Performance Evaluation of Multi-Carrier CDMA in the Presence of AWGN and dispersion of Optical Fiber

Subject Areas : Information Technology in Engineering Design (ITED) Journal

Fatemeh  Ghaani ¹ (دانشجو کارشناسی ارشد مهندسی الکترونیک دانشگاه فردوسی مشهد)
Amir  Abbasi ² (دانشجو کارشناسی ارشد مهندسی الکترونیک دانشگاه فردوسی مشهد)

Received: 2017-06-19 Accepted : 2017-06-19 Published : 2016-02-20

Keywords:

Abstract :

The tremendous growth of Internet, both in terms of the number of users and the usage time, and thus bandwidth taken by each user, is a major factor that has made the need of optical telecommunication networks and modulations with high spectrum efficiency undeniable. In this paper, the performance of each modulation CDMA, OFDM can be individually investigated and simulated. The combination between OFDM and CDMA systems to achieve better spectrum efficiency in opical fiber is proposed and its performance in the presence of AWGN and dispersion is simulated. The OOC codes are used to asign to the user and the reciever is a PIN detector. he simulation results are compared in different situation and combinations of the wo modulation is preffered other methods.