Nonlinear channel

Radio over Fiber (RoF) stands as a cuttingedge technology poised to revolutionize emerging wireless networks, especially in the context of fifth-generation Cloud-Radio Access Networks (C-RAN). Concurrently, with the pervasive integration of deep learning across diverse domains such as communication and data processing, this investigation delves into the nonlinear effects observed in a fronthaul interface.

6p vithomson 02-07-2024 0 0   Download

In this work, we numerically study how various input beam profiles influence the linear and nonlinear light propagation at the interface of two-dimensional (2D) binary waveguide arrays. It is revealed that, due to the presence of the central homogeneous interfaced waveguides, light beams are effectively steered into the preferred direction.

7p visybill 22-03-2023 3 2   Download

A Twin Rotor MIMO System (TRMS) is an aerodynamic experimental system with high nonlinearity which includes two inputs, two outputs, and six states. In this paper we will present the results from the application of Model Predictive Control (MPC) for TRMS based on its mathematical model we have built recently.

4p vilexus 05-10-2022 8 4   Download

This paper introduces the expectation maximization (EM)-based channel estimation for the high power amplifier (HPA)-incurred nonlinear orthogonal frequency division multiplexing (OFDM) systems based on the linearization using extended Bussgang decomposition

13p vibentley 08-09-2022 16 4   Download

In this paper, a low-complexity linear group precoding algorithm in the exponential correlation channel model is proposed for massive MIMO systems. The proposed precoder consists of two components: The first one minimizes the interferences among neighboring user groups; The second one improves the system performance by utilizing the ELR-SLB technique.

16p cothumenhmong11 05-05-2021 17 1   Download

In previous articles, we proposed single kernel and multikernel equalizers for nonlinear satellite channels with significant improvements in performance. The results demonstrated that the advantages of kernel equalizers over radius basis function neural equalizers are the ability to achieve overall convergence, which results in smaller output errors.

5p vishizuka2711 07-04-2020 17 3   Download

Efficient mitigation of power amplifier (PA) nonlinear distortion in hybrid precoding based broadband mmWave systems is an open research problem. In this article, we first carry out detailed signal and distortion modeling in broadband multi-user hybrid MIMO systems with a bank of nonlinear PAs in each subarray. Building on the derived models, we then propose a novel digital predistortion (DPD) solution that requires only a single DPD unit per transmit chain or subarray.

13p son248 24-03-2020 13 1   Download

The combination of the kernel trick and the least-mean-square (LMS) algorithm provides an interesting sample by sample update for an adaptive equalizer in reproducing Kernel Hilbert Spaces (RKHS), which is named here the KLMS. This paper shows that in the finite training data case, the KLMS algorithm is well-posed in RKHS without the addition of an extra regularization term to penalize solution norms.

4p sabiendo 06-02-2020 12 0   Download

This paper proposes a new approach to combine the convex of two single-kernel adaptive equalizers with different convergent rates and different efficiencies in order to get the best kernel equalizer. This is the Gaussian multikernel equalizer.

5p vititan2711 13-08-2019 7 0   Download

This paper investigates performance degradation of conventional Orthogonal Frequency Division Multiplexing (OFDM) and Discrete Wavelet Transform based OFDM (DWT-OFDM) systems when the signals are passed through a nonlinear High Power Amplifier (HPA) and fading channel. In the case of DWT-OFDM, several wavelets such as Daubechies, Symlet and Biorthogonal are evaluated.

8p girlsseek 27-02-2019 28 1   Download

A linear-like discrete-time fuzzy controller was designed to control and stabilize a single-pool irrigation canal. Saint Venant equations for open-channel flow were linearized using the Taylor series and a finite-difference approximation of the original nonlinear partial differential equations.

14p masterbarista 15-01-2019 23 1   Download

Corresponding to the domestic needs in development of nuclear instruments, this work presents a design and construction of an ADC8K module with successive approximation method. Some experimental results are as follows: Differential nonlinearity (DNL%) = 1.42, integral non-linearity (INL% = 0.58) and χ2 = 8.109 proved that mentioned system can be used with considerable reliability in practical nuclear engineering.

13p danhvi10 22-11-2018 37 1   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: An Implementation of Nonlinear Multiuser Detection in Rayleigh Fading Channel

9p sting11 09-03-2012 43 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Bit Error Rate Analysis for an OFDM System with Channel Estimation in a Nonlinear and Frequency-Selective Fading Channel

12p sting05 09-02-2012 58 5   Download

Nonlinear Amplification of Synchronous CDMA Overview As we have described in Chapter 3, the SS/CDMA uses orthogonal CDMA for both uplink and downlink transmission. On board the satellite, each CDMA channel is routed to a destination downlink beam by the Code Division Switch (CDS). All channels in the same output port of the CDS are combined and then amplified with a Traveling Wave Tube (TWT) amplifier for downlink transmission.

27p doroxon 16-08-2010 121 12   Download

Neural Network Based Equalization In this chapter, we will give an overview of neural network based equalization. Channel equalization can be viewed as a classification problem. The optimal solution to this classification problem is inherentlynonlinear.

85p doroxon 16-08-2010 102 9   Download

Multichannel Systems In principle, the capacity of optical communication systems can exceed 10 Tb/s because of a large frequency associated with the optical carrier. In practice, however, the bit rate was limited to 10 Gb/s or less until 1995 because of the limitations imposed by the dispersive and nonlinear effects and by the speed of electronic components. Since then, transmission of multiple optical channels over the same fiber has provided a simple way for extending the system capacity to beyond 1 Tb/s.

74p khinhkha 29-07-2010 71 5   Download