral efficiency and simplifies reception.
  • The HSU model and on/off policy enable sustainable WPC.

Conclusions:

  • The integration of RIS and RM-DCSK significantly enhances WPC performance.
  • The proposed system offers a promising solution for efficient and sustainable wireless communication.
  • The developed analytical framework validates the system's advantages over existing benchmarks.