Abstract—To support multi-service and guarantee quality of
service, variable-weight code is needed in OCDMA system.
However, such codes suffer from high cross-correlation
products which create high multiple access interference (MAI)
that significantly reduces the capacity of the system. To mitigate
MAI, In this paper, we study the Parallel Interference
Cancellation (PIC) receiver efficiency in Variable-Weight
OCDMA (VW-OCDMA). We develop the analytical expression
of the error probability with variable-weight optical orthogonal
code for one stage PIC receiver. Furthermore, the system has
been tested for five users. Simulation results show that by using
PIC receiver we obtain good performance in VW-OCDMA
system, and the highest priority user can be assigned to a
codeword with the largest weights to guarantee the lowest bit
error rate.
Index Terms—OCDMA, variable-weight optical orthogonal
codes, multiple access interference, parallel interference
cancellation.
The authors are with National Key Laboratory of Science and
Technology on space Microwave, China Academy of Space Technology
(Xi‟an), Xi‟an, 710100, China (e-mail: liangw@cast504.com,
lij@cast504.com, zhangy4@cast504.com, lijl@cast504.com,
weijy@cast504.com).
[PDF]
Cite: Wei Liang, Jun Li, Yi Zhang, Jingling Li, and Jiayuan Wei, "Performance of Parallel Interference Cancellation Scheme in VW-OCDMA Systems," International Journal of Future Computer and Communication vol. 5, no. 1, pp. 53-56, 2016.
