Predicting spectral regrowth of nonlinear power amplifiers

Zhou, G.T.; Kenney, J.S.

doi:10.1109/tcomm.2002.1006553

Cited by 81 publications

(41 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other contributions [12,13] used the results presented in [11] to study the effect of HPA on multiple-input multiple-output (MIMO) transmit diversity systems. The impact of the HPA on out-of-band spectral regrowth was also studied for the OFDM system [14] as well as the FBMC/OQAM case [9,15].…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of BER performance of nonlinearly amplified FBMC/OQAM and OFDM signals

Bouhadda

Shaïek

Roviras

et al. 2014

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

In this paper, we introduce an analytical study of the impact of high-power amplifier (HPA) nonlinear distortion (NLD) on the bit error rate (BER) of multicarrier techniques. Two schemes of multicarrier modulations are considered in this work: the classical orthogonal frequency division multiplexing (OFDM) and the filter bank-based multicarrier using offset quadrature amplitude modulation (FBMC/OQAM), including different HPA models. According to Bussgang's theorem, the in-band NLD is modeled as a complex gain in addition to an independent noise term for a Gaussian input signal. The BER performance of OFDM and FBMC/OQAM modulations, transmitting over additive white Gaussian noise (AWGN) and Rayleigh fading channels, is theoretically investigated and compared to simulation results. For simple HPA models, such as the soft envelope limiter, it is easy to compute the BER theoretical expression. However, for other HPA models or for real measured HPA, BER derivation is generally intractable. In this paper, we propose a general method based on a polynomial fitting of the HPA characteristics and we give theoretical expressions for the BER for any HPA model.

show abstract

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of BER performance of nonlinearly amplified FBMC/OQAM and OFDM signals

Bouhadda

Shaïek

Roviras

et al. 2014

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

show abstract

“…(10), which is PSD of z m (t), can be calculated with a sum of multiple convolution of an input complex envelope PSD S x m x m (f ). The method is suggested in the several literatures [4,5,6]. As shown in (10), the PSD ofx n (t) can be described with the weighted sum of the frequency shifted function of S Z m Z m (f ).…”

Section: Power Spectral Density Analysismentioning

confidence: 99%

“…The theoretical PSD is obtained using Eq. (10) and the scheme in [6]. The extracted PSD (dashed line) for each receiver is compared with the simulated PSD (solid line) in Fig.…”

Section: Simulation Examplesmentioning

confidence: 99%

“…Therefore, it is important to analyze the spectral characteristics and EVM degradation including interactive nonlinear problem for both analysis and design of cognitive radio system. Several works on theoretical analysis of power spectral density (PSD) have been carried out by other researchers [4,5,6], but only focus on the PA nonlinearity in one transmitter. In this paper, we study interactive nonlinear problem in cognitive radio system, suggest a new model that includes interactive nonlinear problem in multi-user environment, and extract PSD analytically in the receiver side.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and analysis of cognitive radio system considering interactive nonlinear problem

2008

IEICE Electron. Express

View full text Add to dashboard Cite

Abstract:In this paper, we consider interactive nonlinear problem of multiple users in cognitive radio system. A new model that represents a cognitive radio system with N pairs of nonlinear transmitters and receivers is suggested. The model is represented with a baseband equivalent multi-input system based on complex Taylor series and weight functions. The power spectral density (PSD) of the received signal is analytically extracted using the autocorrelation function of the model output. The error vector magnitude (EVM) degradation due to interactive nonlinear problem is also analyzed. The spectral and EVM degradation analysis are verified by comparing the analytical results with the simulated ones. Keywords: cognitive radio system, Error Vector Magnitude (EVM), nonlinear, Power Spectral Density (PSD) Classification: Microwave and millimeter wave devices, circuits, and systems References[1] J. Mitola III and G. Q. Maguire, "Cognitive radio: making software radios more personal," IEEE Pers.

show abstract

“…the amount of spectral regrowth is within limits [4]. This is due to the fact that channel impairments like the intermodulation distortion can be readily estimated with the knowledge of the nonlinear characteristics of the power amplifier, and properly modeled it [5].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Intermodulation Rejection Value as a Function of Frequency in Power Amplifier Using AM-AM and AM-PM Diagrams Based on Power Series Analysis

Kashi

Kamarei²,

Javadi³

2012

View full text Add to dashboard Cite

A method to predict intermodulation (IM) products of two tone test based on Amplitude to amplitude (AM-AM) and amplitude to phase (AM-PM) diagrams of power amplifier is proposed in this paper. An RF power amplifier is mathematically modeled by a power series in order of 13. Coefficients of the transfer function are obtained by odd-order polynomial fitting of the transfer function of the power amplifier that is modeled by power series, with AM-AM and AM-PM diagrams. Because of considering AM-PM distortion, coefficients have become complex. By using this transfer function, analytical expressions of IM products are derived. Frequency effect of IM products are modeled in suggested method to estimate the effects of changing in input frequency on output. With the mean of this factor the model is able to predict IM products of wideband frequency input. Simulated results agree well with the predicted method in comparisons.

show abstract

Predicting spectral regrowth of nonlinear power amplifiers

Cited by 81 publications

References 5 publications

Theoretical analysis of BER performance of nonlinearly amplified FBMC/OQAM and OFDM signals

Theoretical analysis of BER performance of nonlinearly amplified FBMC/OQAM and OFDM signals

Modeling and analysis of cognitive radio system considering interactive nonlinear problem

Estimation of Intermodulation Rejection Value as a Function of Frequency in Power Amplifier Using AM-AM and AM-PM Diagrams Based on Power Series Analysis

Contact Info

Product

Resources

About