Free-Space Optical Communication: A Diversity-Multiplexing Tradeoff Perspective

Jaiswal, Anshul; Bhatnagar, Manav R.

doi:10.1109/tit.2018.2856116

Cited by 32 publications

(23 citation statements)

References 33 publications

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“…It implies that as

\overset{false¯}{γ}

increases, diversity of the { i,j } link does not saturate but keeps on increasing. This interpretation is in compliance with [45, 46] where it has been proved that asymptotic maximum diversity gain for a log‐normal channel is infinite. Thus, asymptotic plot for a

{BER}_{i, j}

for any given value of M or N would be a line parallel to the y ‐axis at some finite value of

\overset{false¯}{γ}

.…”

Section: Diversity Analysis and Computational Complexitysupporting

confidence: 83%

Performance analysis of multi‐hop multi‐branch frequency‐selective channel for DF relaying

Rawat

Lall

2019

IET Communications

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“…It implies that as

\overset{false¯}{γ}

{BER}_{i, j}

for any given value of M or N would be a line parallel to the y ‐axis at some finite value of

\overset{false¯}{γ}

.…”

Section: Diversity Analysis and Computational Complexitysupporting

confidence: 83%

Performance analysis of multi‐hop multi‐branch frequency‐selective channel for DF relaying

Rawat

Lall

2019

IET Communications

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“…For the MIMO FSO link, the outage diversity order under the ΓΓ channel is given as ( [25] [Equation (47)])…”

Section: Diversity-multiplexing Tradeoff Analysismentioning

confidence: 99%

Unified Performance Analysis of MIMO Mixed RF/FSO Relaying System

Liang

Miao

et al. 2021

Applied Sciences

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This paper investigates the asymmetric dual–hop multiple input multiple output (MIMO) mixed radio frequency (RF)/free space optical (FSO) decode–and–forward (DF) relaying system. This kind of system can utilize two different fading characteristic channels to reduce the possibility of the system falling into deep fading. In addition, each link of the system adopts MIMO technology to mitigate the disadvantages of fading. In this paper, the closed form expressions of the outage probability, bit error rate (BER) and average ergodic capacity are derived. The approximate expression of the system outage probability considering the pointing error is also derived. Additionally, asymptotic performance for diversity order and diversity–multiplexing tradeoff (DMT) of the system is analyzed and discussed, which provides direct theoretical basis for practical engineering design.

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“…However, the channel model considered in [20] is valid only for weak AT regime of FSO systems. To overcome this problem, a study of optimal DMT for intensity modulation direct detection (IM/DD) MIMO-FSO system is done in [21] covering all the ranges of Outage error probability inf Infimum of a set Υ i Back-off multiplexing gain AT. However, in the open literature, no CSIT-dependent power controller strategy using limited quantized feedback has been adopted to derive the optimal DMT of MIMO-FSO system.…”

Section: A Motivationmentioning

confidence: 99%

“…Proof : J 1 (r, q), J 2 (r, q) and J 3 (r, q) are derived in [21]. Further, on substituting (15) into ( 14), and applying eigenvalue decomposition of HH T , we get…”

Section: A Single-rate Transmissionmentioning

confidence: 99%

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Diversity-Multiplexing Tradeoff for MIMO-FSO System Under Different Transmission Scenarios With Limited Quantized Feedback

Sharda

Bhatnagar

2020

IEEE Access

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The diversity-multiplexing tradeoff (DMT) in a multiple-input multiple-output (MIMO) free-space optical (FSO) communication with limited channel state information at the transmitter (CSIT) is investigated. Using the limited CSIT based power and rate control strategy, we optimally allocate the power among the good and bad channels in such a fashion that the DMT performance of the system enhances significantly unlike the no-CSIT based MIMO-FSO DMT. In this way, a new limited CSIT based technique/model with optimal power and rate control strategy is proposed to enhance the DMT performance. The optimal DMT is studied for two different transmission scenarios: single-rate and adaptive-rate transmission. It is shown that how the optimal DMT is influenced when the concept of minimum guaranteed multiplexing gain in the forward link is taken into account. It is illustrated that power control based on the feedback plays a vital role in attaining the optimal DMT, and rate adaptation is significant in obtaining a high diversity gain, especially at high rates. Moreover, the analysis of upper and lower bounds on the optimal DMT is done by giving useful insights. Furthermore, a novel study based on the optimal tradeoff between the degrees of freedom and the number of transmit apertures in a coherent MIMO-FSO channel is also done. To validate the results of the proposed model, we compare the derived results with the no-CSIT based MIMO-FSO DMT. It is observed that the proposed technique/model outperforms the no-CSIT based MIMO-FSO DMT.INDEX TERMS Adaptive-rate, diversity-multiplexing tradeoff (DMT), free-space optical (FSO) communication, gamma-gamma channel, log-normal channel, multiple-input multiple-output (MIMO), negative exponential channel, single-rate.

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Free-Space Optical Communication: A Diversity-Multiplexing Tradeoff Perspective

Cited by 32 publications

References 33 publications

Performance analysis of multi‐hop multi‐branch frequency‐selective channel for DF relaying

Performance analysis of multi‐hop multi‐branch frequency‐selective channel for DF relaying

Unified Performance Analysis of MIMO Mixed RF/FSO Relaying System

Diversity-Multiplexing Tradeoff for MIMO-FSO System Under Different Transmission Scenarios With Limited Quantized Feedback

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