Performance analysis of opticalCDMA with prime codes

Yang, Guu-Chang; Kwong, Wing C.

doi:10.1049/el:19950202

Cited by 110 publications

(75 citation statements)

References 4 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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“…Extended prime code (EPC) was introduced in [11]. A number of (p − 1) extra zeros are padded after every p elements in a prime sequence.…”

Section: Extended Prime Codementioning

confidence: 99%

User unsuppressible protocol sequences for collision channel without feedback

Chen

Shum

Sung

et al. 2008

2008 International Symposium on Information Theory and Its Applications

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A revisit of the model of collision channel without feedback (CCw/oFD) has motivated some interesting designs on periodic binary sequences. The protocol and system simplicity is particularly favorable for applications in certain wireless sensor and ad hoc networks. User unsuppressibility for individual service guarantee is desirable and emphasized here. We review some protocol sequences that are user unsuppressible (UU). Lower bounds of sequence length are obtained. Some corresponding sequence sets are identified.

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“…But using Spread-Spectrum techniques, such as OCDMA, independent and simultaneous channel access can be granted for several network nodes [4]. Different code families have beeen proposed [5], [6], [7], each with particular properties that affect system's parameters like the bit-error rate (BER) or the maximum data rate achievable.…”

Section: Introductionmentioning

confidence: 99%