Decision Region Optimization and Metric-Based Compensation of Memoryless Nonlinearity for APSK Systems

Yoda, Daiki; Ochiai, Hideki

doi:10.1109/tbc.2017.2781128

Cited by 14 publications

(8 citation statements)

References 32 publications

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“…This long-established scheme [30] has been used by optical [42] and satellite [43] communication systems. APSK constellation design comes with various degrees of freedom and there are different proposals for settling the details [38], [40], [44]- [46]. These nuances are however secondary, since any decent discretization of the optimal continuous distribution (for a certain SNR) will allow for a near-capacity rate.…”

Section: Implications For Ambient Bc Capacitymentioning

confidence: 99%

Load Modulation for Backscatter Communication: Channel Capacity and Capacity-Approaching Finite Constellations

Dumphart¹,

Sager²,

Wittneben³

2022

Preprint

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In backscatter communication (BC), a passive tag transmits information by just affecting an external electromagnetic field through load modulation. Thereby, the feed current of the excited tag antenna is modulated by adapting the passive termination load. This paper studies the achievable information rates with a freely adaptable passive load. As a prerequisite, we unify monostatic, bistatic, and ambient BC with circuit-based system modeling. A crucial insight is that channel capacity is described by existing results on peak-power-limited quadrature Gaussian channels, because the steady-state tag current phasor lies on a disk. Consequently, we derive the channel capacity in the case of an unmodulated external field, for a general passive or purely reactive or resistive tag load. We find that modulating both resistance and reactance is crucial for high rates. We discuss the capacity-achieving load statistics, the rate asymptotics, and the capacity of ambient BC in important special cases. Furthermore, we propose a capacity-approaching finite constellation design: a tailored amplitudeand-phase-shift keying on the reflection coefficient. We also demonstrate high rates for very simple loads of just a few switched resistors and capacitors. Finally, we investigate the rate loss from a valuerange-constrained load, which is found to be small for moderate constraints.

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Section: Implications For Ambient Bc Capacitymentioning

confidence: 99%

Load Modulation for Backscatter Communication: Channel Capacity and Capacity-Approaching Finite Constellations

Dumphart¹,

Sager²,

Wittneben³

2022

Preprint

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“…It is assumed that Ψ 0 , Ψ 1 , … , Ψ L−1 are mutually exclusive. Thus, the entire set of signal constellations can be expressed as Ψ= 15 For gray code, the radii of APSK rings r 𝓁 are arranged in an ascending order,…”

Section: Transmitter Modelmentioning

confidence: 99%

“…Constellation labeling designs for M-APSK schemes in coded and uncoded modulations have become an attractive research topic for digital broadcasting. [6][7][8][9][10][11][12][13][14][15][16] In this area, maximizing the MI between the channel input and output signals is a popular criterion. Based on MI criterion, both the radii and phases of each concentric circle as well as the number of points on each circle can be optimized for high capacity error performance and robustness to phase noise.…”

Section: Introductionmentioning

confidence: 99%

“…5 The impact of nonlinear distortion in the framework of single-carrier signal has been investigated and a new modeling approach for its compensation proposed in uncoded and coded modulation. 15 For coded modulation, recently developed metrics that can be adjusted to the statistical characteristics of nonlinear channel distortion was proposed. For uncoded modulation, optimal decision region as well as suboptimal ones that may exhibit error performance gains close to the optimal in the case of low SNR was equally developed.…”

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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“…The other empirical models, such as Cann and Rapp models consist of fewer coefficients, but the mathematical functions of these models are more complicated than the Taylor model. The Saleh model is a popular behavioural approach widely used for predicting nonlinear distortion and modelling DPDs in wireless communications [4–11].…”

Section: Introductionmentioning

confidence: 99%

Improved estimation for Saleh model and predistortion of power amplifiers using 1‐dB compression point

Al-kanan

Yang

2019

J. eng.

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Decision Region Optimization and Metric-Based Compensation of Memoryless Nonlinearity for APSK Systems

Cited by 14 publications

References 32 publications

Load Modulation for Backscatter Communication: Channel Capacity and Capacity-Approaching Finite Constellations

Load Modulation for Backscatter Communication: Channel Capacity and Capacity-Approaching Finite Constellations

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

Improved estimation for Saleh model and predistortion of power amplifiers using 1‐dB compression point

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