Computational Complexity and Bandwidth Resource Analysis of NLM Interleaver in IDMA System

Akbil, Brahim; Ferré, Guillaume; Aboutajdine, Driss

doi:10.1007/978-3-642-32384-3_30

Cited by 3 publications

(5 citation statements)

References 7 publications

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“…However, many applications use the sequences of N random integers in [0 N] such as the interleaverldeinterleaver in IDMA systems. For that reason, the authors developed in [7] a new one-dimensional chaotic map, named "New Logistic Map (NLM)" described by:…”

Section: Spreading Codesmentioning

confidence: 99%

“…We calculate the states {X" X2 , ..... , XN} occupied by the system; these states form a set of real sequences between 0 and N. We construct an initial value for the next group g+ 1 by adding a footstep p to the XUo [7]. The transition to the integer sequences is realized by maximizing rXl, minimizing LXS or by using a floor [X] to remove the decimal numbers and keep only the main integers.…”

Section: Spreading Codesmentioning

confidence: 99%

“…For this reason, several authors have developed different spreading codes such as PN sequence, gold sequence, Walsh code and chaotic code, and others authors have developed new designs of interleaver, such as the Orthogonal Interleaver (01), Random Interleaver (RI), Pseudorandom Interleaver (PRI), Nested Interleaver (NI) [4], Shifting Interleavers (SI) [5], Deterministic Interleaver (D!) [6] and NLM interleaver [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spreading code and interleaver design for grouped CDMA-IDMA (G-CDMA-IDMA) based on a single parameter

Akbil

Aboutajdine

2014

2014 International Conference on Multimedia Computing and Systems (ICMCS)

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In this paper, we propose a new technique to generate the spreading code for "spread spectrum", and the interleaver matrix for interleaving the data stream, by using a single parameter. This parameter is the initial state of a new chaotic system, called new logistic map (NLM). To evaluate the performances of our proposed technique (called CI-NLM technique), we use a new multiple access scheme known as groupedcode division multiple access-interleave-division multiple access (G-CDMA-IDMA), where the users are divided into smaller groups. When each group transmits at the same time, over the same frequencies and the same interleaver, and wecan separate the user's information of a group by using the spreading code (the same interleaver is assigned to all users of a group and the same spreading codes are reused in adjacent groups). By means of simulation results, we show that our proposed technique can be used to reduce the computational complexity, the bandwidth consumption, and achieve the same correlation and better BER performances compared to the conventional IDMA system.

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Section: Spreading Codesmentioning

confidence: 99%

Section: Spreading Codesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spreading code and interleaver design for grouped CDMA-IDMA (G-CDMA-IDMA) based on a single parameter

Akbil

Aboutajdine

2014

2014 International Conference on Multimedia Computing and Systems (ICMCS)

Self Cite

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show abstract

“…Here, we modified the logistic map [30] and developed, as explained in [16], a new one-dimensional chaotic map, named "New Logistic Map (NLM)". To generate the spreading codes and the interleavers' matrix of all users we use the NLM described by:…”

Section: Generating the Interleavers And Spreading Codes: Proposed Al...mentioning

confidence: 99%

“…The results of NLM chaotic behavior (Lyapunov exponents and bifurcation diagram) and its stability points are presented in [16]. The system (1) will be chaotic when the signs of Lyapunov exponents are all positive or when λ>3.58.…”

Section: Generating the Interleavers And Spreading Codes: Proposed Al...mentioning

confidence: 99%

Improved IDMA for Multiple Access of 5G

Akbil

Aboutajdine

2022

Int. j. commun. netw. inf. secur.

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Due to its good performance and low complexity, IDMA is believed to be an important technique for future radio access (FRA). However, its performances are highly affected by the interleaver design. In this paper we propose two contributions to improve the performance of the IDMA. First, we propose a new interleaver design, called "NLM interleaver", which improves the computational complexity, reduces the bandwidth consumption and the memory requirements of the system, provides the quasi-orthogonal spreading codes and interleavers with a high security and offers infinite sets of codes and interleavers based on only one parameter. Second, we propose a new user grouping algorithm based on the correlation function to improve the resources (Codes, Interleavers). All users are divided into several equal-size groups where each group's data transmitted at the same time, over the same frequencies and the same interleaver. The simulation results indicate that the proposed scheme can achieve better performances compared to the existing algorithms.

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On the correlation of chaotic signals generated by multimodal skew tent map

Sahnoune

Berkani

2018

SIViP

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Computational Complexity and Bandwidth Resource Analysis of NLM Interleaver in IDMA System

Cited by 3 publications

References 7 publications

Spreading code and interleaver design for grouped CDMA-IDMA (G-CDMA-IDMA) based on a single parameter

Spreading code and interleaver design for grouped CDMA-IDMA (G-CDMA-IDMA) based on a single parameter

Improved IDMA for Multiple Access of 5G

On the correlation of chaotic signals generated by multimodal skew tent map

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