Design of an interleaver with criteria to improve the performance of turbo codes in short block lengths

Urrea, Claudio; Kern, John; López-Escobar, Ricardo

doi:10.1007/s11276-022-02912-2

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…These codes find extensive applications in the scenarios of low Bit-Error-Rate (BER) missions without any additional specific power requirements. The advent of turbo codes has paved the direction for the researchers in designing efficient codes that can be decoded with the least complexity as well [26]. These demanding codes approaching the Shannon's theoretical limit are based on the RSC codes for achieving the near-limit capacity as highlighted in the pioneering work of Shannon.…”

Section: Figure 1: State Machine Diagram Of Convolutional Codingmentioning

confidence: 99%

SP-DSTS-MIMO Scheme-Aided H.266 for Reliable High Data Rate Mobile Video Communication

Ullah¹,

Minallah²,

Nayab³

et al. 2023

Computers, Materials &Amp; Continua

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With the ever growth of Internet users, video applications, and massive data traffic across the network, there is a higher need for reliable bandwidth-efficient multimedia communication. Versatile Video Coding (VVC/H.266) is finalized in September 2020 providing significantly greater compression efficiency compared to Highest Efficient Video Coding (HEVC) while providing versatile effective use for Ultra-High Definition (HD) videos. This article analyzes the quality performance of convolutional codes, turbo codes and self-concatenated convolutional (SCC) codes based on performance metrics for reliable future video communication. The advent of turbo codes was a significant achievement ever in the era of wireless communication approaching nearly the Shannon limit. Turbo codes are operated by the deployment of an interleaver between two Recursive Systematic Convolutional (RSC) encoders in a parallel fashion. Constituent RSC encoders may be operating on the same or different architectures and code rates. The proposed work utilizes the latest source compression standards H.266 and H.265 encoded standards and Sphere Packing modulation aided differential Space Time Spreading (SP-DSTS) for video transmission in order to provide bandwidth-efficient wireless video communication. Moreover, simulation results show that turbo codes defeat convolutional codes with an averaged E b /N 0 gain of 1.5 dB while convolutional codes outperform compared to SCC codes with an E b /N 0 gain of 3.5 dB at Bit Error Rate (BER) of 10 −4 . The Peak Signal to Noise Ratio (PSNR) results of convolutional codes with the latest source coding standard of H.266 is plotted against convolutional codes with H.265 and it was concluded H.266 outperform with about 6 dB PSNR gain at E b /N 0 value of 4.5 dB.

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Section: Figure 1: State Machine Diagram Of Convolutional Codingmentioning

confidence: 99%

SP-DSTS-MIMO Scheme-Aided H.266 for Reliable High Data Rate Mobile Video Communication

Ullah¹,

Minallah²,

Nayab³

et al. 2023

Computers, Materials &Amp; Continua

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“…Techniques for blind code identi cation have gained increasingly more attention from researchers, and several types of channel codes such as low-density parity-check (LDPC) [4,5] and turbo [6,7] codes have been studied. In this paper, our research goal is to reconstruct the synchronous scrambler, and we only use truncated soft decision sequences to accomplish the identi cation of feedback polynomials and initial states.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of a Synchronous Scrambler Based on Average Check Conformity

Tan¹,

Zhang²,

Zhong³

2022

Mathematical Problems in Engineering

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Channel coding technology is indispensable in digital communication systems. In noncooperative contexts, the identification of the channel codes of the synchronous scrambler is essential. In this paper, a new algorithm that directly uses a soft decision sequence for blind reconstruction of the synchronous scrambler is proposed. First, considering imbalanced signal sources and the principle of scrambling and descrambling the synchronous scrambler, the error-containing equation of the synchronous scrambler is established. Second, the average check conformity is introduced to complete the check relationship detection. Then, based on the statistical characteristics of the average check conformity, the corresponding discrimination threshold is established, and the reconstruction of the feedback polynomial of the synchronous scrambler is completed by traversing the possible primitive polynomials. Finally, the verification equation is determined by the method of subsection optimization, which greatly reduces the number of initial states that need to be traversed; this is critical for scramblers with high-order feedback polynomials (i.e., when the order of the feedback polynomial is greater than 15). Simulations show that the algorithm can effectively reconstruct the synchronous scrambler under imbalanced signal sources. Moreover, the proposed algorithm offers improved performance with about 1–2 dB gain at low signal-to-noise ratios compared with existing methods, and its computational complexity is reasonable.

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