Design and performance analysis of wavelength/time (W/T) matrix codes for optical CDMA

Mendez, Antonio J.; Gagliardi, R.; Hernandez, V.J.; Bennett, C.V.; Lennon, W.J.

doi:10.1109/jlt.2003.819127

Cited by 84 publications

(55 citation statements)

References 24 publications

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“…Consequently, in the earlier years, the research on incoherent OCDMA focused on looking for and obtaining unipolar codes with good auto-and cross-correlations, such as OOC (Optical Orthogonal/Pseudo-Orthogonal Codes) [1], [8], PC (Prime Codes), QCC (Quadratic Congruence Codes) [9] etc. In order to improve the performances of PC and QCC, EPC (Extended Prime Codes) [10], MPC (Modified Prime Codes) [11] and EQCC (Extended Quadratic Congruence Codes) [12] have been proposed again. Among these one dimensional codes, OOC has the best performance but its construction is complicated, compared with those of other codes [13].…”

Section: Optical Code Division Multiple Access (Ocdma)mentioning

confidence: 99%

Performance Analysis of Two Dimensional Wavelength/ Time Encoding System for Optical CDMA Networks

Fakih¹,

Panbude²,

Jagtap³

2014

IJCCE

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Abstract-Optical code-division multiple access (OCDMA) combines the large bandwidth of the fiber medium with the flexibility of the CDMA technique to achieve the high-speed connectivity.OCDMA has the potential to support asynchronous, bursty communications. The establishment of OCDMA needs to overcome the cardinality problem of 1-D codes. In order to increase the number of users, unipolar codes with larger capacity need to be designed. In this paper we have analyzed the performance of an incoherent OCDMA scheme based on wavelength/time codes. This paper shows that 2-D codes have better spectrum efficiency than 1-D OCDMA codes of the same cardinality.Index Terms-Code-division multiple access (CDMA), unipolar codes, wavelength hopping/time spreading (W/T), encoding, cardinality, multiple access interference (MAI).

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Section: Optical Code Division Multiple Access (Ocdma)mentioning

confidence: 99%

Performance Analysis of Two Dimensional Wavelength/ Time Encoding System for Optical CDMA Networks

Fakih¹,

Panbude²,

Jagtap³

2014

IJCCE

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“…Research is still going on to develop a better OCDMA code which will support the multimedia services. The design of a set of eight matrix codes for operation at 2.5 Gbps has been described [15]. The intensity fluctuations directly affect on the performance of lightwave systems and it is characterized by the relative intensity noise (RIN) which is discussed.…”

Section: Introductionmentioning

confidence: 99%

Impact of RIN on Optical CDMA Transmission System

Raju¹,

Kumar²,

Rana³

2014

IJCA

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Optical code division multiple access (OCDMA) is one of the most upcoming technologies for future multiple access techniques along with WDMA and OTDMA. Optical CDMA offers greater scalability than other optical multiplexing technique and it provides flexible quality of service and data access security. OCDMA requires increasing demand for high speed, large capacity communications in optical networks which allow multiple users to share the fiber bandwidth. The data for multiple users are multiplexed asynchronously. In this Paper, we have presented an OCDMA model to the range of 90km. The simulation results reveal that the transmission distance is limited mainly by the Relative Intensity Noise (RIN) which arises when there is instability in the power level of a laser in the system because of the fact that RIN can be generated from fluctuations in the laser gain medium.

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“…We have been investigating a wavelength/time O-CDMA system utilizing codes derived from folded Golomb rulers, which have the advantage over other codes in requiring fewer time slots [6]. Simulations show that a 32-user code-weight-four system may be implemented with only eight wavelengths and eight time slots, if optical hard limiting (OHL) is used [7].…”

Section: Introductionmentioning

confidence: 99%

Bit-error-rate analysis of a 16-user gigabit ethernet optical-CDMA (O-CDMA) technology demonstrator using wavelength/time codes

Hernandez

Mendez

Bennett

et al. 2005

IEEE Photon. Technol. Lett.

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Abstract-This letter describes a technology demonstrator for an incoherent optical code-division multiple-access scheme based on wavelength/time codes. The system supports 16 users operating at 1.25 Gsymbols/s/user while maintaining bit-error rate (BER) 10 11 for the correctly decoded signal. Experiments support previous simulations which show that coherent beat noise, occurring between the signal and multiple access interference, ultimately limits system performance.

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Design and performance analysis of wavelength/time (W/T) matrix codes for optical CDMA

Cited by 84 publications

References 24 publications

Performance Analysis of Two Dimensional Wavelength/ Time Encoding System for Optical CDMA Networks

Performance Analysis of Two Dimensional Wavelength/ Time Encoding System for Optical CDMA Networks

Impact of RIN on Optical CDMA Transmission System

Bit-error-rate analysis of a 16-user gigabit ethernet optical-CDMA (O-CDMA) technology demonstrator using wavelength/time codes

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