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Initial Chaotic Value-Based Index Modulation for Wireless Communications
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DOI：10.1109/TCOMM.2024.3392746.png)
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Abstract
En 中文
In this paper, we develop a non-coherent differential chaos shift keying based index modulation by using initial value index (IVI-DCSK) to convey additional information for wireless communications. In the proposed scheme, mc mapped bits are carried by 2(c)(m) chaotic sequences by exploiting the quasi-orthogonality of different chaotic signals, while the modulated bit is carried by DCSK. To diminish the multiuser interference, the references allocated to different users are sent in individual time slots, while the information-bearing sequences for the mapped bits of users are sent simultaneously. We then derive the bit error rate (BER) expression of multi-user IVI-DCSK over multipath Rayleigh fading channels. The theoretical and consistent simulation results show that the proposed IVI-DCSK achieves significant gains over the conventional chaotic-based index modulations, i.e., permutation index DCSK (PI-DCSK) and code index modulation DCSK (CIM-DCSK). This gain can be more than 4 dB in fading channels with high multipath delay. In addition, it achieves higher energy and spectral efficiencies over the latter ones. The superiority of the proposed scheme is further verified in practical ultra-wideband (UWB) communications. Thus, this proposed scheme is efficient and promising for chaotic-based low-complexity communications, such as in wireless local area network (WLAN) and indoor applications.
Keywords:
Chaotic communication
Modulation
Indexes
Symbols
Codes
Wireless communication
Vectors
differential chaos shift keying (DCSK)
index modulation (IM)
multiple access (MA)
Journal
IF:
8.3
Papers:
1.2W
Citations:
3.6W