Dynamic Transmit Profile Selection in Dense Wireless Networks

Kułacz, Łukasz; Kliks, Adrian; Kryszkiewicz, Paweł; Bossy, Bartosz

doi:10.3390/s21010134

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…This is caused by many of its advantages, e.g., its high suitability for Multiple Input-Multiple Output (MIMO) schemes, simple equalization, and efficient implementation utilizing Fast Fourier Transform (FFT) module. Moreover, the multicarrier waveform can be easily adapted to various channel conditions or transmission requirements [ 2 ]. On the other hand, OFDM waveform is characterized by high variations of instantaneous power, measured typically by Peak to Average Power Ratio (PAPR) [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Efficiency Maximization for Battery-Powered OFDM Transmitter via Amplifier Operating Point Adjustment

Kryszkiewicz

2023

Sensors

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While Orthogonal Frequency Division Multiplexing (OFDM) is a dominating spectrum access technology in modern, wideband access networks, it is important to maximize its transmission efficiency considering the underlying radio front-end characteristics. A practical front-end contains nonlinear components, e.g., a Power Amplifier (PA), resulting in nonlinear distortion being injected into OFDM band deteriorating symbols detection. A PA operating point, defined here by Input Back-Off (IBO), can be adjusted to balance the wanted signal power and nonlinear distortion power. While it is the most common to maximize the spectral efficiency (SE), recently, energy efficiency (EE) maximization gained momentum. However, EE maximization requires, in addition to PA nonlinearity modeling, modeling of the power consumption of the PA and all other transmitter components. While it is commonly overlooked, if a battery is used to power the transmitter, its model should be considered as well. This paper derives mathematical expressions for EE and SE of an OFDM transmitter considering Rapp and soft-limiter models of PA nonlinearity, class A, class B, and perfect PA power consumption models, and two battery models: perfect and worst-case. While closed-form expressions cannot be obtained for most of the derived integrals, numerical methods have been used to obtain the optimal IBO value in each case. The numerical results show, in addition to optimal IBO values, the expected Signal-to-Noise and Distortion Ratios (SNDRs). It is shown that the optimal IBO value changes significantly with the wireless channel properties, utilized hardware architecture, or the utilized optimization goal. As such, the proposed optimization is an important topic for 5G and beyond transmitters.

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Section: Introductionmentioning

confidence: 99%

Efficiency Maximization for Battery-Powered OFDM Transmitter via Amplifier Operating Point Adjustment

Kryszkiewicz

2023

Sensors

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“…A network management system has as its activity the coordination and monitoring of the use of material resources, such as modems and routers, as well as logical resources, such as the protocols physically distributed in the network, reliability assurance, acceptable response times, and information security [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Paraconsistent Annotated Logic Algorithms Applied in Management and Control of Communication Network Routes

Filho

Abe

Marreiro

et al. 2021

Sensors

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This paper presents a computational method based on non-classical logic dedicated to routing management and information stream control in communication networks. Paraconsistent logic (PL) was used to create an algorithmic structure whose main property is to accept contradiction. Moreover, a computational structure, the denominated paraconsistent data analyzer (PDAPAL2v), was constructed to perform routing management in communication networks. Direct comparisons of PDAPAL2v with a classical logic system that simulates routing conditions were made in the laboratory. In the conventional system, the paraconsistent algorithms were considered as binary logic gates, and in the tests, the same adjustment limits of PDAPAL2v were applied. Using a database with controlled insertion of noise, we obtained an efficacy of 97% in the detection of deteriorated packets with PDAPAL2v and 72% with the conventional simulation system. Functional tests were carried out, showing that PDAPAL2v is able to assess the conditions and degradation of links and perform the analysis and correlation of various inputs and variables, even if the signals have contradictory values. From practical tests in the laboratory, the proposed method represents a new way of managing and controlling communication network routes with good performance.

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Dynamic Transmit Profile Selection in Dense Wireless Networks

Cited by 2 publications

References 15 publications

Efficiency Maximization for Battery-Powered OFDM Transmitter via Amplifier Operating Point Adjustment

Efficiency Maximization for Battery-Powered OFDM Transmitter via Amplifier Operating Point Adjustment

Paraconsistent Annotated Logic Algorithms Applied in Management and Control of Communication Network Routes

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