An Adaptive Hierarchical QAM Scheme for Enhanced Bandwidth and Power Utilization

Mukhtar, Husameldin; El-Tarhuni, Mohamed

doi:10.1109/tcomm.2012.061412.110507

Cited by 12 publications

(8 citation statements)

References 21 publications

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“…The work presents the hardware implementation of the technique and addresses the feasibility and hardware complexity as well. In [9], the authors have extended the condition for a Quadratic Permutation Polynomial (QPP) to be equivalent to an Almost Regular Permutation (ARP) interleaver, for Cubic Permutation Polynomial (CPP). It has been shown that the CPP interleavers are always equivalent to an ARP interleaver with disorder degree greater than one and smaller than the interleaver length, when the prime factorization of the interleaver length contains at least one prime number to a power higher than one and it fulfils the conditions for which there are true CPPs for the considered length.…”

Section: Introductionmentioning

confidence: 99%

“…Hierarchical Quadrature Amplitude Modulation (HQAM) allows for transmission with uneven level of priority when using constellations with nonuniform spacing. In [9], the authors have proposed an Adaptive HQAM (A-HQAM) mechanism with a regular adjustment of the ratios between the constellation spacing. This modification aims at increasing the transmission efficiency and is based on the channel quality.…”

Section: Introductionmentioning

confidence: 99%

“…The simulation results demonstrate that the proposed A-HQAM increases the transmission efficiency, and provides a reduced Peak to Average Power Ratio (PAPR). Additionally, the implementation of a practical A-HQAM is presented allowing the successful demodulation of the received signal with no knowledge of the varying transmission parameters [9]. In [10], an analysis of the performance of 16-QAM was done by applying an information theoretical approach.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Hybrid Binary and Non-Binary Turbo Decoding Schemes for LTE and DVB-RCS Standards

2019

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Binary and Non-Binary Turbo codes have been deployed in several digital communication standards to perform error correction. In order to enhance their error performance, several schemes such as Joint Source Channel Decoding (JSCD), extrinsic information scaling mechanisms, and prioritized QAM constellation mapping have been proposed for improving the error performance of error correcting codes. In this paper, hybrid schemes comprising of JSCD, regression based extrinsic information scaling, and prioritized 16-Quadrature Amplitude Modulation (QAM) with binary and non-binary Turbo codes have been presented. Significant improvement in error performance has been observed with the proposed scheme as compared to the conventional one. The hybrid scheme in the case of binary symmetric and asymmetric LTE Turbo codes, and triple binary Turbo codes outperform the conventional scheme by 0.8 dB on average. With duo-binary Turbo codes for the DVB-RCS standard, the hybrid scheme outperforms the conventional one with an average gain of 0.9 dB in BER performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance of Hybrid Binary and Non-Binary Turbo Decoding Schemes for LTE and DVB-RCS Standards

2019

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“…Hierarchical quadrature amplitude modulation (HQAM) allows for transmission with an uneven level of priority when using constellations with nonuniform spacing. In Reference the authors have proposed an adaptive HQAM (A‐HQAM) mechanism with a regular adjustment of the ratios between the constellation spacing. This modification aims at increasing the transmission efficiency and is based on the channel quality.…”

Section: Introductionmentioning

confidence: 99%

“…The simulation results demonstrate that the proposed A‐HQAM increases the transmission efficiency as well as provides a reduced peak to average power ratio (PAPR). Additionally, the implementation of a practical A‐HQAM is presented, allowing the successful demodulation of the received signal with no knowledge of the varying transmission parameters . In Reference an analysis of the performance of 16‐QAM is done by applying an information theoretical approach.…”

Section: Introductionmentioning

confidence: 99%

Performance of duo‐binary turbo codes with optimized hierarchical modulation

Beeharry

Fowdur

Soyjaudah

2018

Internet Technology Letters

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Non‐binary turbo codes (TCs) have become an important class of TCs following the adoption of duo‐binary TCs (DBTCs) in the digital video broadcasting with return channel via satellite (DVB‐RCS) standard. Several hierarchical modulation (HM) schemes for binary TCs have been proposed with a view to enhancing their performance. However, the existing techniques make use of fixed parameters throughout the Eb/N0 range and have not been applied to non‐binary TCs. In this paper, optimum parameters have been derived from exhaustive simulations for performing HM with 8‐PSK integrated with DBTCs. To validate the improved error performances obtained with the optimized parameters for HM, EXIT charts have been generated. Moreover, a model that could predict the optimized parameters at each Eb/N0 using K‐nearest neighbor (K‐NN)‐based binary classification has been derived from the results of exhaustive simulations. Significant improvement in error performances have been observed with the proposed scheme. For example, with a couple length of 48, code rate of 1/3 or 1/2, and 8‐PSK modulation, a significant average gain of 0.5 dB is obtained over conventional DBTCs without HM.

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Optimizing the Performance of Triple-Binary Turbo Codes with Hierarchical QAM and K-NN Based Classification

Beeharry

Fowdur

2019

Smart and Sustainable Engineering for Next Generation Applications

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An Adaptive Hierarchical QAM Scheme for Enhanced Bandwidth and Power Utilization

Cited by 12 publications

References 21 publications

Performance of Hybrid Binary and Non-Binary Turbo Decoding Schemes for LTE and DVB-RCS Standards

Performance of Hybrid Binary and Non-Binary Turbo Decoding Schemes for LTE and DVB-RCS Standards

Performance of duo‐binary turbo codes with optimized hierarchical modulation

Optimizing the Performance of Triple-Binary Turbo Codes with Hierarchical QAM and K-NN Based Classification

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