Original scientific paper

https://doi.org/https://doi.org/10.24138/jcomss-2024-0072

Investigating the Performance of Coded GSIM DCSK Communication Systems over Multipath Rayleigh Fading Channel

Ali Jaber Al-Askery ; Middle Technical University, Baghdad, Iraq
Fadhil Sahib Hasan ; College of Engineering, Mustansiriyah University, Baghdad, Iraq
Ahmed A. Thabit ; Middle Technical University, Baghdad, Iraq

Abstract

Index modulation−based differential chaos shift keying (IM−DCSK) is a promising technique in wireless communication systems. Among all schemes, a Grouping Subcarrier Index Modulation DCSK (GSIM−DCSK) supports suit−coded modulation to improve bit error rate (BER) over a multipath Rayleigh fading channel, known as Coded GSIM−DCSK (CGSIM−DCSK) system. In the proposed method, all the index modulation bits are detected at the receiver side and then converted into a bipolar form to pass them through the channel decoder system along with the soft modulated bits. The results show that CGSIM−DCSK system with two schemes that are CGSIM−DCSK1 and CGSIM−DCSK2 are improved by the proposed coding techniques, with the LDPC code barely superior to the New Radio−Polar Code (NRPC). Furthermore, the performance of CGSIM−DCSK1 outperforms that of CGSIM−DCSK2 with lower information rate.

Keywords

Grouping Subcarrier Index Modulation based DCSK; LDPC; NRPC; multipath Rayleigh fading channel

Hrčak ID:

323518

URI

https://hrcak.srce.hr/323518

Publication date:

31.12.2024.

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