Quadratic-Congruence Carrier-Hopping Prime Code for Multicode-Keying Optical CDMA

2007 ◽  
Author(s):  
Wing C. Kwong ◽  
Cheng-Yuan Chang ◽  
Hung-Ta Chen ◽  
Guu-Chang Yang
Keyword(s):  
Optical Cdma ◽  
Quadratic Congruence

A Review on Successive Interference Cancellation-Based Optical PPM-CDMA Signaling

2017 ◽  
Vol 38 (1) ◽  
Author(s):  
Naif Alsowaidi ◽  
Tawfig Eltaif ◽  
Mohd Ridzuan Mokhtar
Keyword(s):  
Interference Cancellation ◽  
Multiple Access ◽  
Multiple Access Interference ◽  
Successive Interference Cancellation ◽  
Optical Cdma ◽  
Quadratic Congruence ◽  
Random Location ◽  
High Intensity Signal ◽  
Code Division Multiple ◽  
The Impact

AbstractThis paper presents a comprehensive review of successive interference cancellation (SIC) scheme using pulse position modulation (PPM) for optical code division multiple access (OCDMA) systems. SIC scheme focuses on high-intensity signal, which will be selected after all users were detected, and then it will be subtracted from the overall received signal, hence, generating a new received signal. This process continues till all users eliminated one by one have been detected. It is shown that the random location of the sequences due to PPM encoding can reduce the probability of concentrated buildup of the pulse overlap in any one-slot time, and support SIC to easily remove the effect of the strongest signal at each stage of the cancellation process. The system bit error rate (BER) performance with modified quadratic congruence (MQC) codes used as signature sequence has been investigated. A detailed theoretical analysis of proposed system taking into account the impact of imperfect interference cancellation, the loss produced from the splitting during encoding and decoding, the channel loss and multiple access interference is presented. Results show that under average effective power constraint optical CDMA system using SIC scheme with

Design of variable–weight quadratic congruence code for optical CDMA

2015 ◽  
Vol 72 ◽  
pp. 281-285
Author(s):  
Gang Feng ◽  
Wen-Qing Cheng ◽  
Fu-Jun Chen
Keyword(s):  
Optical Cdma ◽  
Variable Weight ◽  
Quadratic Congruence

Multirate asynchronous optical CDMA system with product code

2002 ◽  
Vol 149 (5) ◽  
pp. 299-304 ◽  
Author(s):  
M.-Y. Liu ◽  
H.-W. Tsao
Keyword(s):  
Optical Cdma ◽  
Cdma System ◽  
Product Code

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
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