SSD‐enhanced uncoded space‐time labeling diversity

Quazi, Tahmid; Xu, Hongjun

doi:10.1002/dac.3592

Cited by 12 publications

(13 citation statements)

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“…The average BER performance of these mapper designs for 16QAM and 64QAM USTLD systems is shown in Figures and , respectively. Similar studies have been presented by Xu et al and Quazi et al; however, these works did not explain the reasons for the performance difference between the mapper designs.…”

Section: Resultssupporting

confidence: 64%

“…The theoretical results for the BER performance presented are obtained from the union bound given in . Due to the use of the union bound, the analytical expression is only expected to be accurate in the high SNR region as shown in previous works …”

Section: Resultsmentioning

confidence: 96%

“…The most common modulation scheme applied in many of the proposed labelling diversity systems, whether coded or uncoded, has been M‐ary Quadrature Amplitude Modulation (MQAM). However, it is well accepted that circular constellations are more suited for satellite links than square or rectangular ones.…”

Section: Introductionmentioning

confidence: 99%

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USTLD mapper design for APSK constellations over satellite links

Quazi

Patel

2019

Trans Emerging Tel Tech

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Space‐time block code (STBC)–based multiple‐input–multiple‐output techniques have been considered recently to enhance the performance of mobile satellite communication systems in terms of link reliability. Uncoded space‐time labelling diversity (USTLD) is a diversity technique that is a direct extension of the STBC system and further improves its performance. A USTLD system is proposed in this paper that is designed specifically for satellite to mobile station links. The circular M‐ary Amplitude Phase‐Shift Keying (MAPSK) constellation, which is adopted by the most recent satellite broadcasting standard Digital Video Broadcasting standard for nonlinear satellite links (DVB‐S2X), is applied to the USTLD system. The most critical aspect of developing a USTLD system is the design of the secondary mapper to achieve labelling diversity. Existing square M‐ary Quadrature Amplitude Modulation (MQAM) approaches to USTLD mapper design are adapted for appropriate 16APSK and 64APSK constellations from the DVB‐S2X standard. Various metrics are derived to quantitatively compare mapper designs for a Nakagami‐q fading channel. Theoretical results, verified by Monte Carlo simulations, show that the best of the MAPSK USTLD mappers considered achieve a gain of approximately 4 dB for 16APSK and 5 dB for 64APSK when compared to the Alamouti STBC system. Furthermore, a study is conducted to analytically compare USTLD mappers using the derived metrics for both MQAM and MAPSK. It is concluded that a two‐stage approach is the most accurate methodology for comparing USTLD mapper designs.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 96%

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USTLD mapper design for APSK constellations over satellite links

Quazi

Patel

2019

Trans Emerging Tel Tech

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“…Labeling diversity was recently proposed in another 1/2 rate STBC, uncoded space‐time labeling diversity (USTLD) . The USTLD technique has shown to be an efficient technique for improving the error performance of systems . The aim of this paper is to improve error performance of the S (3/4) ‐STBC with the aid of labeling diversity.…”

Section: Introductionmentioning

confidence: 99%

“…8 The USTLD technique has shown to be an efficient technique for improving the error performance of systems. [8][9][10] The aim of this paper is to improve error performance of the S (3/4) -STBC with the aid of labeling diversity. The labeling diversity will be applied to an S (3/4) To the authors' best knowledge, the analytical average bit error probability for the S (3/4) -STBC has not been formulated in any literature.…”

Section: Introductionmentioning

confidence: 99%

Improved error performance of a 3/4‐Sezginer space‐time block codes

Ramasila

2019

Int J Communication

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Summary The Alamouti space‐time block code (STBC) achieves full diversity gain at a rate of 1/2. However, the Alamouti scheme does not provide multiplexing gain. The Silver code offers both diversity and multiplexing gain. It has a minimum normalization determinant of 1false/7. The Golden code is another STBC that offers both diversity and multiplexing gain. The Golden code is ranked higher than the Silver code because of its lower minimum normalization determinant of 1false/5, however, the golden code suffers from a high detection complexity in the modulation order of M4. The 3/4‐Sezginer code is another STBC, which compromises between the Alamouti scheme and the Golden code in terms of diversity gain and multiplexing gain. The 3/4‐Sezginer code achieves full diversity and half of multiplexing gain. The uncoded space‐time labeling diversity (USTLD) is a recent scheme that improves the error performance when applied to the STBC in multiple‐input multiple‐output (MIMO) systems and will be applied to the 3/4‐Sezginer STBC to improve the error performance in this paper. The theoretical error probability for both the 3/4‐Sezginer STBC and the improved system is formulated using the union bound in this paper. The theoretical error probabilities of both 16‐QAM and 64‐QAM are validated through Monte Carlo simulation. The simulation and theoretical results show that the proposed system with 4 NR can achieve an SNR gain of 1 dB for 16‐QAM and 1.2 dB 64‐QAM at a bit error rate (BER) of 10−6.

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A multiple‐input, multiple‐output broadcasting system with space, time, polarization, and labeling diversity

Patel

Quazi

2022

Trans Emerging Tel Tech

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Enhancing the reliability of wireless links plays an important role in addressing the digital divide between under-developed and developed nations. Diversity techniques are used in wireless communication to improve link reliability. This article presents a broadcasting system that incorporates space, time, polarization and labeling diversity. The key challenge in incorporating labeling diversity into a system is the design of appropriate bit-to-symbol mappers. The latest technique to designing bit-to-symbol mappers is to use a genetic algorithm approach, which is applicable to any generic modulation scheme. This article presents a modified genetic algorithm mapper design algorithm based on recent advances in labeling diversity evaluation theory. The proposed system is studied under ideal (uncorrelated) conditions, as well as in the presence of inter-beam and inter-antenna inference (correlated conditions). Analytical expressions are presented to model both the correlated and uncorrelated systems, and are verified via Monte Carlo simulations. When compared to the best comparable scheme at a bit-error-rate of 10 −6 , results show that the proposed system improves performance by ≈7 dB for a 2 × 2 16APSK system configuration, and by ≈5 dB for both 2 × 4 32APSK and 2 × 2 64APSK system configurations.Results also show that the proposed system is highly sensitive to correlation at the transmitting node. In particular, transmit-side correlation degrades link reliability by 4 orders of magnitude for the 2 × 3 8APSK configuration studied at 25 dB.

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SSD‐enhanced uncoded space‐time labeling diversity

Cited by 12 publications

References 13 publications

USTLD mapper design for APSK constellations over satellite links

USTLD mapper design for APSK constellations over satellite links

Improved error performance of a 3/4‐Sezginer space‐time block codes

A multiple‐input, multiple‐output broadcasting system with space, time, polarization, and labeling diversity

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