EXIT Chart Analysis of Higher Order Modulation Schemes in Molecular Communications

Bhattacharjee, Sunasheer; Damrath, Martin; Hoeher, Peter Adam

doi:10.1145/3345312.3345464

Cited by 7 publications

(9 citation statements)

References 15 publications

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“…EXIT chart analysis, proposed by Stephen ten Brink [35], promptly predicts the convergence behaviour of iteratively decoded systems. EXIT curves are based on mutual information exchange between the constituent decoders of iterative systems [36]. EXIT charts serve as a handy replacement to the cumbersome Monte Carlo based simulation, offering accurate results for attaining infinitesimal BER [37].…”

Section: Input Symbolsmentioning

confidence: 99%

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Performance Analysis of Iteratively Decoded Convergent Source Mapping with Sphere Packing‐Assisted Differential Space‐Time Spreading Technique for Efficient Video Transmission

et al. 2021

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With the substantial growth in number of wireless devices, future communication demands overarching research to design high-throughput and efficient systems. We propose an intelligent Convergent Source Mapping (CSM) approach incorporating Differential Space-Time Spreading (DSTS) technique with Sphere Packing (SP) modulation. The crux of CSM process is assured convergence by attaining an infinitesimal Bit-Error Rate (BER). Data Partitioning (DP) H.264 video codec is deployed to gauge the performance of our intelligent and efficient system. For the purpose of efficient and higher data rates, we have incorporated compression efficient source encoding along with error resiliency and transmission robustness features. The proposed system follows the concept of iterations between the Soft-Bit Source-Decoder (SBSD) and Recursive Systematic Convolutional (RSC) decoder. Simulations of the DSTS-SP-assisted CSM system are presented for the correlated narrowband Rayleigh channel, using different CSM rates but constant overall bit-rate budget. The SP-assisted DSTS systems are mainly useful in decoding algorithms that operate without requiring Channel State Information (CSI). The effects of incorporating redundancy via different CSM schemes on the attainable performance and convergence of the proposed system are investigated using EXtrinsic Information Transfer (EXIT) charts. The effectiveness of the proposed system is demonstrated through IT++ based proof-of-concept simulations. The Peak Signal-to-Noise Ratio (PSNR) analysis shows that using Rate-2/6 CSM with minimum Hamming distance ( d H , min ) of 4 offers about 5 dB gain, compared to an identical overall system code rate but with Rate-2/3 CSM and d H , min of 2. Furthermore, for a consistent value of d H , min and overall rate, the Rate-2/3 CSM scheme beats the Rate-5/6 CSM by about 2 dB at the PSNR degradation point of 2 dB. Moreover, the proposed system with Rate-2/3 CSM scheme furnishes an E b / N 0 gain of 20 dB when compared with the uniform-rate benchmarker. Clearly, we can say that higher d H , min and lower CSM values are favourable for our proposed setup.

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Section: Input Symbolsmentioning

confidence: 99%

“…CSM-coded symbols with d H, min and corresponding code rates of constituent encoders. , 5, 6, 0, 3, 5, 6, 9, 10, 12, 15, 0, 3, 5, 6, 9, 10, 12, 15, 17, 18, 20, 23, 24, 27, 29, 30, 0,3,5,6,9,10,12,15,17,18,20,23,24,27,29,30,33,34,36,39,40,43, 45, 46, 48, 51, 53, 54, 57, 58, 60, 63 …”

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confidence: 99%

Performance Analysis of Iteratively Decoded Convergent Source Mapping with Sphere Packing‐Assisted Differential Space‐Time Spreading Technique for Efficient Video Transmission

et al. 2021

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“…Researchers have invested great efforts in optimizing the performance of concatenated codes for the improvement of BER curves and approaching near-capacity performance. Further improvement in BER is attained by invoking the iterative decoding processing [38], which together with the turbo principle [39] is put into service for parallel concatenated [15,16,25] and serial concatenated [26,40,41] codes. The technique of iterative decoding of serially concatenated codes was capitalized upon by numerous investigators [9], such as in turbo equalization, coded modulation, multi-user detection, joint channel-estimation and data-detection plus synchronization in addition to the concept of joint sourcechannel decoding [42].…”

Section: Scc Encodermentioning

confidence: 99%

“…Stephen ten Brink proposed the employment of EXIT characteristics by examining the flow of input/output mutual information exchange between the component SISO decoders [52]. EXIT chart analysis serves as a powerful tool to predict the convergence behaviour of systems involving iterative exchange of information between the essential components [38,[53][54][55][56]. The main advantage associated with EXIT chart analysis is the ease with which it offers fast approach to predict convergence at infinitesimal BER values, avoiding the time consuming Monte-Carlo simulations for BER predictions [57].…”

Section: Exit Chart Analysismentioning

confidence: 99%

Analysis of Near-Capacity Iterative Decoding Schemes for Wireless Communication Using EXIT Charts

et al. 2020

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This article proposes and compares the performance of three flexible and bandwidth efficient transceivers. The terminology of Over-Complete Mapping (OCM) is introduced in the first two schemes. All of the schemes, namely Non-Convergent Serial Concatenated OCM Coding (NCSCOC), Convergent Serial Concatenated OCM Coding (CSCOC) and Self-Concatenated Convolutional Coding (SECCC); are simulated for the Rayleigh channel and employing iterative decoding to attain the refined output stream for feeding the video decoder. Specifically, the iterative decoding is beneficial in acquiring the convergence of EXtrinsic Information Transfer (EXIT) curves by repeatedly sharing of the mutual information. The difference between the NCSCOC and CSCOC schemes lies in the inner and outer rates. This change reflects an improvement in the Bit-Error Rate (BER) and improved EXIT convergence of CSCOC scheme, with reference to NCSCOC scheme. Results show that NCSCOC scheme never reaches the point of perfect convergence despite iterative decoding. However, CSCOC and SECCC schemes succeed in securing perfect convergence. Investigating the BER curves, it is deducible that SECCC is the most desirable transceiver system, having the least BER. Furthermore, it is plausible that the overall performance of SECCC is much better than the preceding schemes. Explicitly, our experimental results show that the proposed CSCOC scheme outperforms its identical code rate counterpart NCSCOC scheme by about 3 dB at the Peak Signalto-Noise Ratio (PSNR) degradation point of 1 dB. Additionally, an E b /N 0 gain of 20 dB is attained using SECCC scheme relative to identical code rate NCSCOC benchmarked scheme.

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“…• The transmission of infectious aerosols is suggested to be a multiuser MC scenario. • In each MC transmitter, the modulator is modeled by respiratory-event-driven higher order molecular variableconcentration shift keying [10]. • Channel modeling is aided by air-based experiments using a fluorescence dye in conjunction with optical detection, motivated by the macroscopic testbed for airbased MC published in [11].…”

Section: Introductionmentioning

confidence: 99%

Infectious Disease Transmission via Aerosol Propagation from a Molecular Communication Perspective: Shannon Meets Coronavirus

Schurwanz,

Hoeher,

Bhattacharjee

et al. 2020

Preprint

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Molecular communication is not just able to mimic biological and chemical communication mechanisms, but also provides a theoretical framework regarding viral infection processes. In this tutorial, aerosol and droplet transmission is modeled as a multiuser scenario with mobile nodes, related to broadcasting and relaying. In contrast to data communication systems, in the application of pathogen-laden aerosol transmission, mutual information between nodes should be minimized. Towards this goal, several countermeasures are reasoned. The findings are supported by experimental results and by an advanced particle simulation tool. This work is inspired by the recent outbreak of the coronavirus (COVID-19) pandemic, but also applicable to other air-borne infectious diseases like influenza.

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EXIT Chart Analysis of Higher Order Modulation Schemes in Molecular Communications

Cited by 7 publications

References 15 publications

Performance Analysis of Iteratively Decoded Convergent Source Mapping with Sphere Packing‐Assisted Differential Space‐Time Spreading Technique for Efficient Video Transmission

Performance Analysis of Iteratively Decoded Convergent Source Mapping with Sphere Packing‐Assisted Differential Space‐Time Spreading Technique for Efficient Video Transmission

Analysis of Near-Capacity Iterative Decoding Schemes for Wireless Communication Using EXIT Charts

Infectious Disease Transmission via Aerosol Propagation from a Molecular Communication Perspective: Shannon Meets Coronavirus

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