Results 21 to 30 of about 2,127,275 (322)
IEEE Access, 2020 In this paper, a software-defined radio (SDR) based transceiver system is designed and implemented on the system-on-chip (SoC) platform, which consists of a high-speed Arm embedded processor and a reconfigurable field-programmable gate array (FPGA).
Nishant Kumar +2 more
doaj +1 more source
A crosscorrelation predistorter using memory polynomials [PDF]
2004 IEEE International Symposium on Circuits and Systems (ISCAS), 2004 Amplification of signals with fluctuating envelopes inevitably leads to distortion because of non-linear behavior of the Power Amplifier (PA). Digital Predistortion can counteract these non-linear effects. In this paper, a novel Digital Predistortion architecture is presented which is based on the calculation of crosscorrelation functions using ...
openaire +1 more source
HiPPO: Recurrent Memory with Optimal Polynomial Projections
CoRR, 2020 A central problem in learning from sequential data is representing cumulative history in an incremental fashion as more data is processed. We introduce a general framework (HiPPO) for the online compression of continuous signals and discrete time series by projection onto polynomial bases. Given a measure that specifies the importance of each time step
Albert Gu +4 more
openaire +4 more sources
IEEE Access, 2019 The analog front of the direct conversion transmitter suffers from the effects of various unavoidable nonlinearities, such as local oscillator (LO) leakage, power amplifier (PA) nonlinearities, and in-phase and quadrature (I/Q) branch amplitude and phase
Yao Yao +4 more
doaj +1 more source
Polynomial Multiplication in NTRU Prime
Transactions on Cryptographic Hardware and Embedded Systems, 2020 This paper proposes two different methods to perform NTT-based polynomial multiplication in polynomial rings that do not naturally support such a multiplication. We demonstrate these methods on the NTRU Prime key-encapsulation mechanism (KEM) proposed by
Erdem Alkim +10 more
doaj +3 more sources
Carrier Aggregated Radio-Over-Fiber Downlink for Achieving 2Gbps for 5G Applications
IEEE Access, 2019 We demonstrate experimentally, for the first time, a distributed digital predistortion model for radio-over-fiber (RoF) downlink suitable for broadband 5G signals.
Mahmood Noweir +3 more
doaj +1 more source
RF-PA Modeling of PAPR: A Precomputed Approach to Reinforce Spectral Efficiency
IEEE Access, 2020 This paper introduces the measurement/modeling of a nonlinear RF power amplifier (PA) model extraction of spectral overlaps and peak-to-average power ratio (PAPR).
Jose Alejandro Galaviz-Aguilar +2 more
doaj +1 more source
Orthogonal Polynomial-Based Nonlinearity Modeling and Mitigation for LED Communications
IEEE Photonics Journal, 2016 The light-emitting diode (LED) is the major source of nonlinearity in LED communications, and the nonlinearity needs to be effectively modeled and thereby mitigated through predistortion or postdistortion to avoid degradation of communication performance.
Weikang Zhao +6 more
doaj +1 more source
Transmitter IQ Imbalance Mitigation and PA Linearization in Software Defined Radios [PDF]
Radioengineering, 2022 Radio frequency (RF) power amplifiers (PA) are efficiently linearized by adaptive digital predistortion (DPD). However, performance of DPD is severely degraded in presence of transmitter’s frequency-selective in-phase/quadrature (I/Q) imbalance.
B. Jovanovic, S. Milenkovic
doaj
Digital Predistortion of Wideband Signals with Reduced Complexity Based on Feedback Wiener System
Journal of Telecommunications and Information Technology, 2021 Digital predistortion (DPD) using baseband signals is commonly used for power amplifier linearization. This paper is devoted to this subject and aims to reduce DPD complexity.
Tayeb H. C. Bouazza +2 more
doaj +1 more source