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

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

doi:10.1109/lpt.2005.859486

Cited by 31 publications

(11 citation statements)

References 9 publications

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“…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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“…This assesses the effect of multiuser interference on the CR, as generated from the other users. In order to model a worst-case scenario, all users transmit simultaneously, since this is known to produce the most multiuser interference 9 .…”

Section: Performance Based On Simulationsmentioning

confidence: 99%

Architecture, design, and numerical simulation of a code/pulse-position-swapping (CPPS) direct translating receiver

Mendez¹,

Hernandez

Bennett

et al. 2011

SPIE Proceedings

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Code/pulse-position-swapping (CPPS) is a communications scheme that substitutes pulse-position-modulation (PPM) symbols with optical-code-division-access (O-CDMA) codes. CPPS retains the multiple bits per symbol communication of M-ary PPM and the asynchronous multiple access of O-CDMA. Additionally, CPPS has the advantages of granular communications, common electrical bandwidth for all users independent of data rates, compatibility with free-space or guided (fiber and waveguide) communication links, and compatibility with intensity modulation/direct detection. The transmitted symbols (codes) of CPPS are translated from a deserialized bit stream that has been divided into words of length log 2 M. Thus the receivers associate the detected symbol with the original bit sequence by means of an electronically implemented look-up-table (LUT). This paper describes the architecture and design of a direct translating receiver based on map-coding, which uses optical processing to output the transmitted bit sequence without the need for a LUT. Analyses and computations characterize the receiver concept in terms of bit errors (mistranslations).

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“…The system uses time/wavelength-coded O-CDMA 12 , whereby each encoded signal is represented as a sequence of multi-wavelength pulses. We specifically use a time/wavelength code set derived from folded optimum Golomb rulers 13 and base the simulator architecture on an actual technology demonstrator 14 . Fig.…”

Section: Simulation Descriptionmentioning

confidence: 99%

Design and evaluation of a virtual quadrant receiver for 4-ary pulse position modulation/optical code division multiple access (4-ary PPM/O-CDMA)

Mendez¹,

Hernandez

Gagliardi

et al. 2007

SPIE Proceedings

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M-ary pulse position modulation (M-ary PPM) is an alternative to on-off-keying (OOK) that transmits multiple bits as a single symbol occupying a frame of M slots. PPM does not require thresholding as in OOK signaling, instead performing a comparison test among all slots in a frame to make the slot decision. Combining PPM with optical code division multiple access (PPM/O-CDMA) adds the benefit of supporting multiple concurrent, asynchronous bursty PPM users. While the advantages of PPM/O-CDMA are well known, implementing a receiver that performs the comparison test can be difficult. This paper describes the design of a novel array receiver for M-ary PPM/O-CDMA (M = 4) where the received signal is mapped onto an xy-plane whose quadrants define the PPM slot decision by means of an associated control law. The receiver does not require buffering or nonlinear operations. In this paper we describe a planar lightwave circuit (PLCs) implementation of the receiver. We give detailed numerical simulations that test the concept and investigate the effects of multi-access interference (MAI) and optical beat interference (OBI) on the slot decisions. These simulations provide guidelines for subsequent experimental measurements that will be described.

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

Cited by 31 publications

References 9 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

Architecture, design, and numerical simulation of a code/pulse-position-swapping (CPPS) direct translating receiver

Design and evaluation of a virtual quadrant receiver for 4-ary pulse position modulation/optical code division multiple access (4-ary PPM/O-CDMA)

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