The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Performance of multi-user codes in wireless communications
Author:	Ulislam, Muhammad Tauseef
View Online:	njit-etd2005-058 (x, 39 pages ~ 1.3 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Akansu, Ali N. (Committee chair) Haimovich, Alexander (Committee member) Shi, Yun Q. (Committee member)
Date:	2005-05
Keywords:	Wireless networks Multi path fading models Multi-user codes
Availability:	Unrestricted
Abstract:	Multi-user codes are a widely used in transmitting user data from base station to mobile station and vice versa. In wireless communications a signal received by a mobile station goes through different fading channels resulting. These multi-paths add constructively and destructively with different delays and attenuation at the mobile station. The autocorrelation and cross correlation properties of the Multi-user codes play a significant role in extracting the user data from the signal corrupted by multipath fading channel. The thesis presents a comparison of different Multi-user codes based on their autocorrelation and cross correlation properties. These codes are passed through a multipath fading models and their performance is evaluated based on the Bit Error Rate (BER). The performance for the Multi-user codes is compared both in synchronous and asynchronous mode of transmission to the base station. The model used for simulating multipath fading channel is Clark model.