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- Title
Design and Analysis of Grouping Non-Active Frequency -Time Index Modulation for Differential Chaos Shift Keying Communication System.
- Authors
Yaseen, Ruaa Abdulkareem; Hasan, Fadhil S.
- Abstract
This paper introduces a new index modulation method called Grouping Frequency-Time Index Modulation Non-Active for Differential Chaos Shift Keying (GFTIM-DCSK-II). The proposed system exploits the advantages of index modulation (IM) so that both the energy and spectrum efficiency of the system are enhanced. The suggested system effectively employs both frequency and time resources, allowing for efficient transmission at large data rates. For each symbol period, the new approach divides all data bits into equal G groups. For each group, the system includes frequency index bits, denoted as m1, which are utilized to choose a non-active subcarrier from a total of 2m1 subcarriers. Additionally, time index bits, denoted as m2, are employed to select a single time slot from 2m2 total time slots. After that, the modulated bits m0 are subjected to DCSK modulation and thereafter sent over the active subcarriers. Therefore, G(m0+m1+m2), where m0 = (2m1 2m2 - 1), is the total amount of bits transmitted with the GFTIM-DCSK-II system. To better demonstrate the distinctive characteristics of the proposed scheme the energy efficiency, complexity, and spectral efficiency of the GFTIM-DCSK-II system in comparison to the most advanced alternatives available are thoroughly analyzed. The system with q=8, m1=1, and m2=1 saves around 40% more energy than the CTIM-DCSK system also the proposed system enhanced the spectral efficiency around five times more than CTIM-DCSK and GSIMDCSK-II with q=8, m1 =1, and m2 =4. Bit error rate (BER) formulas across multipath Rayleigh fading channels and additive white Gaussian noise (AWGN) are calculated analytically. The proposed system showed an enhancement in BER performance around 5 dB than CI-DCSK2 and GSTIM-DCSKII across the AWGN channel at a BER of 10-4 at the same data rate.
- Subjects
ADDITIVE white Gaussian noise channels; RAYLEIGH fading channels; TELECOMMUNICATION systems; MOBILE communication systems
- Publication
International Journal of Intelligent Engineering & Systems, 2024, Vol 17, Issue 3, p744
- ISSN
2185-310X
- Publication type
Article
- DOI
10.22266/ijies2024.0630.58