An embedded transmission scheme using ppm signaling with symmetric error-correcting codes for optical CDMA

In this work, the effect of the 2-D Optical Orthogonal Spatial Pattern Codes (OOSPC) is evaluated quantitatively for the transmission of medical images over Multi-core optical fiber using a double blind CDMA technology. The implemented method assumes that P medical practitioners or users are working simultaneously and transmitting images from one site to another. The transmitted images are encoded using a two-steps procedure: 1) coding the pixels (users) using a particular OOSPC and 2) coding the bits using time orthogonal basis functions. The encoding procedure follows the decomposition of an image into its bits to increase the transmission rate by performing a parallel transmission. Then, the encoded information from different images is combined using a multiplexer and is transmitted over the multi-core optical fiber. The transmitted information is de-multiplexed at the receiver side to identify the user that is transmitting the information and consequently, to reconstruct the original image i.e. is decoded using the same double blind Orthogonal Signatures. The performance is quantitatively evaluated using Monte-Carlo simulation techniques using different criteria, namely, the Performance Test, The Bit Error Rate, the Root Mean Square Error and the Pixel Error Rate.

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“…al. , 1996;Kamakura et. al., 2003] have used a spatial CDMA approach which in turn ensures a fast transmission.…”

Section: Introductionmentioning

confidence: 99%

Transmission of Medical Images over Multi-Core Optical Fiber using CDMA: Effect of Spatial Signature Patterns

Abche

Hanna²,

Younes³

et al. 2018

Linköping Electronic Conference Proceedings

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“…The latter techniques require very sophisticated network management and scheduling approaches such as presented in [1][2]. To mitigate such complexities, Code Division Multiple Access (CDMA) has been one of the candidates to be used in image transmission [2][3][4][5][6][7][8]. The techniques introduced in reference [2][3][4][5][6][7][8] have used a spatial CDMA approach which in turn ensures a fast transmission but failed to preserve the intensity values of the image (i.e.…”

Section: Introductionmentioning

confidence: 99%

Medical Image Transmission over Multi Core Optical Fiber Using Two Stages CDMA Technique

Abche

Toulani

Inaty

et al. 2011

2011 5th International Conference on Bioinformatics and Biomedical Engineering

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In this work, an approach to transmit high resolution medical images based on a double blind CDMA technology is proposed and investigated. The approach assumes that multiple users are transmitting images from one site to another. The images are encoded over a two steps procedure: 1) pixels coding using a spatial Optical Orthogonal Signature Patterns (OOSP) and 2) bit coding using time orthogonal basis functions. Then, the encoded images are multiplexed and the results are transmitted over a multi-core fiber optics. The approach is devised to achieve a fast transmission (parallel transmission) from one site into another. The transmitted images are perturbed by noise, such as user interference, and are de-multiplexed at the receiver end. That is, the images are decoded using the same double blind Orthogonal Signatures that are used for encoding purposes. Its performance is quantitatively evaluated using Monte-Carlo simulation techniques by studying different objective criteria, such as the Root Mean Square Error, the Bit Error Rate and the Pixel Error Rate.

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confidence: 99%

“…INTRODUCTION Optical code division multiple access (CDMA) has been investigated as an important multiple access methodology for future all-optical networks, due to its asynchronous access capability, flexibility of user allocation, ability to support variable bit rate and bursty traffic, and security against unauthorized users [1]- [6]. Most research on optical CDMA has concentrated on the intensity-modulation and direct-detection signaling-for example, on-off keying (OOK) and pulse position modulation (PPM).…”

mentioning

confidence: 99%

Use of Turbo Coding for Embedded Transmission Scheme in Optical CDMA

Arai

Kamakura

Yashiro

2005

TENCON 2005 - 2005 IEEE Region 10 Conference

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We propose using turbo code for the embedded transmission (ET) scheme [1][2] in optical code division multiple access (CDMA). Although the scheme uses pulse position modulation (PPM), to resolve the problem of the vulnerability of the embedded PPM signaling to multiple access interference (MAI), we obtain soft information of the received signal, which is used for turbo decoding. We evaluate the bit error rate (BER) of the proposed scheme, compared the conventional PPM-OCDMA with turbo coding and the ET scheme with BCH coding. Simulation results show that the proposed scheme achieves better BER than the conventional turbo-coded PPM-OCDMA and than the BCH-coded ET scheme.Index Terms -Turbo coding, embedded transmission (ET) scheme, pulse position modulation (PPM), code division multiple access (CDMA), multiple access interference (MAI).

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An embedded transmission scheme using ppm signaling with symmetric error-correcting codes for optical CDMA

Cited by 8 publications

References 18 publications

Transmission of Medical Images over Multi-Core Optical Fiber using CDMA: Effect of Spatial Signature Patterns

Transmission of Medical Images over Multi-Core Optical Fiber using CDMA: Effect of Spatial Signature Patterns

Medical Image Transmission over Multi Core Optical Fiber Using Two Stages CDMA Technique

Use of Turbo Coding for Embedded Transmission Scheme in Optical CDMA

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