Estimation of nakagami-m fading channel parameters with application to optimized transmitter diversity systems

2003 ◽  
Vol 2 (2) ◽  
pp. 250-259 ◽  
Author(s):  
Young-Chai Ko ◽  
M.-S. Alouini
Keyword(s):  
Fading Channel ◽  
Transmitter Diversity ◽  
Channel Parameters ◽  
Diversity Systems

scholarly journals A Radon Slantlet Transforms Based OFDM System Design and Performance Simulation under Different Channel Conditions

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Abbas Hasan Kattoush
Keyword(s):  
Radon Transform ◽  
Spectral Efficiency ◽  
Fading Channel ◽  
Orthogonal Frequency Division Multiplexing ◽  
Additive White Gaussian Noise ◽  
Mapping Technique ◽  
Intercarrier Interference ◽  
Ofdm Systems ◽  
Ofdm System ◽  
Channel Parameters

Due to its good orthogonality, slantlet transform (SLT) is used in orthogonal frequency division multiplexing (OFDM) systems to reduce intersymbol interference (ISI) and intercarrier interference (ICI). This eliminates the need for cyclic prefix (CP) and increases the spectral efficiency of the design. Finite Radon transform (FRAT) mapper has the ability to increase orthogonality of subcarriers, is nonsensitive to channel parameters variations, and has a small constellation energy compared with conventional fast-Fourier-transform- (FFT-) based OFDM. It is also able to work as a good interleaver, which significantly reduces the bit error rate (BER). In this paper both FRAT mapping technique and SLT modulator are implemented in a new design of an OFDM system. The new structure was tested and compared with conventional FFT-based OFDM, Radon transform-based OFDM, and SLT-based OFDM for additive white Gaussian noise (AWGN) channel, flat fading channel (FFC), and multipath selective fading channel (SFC). Simulation tests were generated for different channel parameters values. The obtained results showed that the proposed system has increased the spectral efficiency, reduced ISI and ICI, and improved BER performance compared with other systems.

Mitigating the Effects of Intereference in a Multipath Prone Environment for a DVB-T Transmission

2015 ◽  
Vol 4 (2) ◽  
pp. 86
Author(s):  
Oluwaseun Yinka Alabi ◽  
Michael Kolawole
Keyword(s):  
Fading Channel ◽  
Rayleigh Fading ◽  
Simulation Method ◽  
Rayleigh Fading Channel ◽  
Channel Parameters ◽  
T System

This paper develops a novel simulation method that seeks to mitigate the effects of interference in a multipath prone environment for a DVB-T transmission by using the AWGN and the Multipath Rayleigh Fading Channel. The channel parameters were optimized until desired result was obtained. The reception performance of the DVB-T system shows that interference though not totally eliminated, can be minimized while transmitting in a multipath prone environment.

scholarly journals The Complex α-μ Fading Channel with OFDM Application

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Wander H. M. Freitas ◽  
Roberto C. D. V. Bomfin ◽  
Rausley A. A. de Souza ◽  
Michel Daoud Yacoub
Keyword(s):  
Monte Carlo Simulation ◽  
Bit Error Rate ◽  
System Performance ◽  
Fading Channel ◽  
Analytical Framework ◽  
Power Imbalance ◽  
Rate Performance ◽  
Ofdm System ◽  
Channel Parameters ◽  
General Method

The aims of this paper are threefold: (i) to present a model for the complex α-μ fading channel; (ii) to propose an efficient, simple, and general method to generate complex α-μ samples; (iii) to make use of this channel in order to assess the bit error rate performance of an OFDM system. An analytical framework is then used, whose output is validated through Monte Carlo simulation. Several important conclusions concerning the system performance as a function of the channel parameters, namely, nonlinearity, clustering, and power imbalance of in-phase and quadrature components, are drawn.

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