scholarly journals Performance Comparison of Discrete Hartley Transform (DHT) and Fast Fourier Transform (FFT) OFDM System in AWGN Channel

2013 ◽  
Vol 70 (9) ◽  
pp. 1-4
Author(s):  
Vinay KumarSingh ◽  
Shilpi Gupta ◽  
Upena D. Dalal
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Performance Comparison ◽  
Ofdm System ◽  
Discrete Hartley Transform ◽  
Hartley Transform ◽  
Awgn Channel

scholarly journals Channel estimation of OFDM in C-band communication systems under different distribution conditions

2021 ◽  
Vol 23 (3) ◽  
pp. 1778
Author(s):  
Heba Abdul-Jaleel Al-Asady ◽  
Hassan Falah Fakhruldeen ◽  
Mustafa Qahtan Alsudani
Keyword(s):  
Fourier Transform ◽  
Channel Estimation ◽  
Fast Fourier Transform ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Ofdm System ◽  
High Data ◽  
High Efficient

<p>Orthogonal frequency division multiplexing (OFDM) is a transmission system that uses multiple orthogonal carriers that are sent out at the same time. OFDM is a technique for mobile and wireless communication that has high-efficient frequency utilization, high data-rate transmission, simple and efficient implementation using the fast Fourier transform (FFT) and the inverse fast Fourier transform (IFFT), and reduces inter symbol interference (ISI) by inserting cyclic prefix (CP). One of the most important approaches in an OFDM system is channel estimation. In this paper, the orthogonal frequency division multiplexing system with the Rayleigh channel module is analyzed for different areas. The proposed approach used large numbers of subcarriers to transmit the signals over 64-QAM modulation with pilot add channel estimation. The accuracy of the OFDM system is shown in the measuring of the relationships of peak power to the noise ratio and bit error rate.</p>

Experimental evaluation of the BER performance in optical OFDM system based on discrete Hartley transform precoding

2014 ◽  
Vol 10 (3) ◽  
pp. 224-227 ◽  
Author(s):  
Zhong-peng Wang ◽  
Fang-ni Chen ◽  
Ming-wei Wu ◽  
Ming Chen ◽  
Jin Tang ◽  
...  
Keyword(s):  
Experimental Evaluation ◽  
Ofdm System ◽  
Discrete Hartley Transform ◽  
Hartley Transform ◽  
Optical Ofdm ◽  
Ber Performance

A note on 2-D Hartley transform

Geophysics ◽  
1994 ◽  
Vol 59 (7) ◽  
pp. 1150-1155 ◽  
Author(s):  
N. L. Mohan ◽  
L. Anand Babu
Keyword(s):  
Signal Processing ◽  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Seismic Signal ◽  
Clear Definition ◽  
Hartley Transform ◽  
The Fourier Transform ◽  
Definition Of ◽  
Seismic Signal Processing

In recent years the application of the Hartley transform, originally introduced by Hartley (1942), has gained importance in seismic signal processing and interpretation (Saatcilar et al., 1990, 1992). The Hartley transform is similar to the Fourier transform but is computationally much faster than even the fast Fourier transform (Bracewell, 1983; Bracewell et al., 1986; Sorensen et al., 1985; Pei and Wu, 1985; Duhamel and Vetterli, 1987; Zhou, 1992). Surprisingly, we have not seen a clear definition of the 2-D Hartley transform in the published literature.

scholarly journals FFT based convolution

2010 ◽  
Author(s):  
Gaetan Lehmann
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Performance Comparison ◽  
Convolution Filter ◽  
The Fourier Transform ◽  
Large Kernel ◽  
A Performance

The Fourier transform of the convolution of two images is equal to the product of their Fourier transform. With this definition, it is possible to create a convolution filter based on the Fast Fourier Transform (FFT). The interesting complexity characteristics of this transform gives a very efficient convolution filter for large kernel images.This paper provides such a filter, as well as a detailed description of the implementation choices and a performance comparison with the “simple” itk::ConvolutionImageFilter.

scholarly journals Performance Comparison of Proposed Scheme Coded DWT-OFDM System with that of Conventional OFDM

2020 ◽  
Vol 19 ◽  
Keyword(s):  
Performance Comparison ◽  
Ofdm System ◽  
Matlab Software ◽  
Awgn Channel ◽  
Modulation Schemes ◽  
Better Than

In this paper, we have investigated the Proposed scheme coded DWT-OFDM system in comparison to conventional OFDM system over AWGN channel. 16, 32, 64 – QAM and PSK modulation schemes have been considered to evaluate the system. Moreover, two different wavelets have been used for examining the system. Simulations are performed using MATLAB software. It is found that proposed scheme based DWT-OFDM system performs better than conventional OFDM system under all the considered modulation schemes

Sign in / Sign up

Export Citation Format

Share Document