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Updated: Apr 23, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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A novel error detection due to joint CRC aided denoise-and-forward network coding for two-way relay channels.

Yulun Cheng1, Longxiang Yang1

  • 1Jiangsu Key Lab of Wireless Communications, Nanjing University of Posts & Telecommunications, Nanjing 210003, China ; Key Lab of Broadband Wireless Communication & Sensor Network Technology, Ministry of Education, Nanjing 210003, China.

Thescientificworldjournal
|September 24, 2014
PubMed
Summary

A new joint cyclic redundancy code (CRC) check method improves wireless network coding (NC) reliability. This technique enhances spectral efficiency in two-way relay channels while reducing complexity.

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Area of Science:

  • Wireless communication systems
  • Information theory
  • Coding theory

Background:

  • Denoise-and-forward (DNF) network coding (NC) enhances spectral efficiency in wireless two-way (TW) relay channels.
  • Relay detection failures degrade diversity gain and end-to-end pairwise error probability (PEP).

Purpose of the Study:

  • To introduce a novel joint cyclic redundancy code (CRC) check method (JCRC) for TW DNF NC systems.
  • To improve the reliability and performance of NC signals in wireless relay channels.

Main Methods:

  • Exploiting the properties of two combined NC CRC codewords to develop the JCRC method.
  • Deriving detection probability bounds for the JCRC method.
  • Proposing three JCRC-aided TW DNF NC schemes and deriving their PEP performance.

Main Results:

  • The JCRC method effectively evaluates the reliability of NC signals.
  • JCRC-aided TW DNF NC schemes achieve comparable PEP to separate CRC methods.
  • The proposed schemes reduce computational complexity by half compared to separate CRC approaches.

Conclusions:

  • The JCRC method offers a more efficient and reliable approach for TW DNF NC.
  • The proposed JCRC-aided schemes outperform conventional methods using log-likelihood ratio thresholds.
  • This work contributes to improving the performance of wireless relay communication systems.