Affordable Access

Access to the full text

Orbital angular momentum multiplexing communication system over atmospheric turbulence with K-best detection

Authors
  • Ge, Yingmeng1, 1, 2
  • Wu, Liang1
  • Zhang, Chuan1, 1, 2
  • Zhang, Zaichen1, 2
  • 1 Southeast University, Nanjing, 211189, China , Nanjing (China)
  • 2 Purple Mountain Laboratories, Nanjing, 211189, China , Nanjing (China)
Type
Published Article
Journal
Science China Information Sciences
Publisher
Science China Press
Publication Date
Aug 09, 2021
Volume
64
Issue
9
Identifiers
DOI: 10.1007/s11432-019-2918-7
Source
Springer Nature
Keywords
Disciplines
  • Research Paper
License
Yellow

Abstract

As the optical communication technology advances, vortex beam with orbital angular momentum (OAM) has gained wide attention due to its potential to significantly increase the channel capacity. Under the influence of atmospheric turbulence, there are still challenging problems in the OAM multiplexing system. To the best of our knowledge, in this paper one multiple-input-multiple-output (MIMO) detection technology named K-best detection, is first applied to the OAM multiplexing system. Numerical simulation results indicate the proposed solution enhances the performance of the optical communication system compared with data-aided least mean square (DA-LMS) and minimum mean squared error (MMSE) detection. Furthermore, with MMSE sorted QR decomposition (MMSE-SQRD) preprocessing, the performance of K-best detection can be further improved. When Cn2 = 1×10−14, about 4.4 dB signal-to-noise ratio (SNR) gain can be obtained by preprocessing at k = 2 while the complexity is not significantly increased. Computational complexity is also analyzed in this paper, results show that K-best detection with winner path extension (WPE) algorithm can achieve 43% system complexity reduction, achieving a compromise between performance and complexity in K-best detection.

Report this publication

Statistics

Seen <100 times