USTLD mapper design for APSK constellations over satellite links

Quazi, Tahmid; Patel, Sulaiman Saleem

doi:10.1002/ett.3586

Cited by 9 publications

(46 citation statements)

References 34 publications

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“…The study also presents simulation results for error performance comparison of the proposed A-USTLD with the existing two transmit antennas APSK-based USTLD scheme. 33 It is to be noted that only 16-APSK and 64-APSK simulation results are considered as standards for DVB-S2X in the existing two transmit antennas APSK USTLD scheme.…”

Section: Resultsmentioning

confidence: 99%

“…The adaptation of MIMO USTLD scheme for digital broadcasting system using APSK transmission model has just been introduced in the literature for two transmit USTLD system in worst case Nakagami-q fading channels. 33 Motivated by the aforementioned work, the main focus of this study is to propose three transmit USTLD system in order to further improve link reliability of the digital broadcasting system for the same bandwidth efficiency and robustness in the presence of noise and multipath fading channels compared to the existing scheme. 33 Moreover, the choice of Rician fading channels stems from the fact that it has attracted interest in digital broadcast channels in the recent time for transmission of line-of-sight (LOS) components.…”

Section: Motivation and Contributionsmentioning

confidence: 99%

“…33 Motivated by the aforementioned work, the main focus of this study is to propose three transmit USTLD system in order to further improve link reliability of the digital broadcasting system for the same bandwidth efficiency and robustness in the presence of noise and multipath fading channels compared to the existing scheme. 33 Moreover, the choice of Rician fading channels stems from the fact that it has attracted interest in digital broadcast channels in the recent time for transmission of line-of-sight (LOS) components. [35][36][37] Hence, the original contributions of this study are summarized as follows:…”

Section: Motivation and Contributionsmentioning

confidence: 99%

“…In this subsection, three transmit antennas A-USTLD scheme is compared with the existing two transmit antennas APSK-based USTLD schemes. 33 For simplicity of explanation, the modulation order of 16-APSK and 64-APSK with concentric rings combination 4+12APSK and 4+12+20+28APSK are compared, respectively, as shown in Figure 6. For 16-APSK, the proposed A-USTLD exhibits SNR gain of 1.2 dB gain over 2 × N R APSK-based USTLD at a BER of 10 −6 .…”

Section: Ber Comparison For Rate One With Existing Apsk Ustld N T =mentioning

confidence: 99%

“…A new mapper design using heuristic algorithm for USTLD in Nakagami-q fading channel has been proposed for APSK digital broadcasting. 33 The study derived a set of possible metrics based on MED for evaluating mappers design in two transmit antennas USTLD scheme. In addition, Patel et al 34 proposed a new genetic algorithm for two transmit USTLD that is applicable to M-QAM, M-ary Phase Shift Keying (M-PSK), and M-APSK.…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of M‐ary amplitude and phase shift keying uncoded space‐time labeling diversity with three transmit antennas in nonlinear Rician channels

Ayanda

2021

Trans Emerging Tel Tech

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This article investigates uncoded space-time labeling diversity (USTLD) with three transmit antennas schemes based on amplitude and phase shift keying (APSK) modulation. The proposed USTLD schemes are DVB-S2 and DVB-S2X standards compatible and provide robustness against nonlinear distortion for both Rician frequency-flat fast and quasi-static fading channels. Numerical analysis of the proposed schemes is derived based on pairwise error probability. The analytical results are validated by Monte Carlo simulations, which convergeaccurately at high signal-to-noise ratio. Furthermore, by adapting constellation structure between square quadratic amplitude modulations and concentric rings of APSK modulations, the author proposes mapper design for 16-APSK, 32-APSK, and 64-APSK modulations for USTLD using heuristic algorithm. Finally, the proposed USTLD schemes show bit error rate (BER) improvement over the existing two transmit USTLD scheme with error performance gain of 1.2 and 2.8 dB at a BER of 10 −6 for 16-APSK and 64-APSK USTLD scheme, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Motivation and Contributionsmentioning

confidence: 99%

Section: Motivation and Contributionsmentioning

confidence: 99%

Section: Ber Comparison For Rate One With Existing Apsk Ustld N T =mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance analysis of M‐ary amplitude and phase shift keying uncoded space‐time labeling diversity with three transmit antennas in nonlinear Rician channels

Ayanda

2021

Trans Emerging Tel Tech

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High‐rate uncoded space‐time labelling diversity with low‐complexity detection

Patel¹,

Quazi

2020

Int J Communication

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SummaryUncoded space‐time labelling diversity (USTLD) is a recent scheme that improved the error performance compared to conventional multiple‐input, multiple‐output systems. Thus far, USTLD has suffered from limited achievable data rates, as the original model uses only two transmit antennas. This motivates for the work in this paper, where the USTLD model is extended to allow for any desired number of transmit antennas. An analytical bound for the average bit error probability of this high‐rate USTLD (HR‐USTLD) system is derived. This expression is verified using the results of Monte Carlo simulations, which show a tight fit in the high signal‐to‐noise ratio region. The increased data rates associated with larger transmit antenna arrays in HR‐USTLD systems come at the cost of increased detection complexity. Therefore, this paper studies the application of low‐complexity detection algorithms based on the popular QR decomposition technique and proposes a new algorithm specifically designed for HR‐USTLD systems. Analysis of this algorithm in terms of accuracy and computational complexity is also provided and benchmarked against maximum‐likelihood detection (MLD). It is shown that the proposed algorithm achieves near‐MLD accuracy, while reducing complexity by 79.75% and 92.53% for the respective 4 × 4 16QAM and 4 × 5 16PSK HR‐USTLD systems investigated.

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An ordered crossover based approach to designing labeling diversity mappers

Solwa

2021

Trans Emerging Tel Tech

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Genetic algorithms (GAs) are population‐based search optimization techniques that mimic the process of evolution and natural selection. GAs are an effective way of finding feasible solutions to complex problems. Recently, GAs were applied to the labeling diversity (LD) problem that produced local optimal mappers for M‐QAM, M‐PSK, and M‐APSK constellations. However, the GA did not implement biological processes during the mating process; hence it could not be classified as a GA, but rather a genetic‐inspired algorithm (GIA). In this article, we investigate the application of six distinct crossover techniques to further improve the GIAs ability to produce more closer‐to‐optimal mapper designs. By using biological crossover techniques, offspring produced acquires genetic diversity from parent chromosomes. Single parent crossover techniques do not produce diversified offspring, thus diversity being acquired only by mutation. The Davis ordered crossover (OX1) was chosen as a suitable technique to be applied to the proposed GA. The proposed GA was tested on 16QAM, 16PSK, 16APSK, and three 16APSK constellations that do not exhibit diagonal symmetry. In the case of the 16QAM and 16PSK constellations, the proposed GA matched but did not improve upon existing mapper designs. In the case of the 16APSK and 11+5APSK constellations, the proposed GA produced mapper designs exhibited diversity gains of ≈0.5 dB over the existing GIA mapper designs at the BER of 10−6. The asymmetric 16APSK and single symmetry 16APSK constellations exhibited diversity gains of ≈4 and ≈2 dB over existing GIA mapper designs at the BER of 10−3 and 10−5. More significantly, the proposed GA achieved a significant improvement in time complexity. However, the proposed GA was shown to have higher computational complexity of O(M!) over the GIA with a complexity of O(M2). Mutation rate studies have shown that for single‐parent crossover techniques, higher mutation rates are needed, thus making the process is purely random. In the case of the two‐parent crossover technique, randomness is reduced and genetic diversity is increased, hence lower mutation rates were required due to a more guided search.

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USTLD mapper design for APSK constellations over satellite links

Cited by 9 publications

References 34 publications

Performance analysis of M‐ary amplitude and phase shift keying uncoded space‐time labeling diversity with three transmit antennas in nonlinear Rician channels

Performance analysis of M‐ary amplitude and phase shift keying uncoded space‐time labeling diversity with three transmit antennas in nonlinear Rician channels

High‐rate uncoded space‐time labelling diversity with low‐complexity detection

An ordered crossover based approach to designing labeling diversity mappers

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