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Jindal, Shilpa
- Analysis of Multi Dimensional Codes for OCDMA System
Authors
1 Department of Electronics Electrical and Communication Engineering, PEC University of Technology, Sector 12, Chandigarh, IN
Source
Networking and Communication Engineering, Vol 4, No 12 (2012), Pagination: 732-737Abstract
The wide-ranging services of the Internet have caused the rapid increase of bandwidth requirements on the access networ that can be achieved by relying on fiber optics for future networks. OCDMA is a technology to realize multiplexing transmission and multiple access by coding in the optical domain, supporting multiple simultaneous transmissions in the same timeslot, space and frequency. It is another technology of multiplexing and multiple access. Performance of OCDMA is based on coding techniques. Through this communication various codes for these networks proposed by researchers are discussed like zero cross correlation codes, Perfect Difference Code Set based , optical orthogonal codes, Quasi optical orthogonal codes ,Constant Weight Symmetric OOC, Constant Weight Asymmetric OOC, Variable Weight OOC, Prime Codes, Modified Prime Codes, Time Spreading codes , Frequency Hopping Codes, Linear Congruence codes, Quadratic Congruence codes, Extended Quadratic Congruence codes, Bipolar Codes , Costas Arrays e.t.c and the codes proposed by authors based on two models A and B .Based on their methodology comparison thereof is drawn that the codes given by researchers are easy to construct and have good properties.
Keywords
Optical Code Division Multiple Access, Optical Orthogonal Codes, Prime Sequences, 1d, 2d, 3d, Algebraic Congruent Operator, Linear Congruent Operator, Quadratic Congruent Operator, Hyperbolic Congruent Operator, Cubic Congruent Operator, Galois Field, Golomb.
- Comparison of 3D OCDMA Models at Variable Received Power For High Speed Applications
Authors
1 Department of Electronics Electrical and Communication Engineering, PEC University of Technology, Sector 12, Chandigarh, IN
Source
International Journal of Scientific Engineering and Technology, Vol 2, No 8 (2013), Pagination: 793-796Abstract
For any spread spectrum technology, the number of active users at a given data rate with acceptable level of BER and quality factor are highly dependent on type of sequence selected for spreading and de spreading. In this paper 3D temporal/ spectral / spatial codes based on optical orthogonal codes and different operators from algebra theory are considered at data rate up to 10 Gb/s per user with variable received power till - 36dBm for 3D OCDMA. The different models thus designed are compared in terms of eye diagram, signal strength, BER and quality factor. Performance of designed 3D OCDMA system is higher and is compared with the simulated results from other researchers available in terms of number of active users, BER and data rate.Keywords
Optical Code Division Multiple Access, Optical Orthogonal Codes, Linear Congruent Operator, Cubic Congruent Operator, Quadratic Congruent Operator, Hyperbolic Congruent Operator, Galois Field (5), 3 Dimensional, Bit Error Rate.Full Text
