Title page for ETD etd-122199-153028


Type of Document Master's Thesis
Author Alam, Fakhrul
Author's Email Address faalam@vt.edu
URN etd-122199-153028
Title Simulation of Third Generation CDMA Systems
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Woerner, Brian D. Committee Chair
Reed, Jeffrey Hugh Committee Member
Tranter, William H. Committee Member
Keywords
  • Wireless Communications
  • Third Generation CDMA Systems
  • Wideband CDMA
  • Simulation of Communication Systems
Date of Defense 1999-12-15
Availability unrestricted
Abstract
Simulation of Third Generation CDMA Systems

Fakhrul Alam

ABSTRACT

The goal for the next generation of mobile communications system is to seamlessly integrate a wide variety of communication services such as high speed data, video and multimedia traffic as well as voice signals. The technology needed to tackle the challenges to make these services available is popularly known as the Third Generation (3G) Cellular Systems. One of the most promising approaches to 3G is to combine a Wideband Code Division Multiple Access (WCDMA) air interface with the fixed network of Global System for Mobile communications (GSM). In this thesis a signal simulator was implemented according to the physical layer specification of the IMT-2000 WCDMA system. The data is transmitted in a frame by frame basis through a time varying channel. The transmitted signal is corrupted by multiple access interference which is generated in a structured way rather than treating it as Additive White Gaussian Noise (AWGN). The signal is further corrupted by AWGN at the front end of the receiver. Simple rake diversity combining is employed at the receiver. We investigate the bit error rate at both uplink and downlink for different channel conditions. Performance improvement due to error correction coding scheme is shown. The simulator developed can be an invaluable tool for investigating the design and implementation of WCDMA systems.

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