Performance enhancement of image transmission using UEP overlayed UTG_OFDM scheme

Salah, Moataz M.; Elrahman, Ashraf A.; Mokhtar, M.

doi:10.1109/nrsc.2008.4542364

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…A brief explanation of conventional OFDM scheme, model validation, and performance enhancement issues are also presented. The paper is organized as follows; Section II provides some background on conventional OFDM scheme modeling and system validation, Section III presents the proposed strategy of unequal power allocation to enhance the performance and then apply this model to unequal time guard OFDM model that are proposed in [3] in Section IV. Section V concludes the paper.…”

Section: /11mentioning

confidence: 99%

“…To validate the developed model, Figure 2 shows the simulation results, expressed in terms of symbol error rate (SER) versus SNR , of the system shown in figure 1 under the effect of AWGN and multipath flat fading channel with Rayleigh distribution. From the graph, it is shown that theoretical results [3,8] are compared to the simulation results for both AWGN and multipath channel.…”

Section: Orthogonal Frequency Division Multiplex Modeling and Valmentioning

confidence: 99%

“…Unequal time guard method (UTG) is proposed in [3]. It depends on applying a high value of guard time interval T g to the header part of the image, that exceeds the maximum excess delay, while the other part of the data file of the image can take a lower value from T g to increase the amount of information sent and decrease the wasting time due to large value of T g , under the requirements of detecting the image correctly with a good or at least a reasonable image quality.…”

Section: Application Of Unequal Power Allocation and Unequal Timementioning

confidence: 99%

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Unequal Power Allocation of Image Transmission in OFDM Systems

Salah

Elrahman

Elmoghazy

2009

International Conference on Aerospace Sciences and Aviation Tec

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The OFDM technique with cyclic time guard, which has been proposed for broadband communications, is an increasing approach to combat the frequency selectivity of the channel. In this paper, a modified OFDM scheme for image transmission is proposed. The new proposal is based on modification of the OFDM structure through using unequal power allocation for the successive OFDM symbols. Unequal cyclic time guard is also applied with unequal power allocation. The proposed method is compared with the conventional OFDM. Results show that the performance is improved at lower average cyclic extension periods and a lower average power when using the proposed method. The performance study of OFDM scheme is examined with and without forward error correction (FEC).

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Section: /11mentioning

confidence: 99%

Section: Orthogonal Frequency Division Multiplex Modeling and Valmentioning

confidence: 99%

Section: Application Of Unequal Power Allocation and Unequal Timementioning

confidence: 99%

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Unequal Power Allocation of Image Transmission in OFDM Systems

Salah

Elrahman

Elmoghazy

2009

International Conference on Aerospace Sciences and Aviation Tec

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“…The second step is made embedding some bitsnon overlapping blocks in its subsequent non overlapping blocks of the same video frame by algorithm of steganography. The algorithm of steganography cause decreasing in the size of file [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Compressed Watermarked Video Frame Transmission System Using Chaotic Interleaving

El-Bakary

El-Rabaie

Zahran

et al. 2015

International Conference on Aerospace Sciences and Aviation Tec

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In this paper, we propose a chaotic Baker interleaving approach for efficient spiht compressed steganography watermarked frame of transmission of video over (OFDM) wireless systems with equalization. Cases of Rayleigh fading channels and additive white Gaussian noise are considered. The spiht compressed steganography watermarked video frames is primarily converted to approach of chrominance and after that the chrominance approach is converted to a binary data format. Prior to the modulation step made interleaving on the binary data. The proposed chaotic interleaving approach made reducing in the channel effects on the data which it is transmitted and made adding a degree of encryption to the transmitted data. The big data of the video frames is reduced by madding spiht compressed technique. To test the performance of the proposed approach by the transmission of spiht compressed steganography watermarked video various frames over additive white Gaussian noise and Rayleigh fading channels with interleaving by chaotic baker map. The results of the experiments explain that the received compressed steganography watermarked video frames are gives higher peak signal to noise ratios (PSNRs) with applied chaotic interleaving compared with other approaches and also show the histogram count of the correlation coefficient of the watermarked blocks.

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