scholarly journals Performance Evaluation of a Concatenated FEC Scheme Based WiMAX System with Application to the Digital Image Transmission over White Guassian Noise and Fading Channels

2010 ◽  
Vol 9 (2) ◽  
pp. 62-66 ◽  
Author(s):  
Md. Zahid Hasa ◽  
Mohammad Reaz Hossa
Keyword(s):  
Performance Evaluation ◽  
Fading Channels ◽  
Digital Image ◽  
Image Transmission ◽  
Wimax System

scholarly journals Design of OFDM with interpolated FIR Filter channel estimation based Fixed WIMAX System for Data and Image Transmission

2019 ◽  
Vol 8 (4) ◽  
pp. 5305-5311
Keyword(s):  
Fading Channels ◽  
Orthogonal Frequency Division Multiplexing ◽  
Additive White Gaussian Noise ◽  
Image Transmission ◽  
Cyclic Prefix ◽  
Access Technology ◽  
Broadband Wireless ◽  
Simulink Model ◽  
Wimax System

The growth in the today’s wireless communication has lend the demand of highly quality of service (QoS) in transmission. The existing telecommunication industries are providing the transmission with the speed of Kbps to Mbps while most of the industries are failed to better QoS. The significant technique called Orthogonal Frequency Division Multiplexing (OFDM) provides the better QoS but leads to high Cyclic Prefix (CP). The WIMAX (Worldwide Interoperability for Microwave Access) is a broadband wireless access technology that adopts the OFDM. This paper introduces OFDM based WIMAX system performance analysis using CP. The Simulink model is designed with 16 Quadrature Amplitude Modulation (QAM) with CP using MATLAB. The QAM scheme was examined for Bit Error Rate (BER) over Additive White Gaussian Noise (AWGN) channel and multipath Rayleigh fading channel that is subjected to the CP. The proposed OFDM system proved to possess a better BER for without fading channels. The OFDM data/image transmission includes AWGN and Rayleigh with different cyclic prefix values1/4, 1/8 and 1/16 is plotted. The Cyclic prefix values are changing accordingly for transmitter and receiver. When Eb/No is 22db, the BER value 6.8e-5, 5.6e-5 and 5.8e-5 generated, for 1/4, 1/8 and 1/16 different cyclic prefix values respectively. Similarly, for image transmission proposed design achieves 19.94dB of PSNR value for SNR value of 7dB with respect to code rate ½ with 16-QAM

Digital image acquisition, processing, and analysis in a polymer microscopy laboratory

1994 ◽  
Vol 52 ◽  
pp. 454-455
Author(s):  
Vinod K. Berry ◽  
Xiao Zhang
Keyword(s):  
United States ◽  
Image Analysis ◽  
Digital Image ◽  
Image Acquisition ◽  
Image Transmission ◽  
The United States ◽  
Quantitative Image Analysis ◽  
Quantitative Image

In recent years it became apparent that we needed to improve productivity and efficiency in the Microscopy Laboratories in GE Plastics. It was realized that digital image acquisition, archiving, processing, analysis, and transmission over a network would be the best way to achieve this goal. Also, the capabilities of quantitative image analysis, image transmission etc. available with this approach would help us to increase our efficiency. Although the advantages of digital image acquisition, processing, archiving, etc. have been described and are being practiced in many SEM, laboratories, they have not been generally applied in microscopy laboratories (TEM, Optical, SEM and others) and impact on increased productivity has not been yet exploited as well.In order to attain our objective we have acquired a SEMICAPS imaging workstation for each of the GE Plastic sites in the United States. We have integrated the workstation with the microscopes and their peripherals as shown in Figure 1.

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