Performance analysis of spectral/spatial of OCDMA system using 2D hybrid ZCC/MD code

Matem, Rima; Aljunid, S. A.; Junita, M. N.; Rashidi, C. B. M.; Aqrab, Israa Shihab

doi:10.11591/ijeecs.v13.i2.pp569-574

Cited by 4 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, nonadjacent placement increases the complexity of the code along with the design of encoder and decoder modules. Matem et al utilized a combination of 1D ZCC and MD codes to develop a 2D hybrid ZCC/MD code [34]. However, ZCC code employes code sequences with w = 3, which places an upper bound on the total number of users, as the code length is proportional to the weight of the code.…”

Section: Introductionmentioning

confidence: 99%

A Secure Optical Body Area Network Based on Free Space Optics and Time-Delayed 2D-Spectral/Spatial Optical CDMA

Kanwal,

Qureshi,

Imtiaz

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Free space optics (FSO)-based optical body area networks (OBANs) are receiving massive attention as an opportunity to address the limitations of their radio frequency (RF)-based counterparts. This boom in research interests is primarily due to multitude of benefits, including high capacity, immunity to electromagnetic interference (EMI), rapid installation, cost efficiency, and license-free use of spectrum. Securing the transmission of patient health data against interception in OBANs using insecure FSO channels is a challenging task. Therefore, we propose a low-cost, flexible, and secure OBAN based on FSO technology and a time-delayed two dimensional (2D) spectral/spatial optical code-division multiple access (OCDMA) system. The proposed architecture consists of eight sensors attached to the bodies of patients. The sensors operate at a rate of 50 kbps. Electrical data generated from each sensor are used to modulate an optical carrier and then encoded using 2D-spectral/spatial double weight–zero cross correlation (DW-ZCC) code. The 2D encoded optical signals are then time delayed to eliminate the multiple parallel FSO channels between the transmitter and medical center. The combined optical signal consists of eight 2D-encoded time-delayed optical signals transmitted towards a remote medical center over an FSO channel with a range of 1 km. The received signal is decoded and the data from each sensor are recovered after photodetection at the medical center for further analysis. The overall performance of the sensors is analyzed using bit-error rate (BER) and quality factor (Q-factor) plots for different weather conditions and lengths of the FSO channel, considering the log-normal channel model. The capital expenditure (CAPEX) of the proposed architecture is analyzed and compared with the conventional 2D-spectral/spatial FSO system to determine the overall impact of introducing time delay units on the cost of implementation.

show abstract

Section: Introductionmentioning

confidence: 99%

A Secure Optical Body Area Network Based on Free Space Optics and Time-Delayed 2D-Spectral/Spatial Optical CDMA

Kanwal,

Qureshi,

Imtiaz

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…There are also some two dimensional spectral/spatial codes have been proposed in order to improve the system capacity. Such as Two Dimensional-Single Weight Zero Cross Correlation (2D-SWZCC) code [24], two-dimensional hybrid ZCC/MD code [25], two-dimensional Fixed Right Shift (FRS) code [26] and two-dimensional Enhanced multi-diagonal (2D-EMD) Code [27]. Most of the two dimensional spectral/ spatial codes are usually constructed on the basis of onedimensional codes.…”

Section: Introductionmentioning

confidence: 99%

Development and performance improvement of a novel zero cross-correlation code for SAC-OCDMA systems

Ding

Nie

et al. 2020

Journal of Optical Communications

View full text Add to dashboard Cite

In order to improve the performance of the Spectral Amplitude Coding-Optical Code Division Multiple Access (SAC-OCDMA) system, a zero cross-correlation (ZCC) code named double weight multi-diagonal (DW-MD) is proposed with constant weight (CW) or variable weight (VW). Mathematical results illustrate that it is feasible to reduce the number of filters without sacrificing system performance by using the CW DW-MD code instead of the multi-diagonal (MD) code. And for the VW DW-MD code, the supportable number of users for lower code weight WL (3) at bit error rate (BER) of 10−3 (voice) is 43, medium code weight WM (4) at BER of 10−9 (data) is 29, and higher code weight WH (5) at BER of 10−12 (video) is 32. Finally, the analysis about the position of chips “1” is given, and the simulation setups show that the CW DW-MD code outperforms the MD code when Gaussian optical filter is used.

show abstract

Feasibility analysis of 2-dimensional permutation vector optical code division multiple access passive optical network

Ullah,

Imtiaz

et al. 2023

Optik

View full text Add to dashboard Cite

Performance analysis of spectral/spatial of OCDMA system using 2D hybrid ZCC/MD code

Cited by 4 publications

References 14 publications

A Secure Optical Body Area Network Based on Free Space Optics and Time-Delayed 2D-Spectral/Spatial Optical CDMA

A Secure Optical Body Area Network Based on Free Space Optics and Time-Delayed 2D-Spectral/Spatial Optical CDMA

Development and performance improvement of a novel zero cross-correlation code for SAC-OCDMA systems

Feasibility analysis of 2-dimensional permutation vector optical code division multiple access passive optical network

Contact Info

Product

Resources

About