Improved Tent Map and Its Applications in Image Encryption

Abstract

In this paper, an improved tent map chaotic system with better chaotic performance is introduced.

Performance analysis of modified tent map interleaver in IDMA systems

“…This parameter decides the qualitative behaviour of system and produce chaotic region for the values of m ∈ (1, 2]. To increase the randomness of classical tent map, the improved and modified tent map has been suggested [12] and can be written as…”

“…The state values of improved Tent map shows larger randomness [12], so the interleaver based on modified Tent map provides better BER performance in IDMA system. Further, modified Map has larger values of Lyapunov exponents (LE), which implies that system (4) has better chaotic behaviour than classical Tent map.…”

“…In this paper, a new chaotic map based interleaving design is being introduced named as "Modified Tent Map Interleaver" (MTMI) in IDMA scheme. The proposed interleaver has stronger randomness, relatively larger Lyapunov exponent, less computational complexity and memory requirement [11][12][13][14] 2 System Model This is to note that the conventional code-division multiple access (CDMA) systems have some limitations and to mitigate them, IDMA system has been proposed. In IDMA system, users are separated by user specific chip-level interleavers.…”

“…The storage system industry motivated research into relatively complex RLLECCs based on turbo codes and low density parity check (LDPC) codes [7][8][9][10][11]. Recently, new RLL Codes were proposed for visible light communication (VLC) systems together with soft decoding methods [12][13][14]. In [15] algorithms were presented for code design using finite state machines which simultaneously provide a coding gain while also mitigating flicker in VLC.…”

A Fast Computational Interleaver Design for Iterative IDMA Scheme Based on Tent Map and Chaos

“…Orthogonal interleaver requires large number of orthogonal signals which are not easy to generate. On the other hand, the use of shifting interleaver provide better performance but not suitable for multi-user detector (MUD) receiver [13][14][15][16]. Recently, the use of chaos become popular into spread spectrum communication systems.…”