Analysis of multiwavelength optical orthogonal CDMA communication system

✍ Scribed by K. Murugesan; V. C. Ravichandran

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 284 KB
• Volume: 22
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19990805)22:3<182::aid-mop9>3.0.co;2-d

✦ Synopsis

The concept of a multiwa¨elength was recently introduced in order to support a large number of simultaneous users in optical ( ) code-di¨ision multiple-access CDMA networks without the need for complicated optical signal processing. A number of multiwa¨elength ( ) optical orthogonal codes MWOOC ha¨e been de¨eloped, and these codes show better performance under hea¨y traffic load conditions. In this paper, a complete analysis of the multiwa¨elength OOCDMA communication system is presented, including the effects of a¨alanche photo-( ) diode APD noise, thermal noise, and multiple-user interference for a direct-detection recei¨er. The results of the analysis are compared with the performance of an optical orthogonal CDMA system that uses only one wa¨elength, i.e., single-wa¨elength optical orthogonal codes ( ) SWOOC . Typically, for 825, 826.1, and 827.2 nm, with y60 dB laser power and 50 simultaneous users, P is 4.17 = 10 y 15 compared to e 1.77 = 10 y 5 at 825 nm in a SWOOC system. In the presence of ¨arious noises, the MWOOC system exhibits impro¨ed error performance o¨er the SWOOC system.