TY - JOUR
T1 - Mitigation of MAIs by the second encoding scheme in TTFR-based optical CDMA systems
AU - Miyazawa, Takaya
AU - Sasase, Iwao
N1 - Funding Information:
ACKNOWLEDGMENT This work is partly supported by Keio University COE Program on “Optical and Electronic Device Technology for Access Network” by Ministry of Education, Culture, Sports, Science and Technology, Japan.
Publisher Copyright:
© 2005 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
PY - 2005
Y1 - 2005
N2 - In optical code division multiple access(CDMA) networks, the system which equips tunable transmitters and fixed receivers (i.e. TTFR) achieves simple configuration and protocols. However, when there are other simultaneous users who transmits pulses with the same code, large amount of multiple access interferences(MAIs) cause serious performance degradation. In this paper, we propose second encoding scheme in which first-encoded optical pulses are further encoded by the second optical orthogonal code(OOC) assigned to the transmitter. The proposed system with second encoding scheme can achieve higher processing gain in the correlator than the conventional system without second encoding scheme because the number of weights increases due to the second encoding. This results in the mitigation of the effect of MAIs. We analyze performance of the proposed system and show that the proposed system with second coding scheme can achieve better bit error probability than the conventional system without second encoding scheme.
AB - In optical code division multiple access(CDMA) networks, the system which equips tunable transmitters and fixed receivers (i.e. TTFR) achieves simple configuration and protocols. However, when there are other simultaneous users who transmits pulses with the same code, large amount of multiple access interferences(MAIs) cause serious performance degradation. In this paper, we propose second encoding scheme in which first-encoded optical pulses are further encoded by the second optical orthogonal code(OOC) assigned to the transmitter. The proposed system with second encoding scheme can achieve higher processing gain in the correlator than the conventional system without second encoding scheme because the number of weights increases due to the second encoding. This results in the mitigation of the effect of MAIs. We analyze performance of the proposed system and show that the proposed system with second coding scheme can achieve better bit error probability than the conventional system without second encoding scheme.
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U2 - 10.1109/ISIT.2005.1523362
DO - 10.1109/ISIT.2005.1523362
M3 - Conference article
AN - SCOPUS:34547246262
SN - 2157-8095
VL - 2005-January
JO - IEEE International Symposium on Information Theory - Proceedings
JF - IEEE International Symposium on Information Theory - Proceedings
M1 - 1523362
T2 - 2005 IEEE International Symposium on Information Theory, ISIT 05
Y2 - 4 September 2005 through 9 September 2005
ER -