Title :
Chip-level receivers in optical overlapping PPM-CDMA
Author :
Shalaby, Hossam M H
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
A chip-level detector for optical overlapping pulse-position modulation code-division multiple-access (OPPM-CDMA) communication systems is proposed. The bit error rate of the proposed system is derived and compared to some traditional receivers under the constraints of fixed data rate and laser pulsewidth. These traditional receivers include OOK-, PPM-, and OPPM-CDMA correlators. The throughput limitations of all these receivers are also presented and compared. Our results reveal that a significant improvement in the performance is gained when using the proposed scheme. A throughput limitation of about 7.5 times greater than that of OOK-CDMA correlator is reported on the average
Keywords :
code division multiple access; error statistics; optical correlation; optical modulation; optical receivers; optical signal detection; pulse position modulation; OOK-CDMA correlator; OPPM-CDMA correlator; PPM-CDMA correlator; bit error rate; chip-level receivers; code-division multiple-access; direct detection communication systems; fixed data rate; laser pulsewidth; optical overlapping PPM-CDMA; performance; pulse-position modulation; throughput limitations; Bit error rate; Correlators; Modulation coding; Multiaccess communication; Optical detectors; Optical modulation; Optical pulses; Optical receivers; Pulse modulation; Throughput;
Conference_Titel :
Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on
Conference_Location :
Sun City
Print_ISBN :
0-7803-4281-X
DOI :
10.1109/ISSSTA.1998.722510
