نتایج جستجو برای: rician pdf

تعداد نتایج: 25392  

2013
Andrej Tkac

In this paper channel assignment in ad hoc network using by channel impulse response is described. The distribution of channel impulse response is appropriate for the estimation of two propagation components (LOS – Line-of-Sight, NLOS – NonLine-of-Sight). The Rician factor K, represents the type of distribution, namely LOS component has Rician distribution and NLOS component has Rayleigh distri...

Journal: :J. Signal and Information Processing 2011
Hikmat N. Abdullah Alejandro A. Valenzuela

In this paper, the performance evaluation of Frequency Modulated Chaotic On-Off Keying (FM-COOK) in AWGN, Rayleigh and Rician fading channels is given. The simulation results show that an improvement in BER can be gained by incorporating the FM modulation with COOK for SNR values less than 10 dB in AWGN case and less than 6 dB for Rayleigh and Rician fading channels.

2016
Mandeep Kaur Ravneet Kaur

------------------------------------------------------------------------------------------------------------------------------------------------------------Abstract Post inheritance denoising of magnetic resonance (MR) images is of emphatic for clinical diagnosis and computerized decisive test, such as tissue classification and segmentation. It has been exposed that when signal to noise ratio (...

2011
Ahmed Hussain Per-Simon Kildal Ulf Carlberg Jan Carlsson

It is often claimed that Rician fading must also be included for Over-The-Air (OTA) testing of mobile devices with Multiple-input Multiple-output (MIMO) capabilities. However, the Line-OfSight (LOS) component varies with orientation and location of the mobile device. Therefore, we study Rician channels with random LOS to determine its significance.

2017
Pranav Kumar Jha S Sushmitha Shree D. Sriram Kumar

The achievable rate of an opportunistic nonorthogonal multiple access (O-NOMA) based cooperative relaying system (CRS) with channel state information (CSI) available at the transmitter end is analyzed under Rician fading channels. O-NOMA-based CRS achieves better achievable rate than CNOMA-based CRS and results are verified through Monte Carlo simulations. Keywords—Non-orthogonal Multiple Acces...

2008
M. Descoteaux N. Wiest-Daesslé S. Prima C. Barillot R. Deriche C. Poupon

INTRODUCTION: To remove noise artifacts and enhance SNR, diffusion-weighted (DW) measurements are often repeated multiple times (NEX) along each gradient direction (typically, from 2 to 4 measurements) and each DW image is averaged. This averaging increases acquisition time considerably. It is also not clear what effects it has on the reconstructed diffusion profiles such as the orientation dis...

The true MR signal intensity extracted from noisy MR magnitude images is biased with the Rician noise caused by noise rectification in the magnitude calculation for low intensity pixels. This noise is more problematic when a quantitative analysis is performed based on the magnitude images with low SNR(<3.0). In such cases, the received signal for both the real and imaginary components will fluc...

2013
Gunjan Verma Jaspal Bagga

In this work, the performance of two equalizers Least Mean Square (LMS) and Recursive Least Square (RLS) is observed by calculating the BER effect of Rician channels over low Doppler shift. AWGN is also added to the channel from -10 dB to 20 dB. The Bit Error Rate (BER) of 2, 4, 8-PSK (Phase Shift Keying) signals and 16, 64QAM (Quadrature Amplitude Modulation) over Rayleigh and Rician channel i...

2017
Pranav Kumar Jha Sriram Kumar S Sushmitha Shree

The achievable rate of an Opportunistic NonOrthogonal Multiple Access (O-NOMA) based Cooperative Relaying System (CRS) with Channel State Information (CSI) available at the transmitter end is analyzed under Rician fading channels. It is shown that, O-NOMA-based CRS achieves a better achievable rate than Conventional-NOMA-based CRS and results are verified through Monte Carlo simulations. Keywor...

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