Using Bipolar Codes in Non-coherent Optical CDMA Systems to Stabilize Decision Threshold for BER Performance Improvement

2006 ◽  
Vol 27 (6) ◽  
Author(s):  
M.T. Cha ◽  
Rainfield Y. Yen ◽  
K. Dimyati ◽  
M.K. Abdullah
Keyword(s):  
Performance Improvement ◽  
Optical Cdma ◽  
Decision Threshold ◽  
Cdma Systems ◽  
Ber Performance

BER performance comparison of optical CDMA systems with/without turbo codes

2002 ◽  
Author(s):  
Muralidhar Kulkarni ◽  
Vijender S. Chauhan ◽  
Yashpal Dutta ◽  
Ravindra K. Sinha
Keyword(s):  
Turbo Codes ◽  
Performance Comparison ◽  
Optical Cdma ◽  
Cdma Systems ◽  
Ber Performance

Address codes for use in all-optical CDMA systems

1996 ◽  
Vol 32 (13) ◽  
pp. 1154 ◽  
Author(s):  
J.-G. Zhang
Keyword(s):  
Optical Cdma ◽  
All Optical ◽  
Cdma Systems

BER performance analysis of FSO using hybrid-SIM technique with APD receiver over weak and strong turbulence channels

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rajat Kumar Giri
Keyword(s):  
Performance Improvement ◽  
System Performance ◽  
Avalanche Photodiode ◽  
Free Space Optical ◽  
Error Performance ◽  
Strong Turbulence ◽  
Meijer G Function ◽  
Hermite Approximation ◽  
Ber Performance ◽  
Better Than

Abstract In this paper, a hybrid-subcarrier-intensity-modulation (hybrid-SIM) technique for the performance improvement of free-space-optical (FSO) communication system has been proposed. Subsequently, for further error performance improvement, avalanche photodiode (APD) based receiver is used in the proposed system. The system performance is analyzed at various atmospheric turbulence levels over weak and strong turbulence channels. The bit error rate (BER) is theoretically derived using Gauss–Hermite approximation and Meijer-G function and it is simulated in the MATLAB environment. The simulation result shows that the BER performance of hybrid-SIM is better than BPSK-SIM technique irrespective of the channel types and also the significant BER performance improvement is observed by APD receiver.

A Rapid Code Acquisition Scheme for Optical CDMA Systems

2010 ◽  
pp. 21-30
Author(s):  
Youngyoon Lee ◽  
Dahae Chong ◽  
Chonghan Song ◽  
Youngpo Lee ◽  
Seung Goo Kang ◽  
...  
Keyword(s):  
Optical Cdma ◽  
Code Acquisition ◽  
Acquisition Scheme ◽  
Cdma Systems
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