Title :
Spectral efficiency limit of bipolar signaling in incoherent optical CDMA systems
Author :
Chang, T.-W.F. ; Sargent, Edward H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
A universal scheme is developed to reproduce the effect of bipolar signaling in a unipolar optical channel. Without any hardware modification, the electro-optic/opto-electronic (EOE) system proposed enables the transmission of any bipolar code sequence through the unipolar optical channel while maintaining the correlation properties of the codes. The bit error rate performance of the EOE system is shown to be identical to that of an optimal baseband bipolar phase shift keying code-division multiple access (CDMA) system. Hence, the maximum spectral efficiency of an incoherent optical CDMA system using bipolar codes is the same as that of an optimal bipolar baseband CDMA system
Keywords :
binary sequences; channel coding; code division multiple access; correlation methods; error statistics; optical fibre networks; telecommunication signalling; CDMA; EOE system; bipolar code sequence; bipolar signaling; bit error rate performance; code-division multiple access; correlation properties; electro-optic/opto-electronic system; incoherent optical systems; maximum spectral efficiency; unipolar optical channel; Baseband; Binary phase shift keying; Bit error rate; Hardware; Multiaccess communication; Optical modulation; Optical noise; Optical receivers; Optical transmitters; Signal processing;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965828
