LDPC coded angular modulation scheme for cooperative wireless networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper investigates a new methodology for soft information forwarding (SIF) based on a novel technique known as soft angular modulation (SAM). In this new relay scheme, the soft symbols are embedded into phases at the relay. This is more advantageous as we refrain to forward real values (under bandwidth constraints) via wireless channels. This makes the proposed scheme practically feasible. The proposed system provides a means of using distributed low-density parity-check (LDPC) coding in conjunction with a new soft encoding scheme (puncturing), which is useful even under indigent source-relay link conditions. This also precludes the amplitudes of generated symbols descent to zero, as happens with most of the existing soft forwarding methods. Ordinarily, such schemes suffer from error propagation to the destination when the signal-to-noise ratio (SNR) of the source-relay link is low; however, our system avoids this problem by regenerating soft versions of the source symbols at the relay. Furthermore, we also propose a computationally efficient formula for log-likelihood ratio (LLR) at the destination. Simulation results demonstrate that the proposed scheme can maintain very good performance under poor source relay SNR conditions.

Original languageEnglish
Title of host publication2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509017010
DOIs
Publication statusPublished - 17 Mar 2017
Event84th IEEE Vehicular Technology Conference, VTC Fall 2016 - Montreal, Canada
Duration: 18 Sep 201621 Sep 2016

Conference

Conference84th IEEE Vehicular Technology Conference, VTC Fall 2016
CountryCanada
CityMontreal
Period18.9.1621.9.16

Fingerprint

Cooperative Networks
Parity
Relay
Wireless Networks
Wireless networks
Signal to noise ratio
Modulation
Piercing
Bandwidth
Log-likelihood Ratio
Error Propagation
Descent
Encoding
Coding
Methodology
Zero
Demonstrate
Simulation

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Jayakody, D. N. K. (2017). LDPC coded angular modulation scheme for cooperative wireless networks. In 2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings [7881067] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/VTCFall.2016.7881067

LDPC coded angular modulation scheme for cooperative wireless networks. / Jayakody, Dushantha Nalin K.

2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017. 7881067.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Jayakody, DNK 2017, LDPC coded angular modulation scheme for cooperative wireless networks. in 2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings., 7881067, Institute of Electrical and Electronics Engineers Inc., 84th IEEE Vehicular Technology Conference, VTC Fall 2016, Montreal, Canada, 18.9.16. https://doi.org/10.1109/VTCFall.2016.7881067
Jayakody DNK. LDPC coded angular modulation scheme for cooperative wireless networks. In 2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2017. 7881067 https://doi.org/10.1109/VTCFall.2016.7881067
Jayakody, Dushantha Nalin K. / LDPC coded angular modulation scheme for cooperative wireless networks. 2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017.
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