Dissertation/Thesis Abstract

Performance of Symmetrically and Asymmetrically Mapped 4X1 Space-Time-Frequency Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing System
by Ghori, Naila Mariam, M.S., California State University, Long Beach, 2018, 43; 10690278
Abstract (Summary)

In wireless communication systems, diversity schemes improve the message reliability and help combat fading. Thus, by exploiting diversity schemes like Space, Time, and Frequency, Space-Time-Frequency codes are generated. These Space-Time-Frequency Block Codes (STFBC) are a combination of Space-Time Block Codes (STBC) and Space-Frequency Block Codes (SFBC). In these Space-Time- Frequency codes, channel codes use time diversity and frequency diversity followed by an orthogonal design which provides spatial diversity. The frequency diversity is applied first and then the time diversity to form the Space-Time-Frequency code.

The performance of 4X1 Space-Time Block Codes (STBC), 4X1 Space-Frequency Block Codes (SFBC), and 4X1 Space-Time-Frequency Block Codes (STFBC) for 4G conditions are evaluated. Simulation results show that Space-Time-Frequency Block Codes (STFBC) are a good compromise in terms of performance and delay. For Space-Time-Frequency Block Codes (STFBC) an asymmetric mapping technique is introduced and the simulation of 4X1 asymmetrically mapped Space-Time-Frequency Block Codes provided a better Bit-Error-Rate (BER) compared to the 4X1 symmetrically mapped Space-Time-Frequency Block Codes. Simulations are performed in MATLAB for Jakes spectrum model and also for COST207 model.

Indexing (document details)
Advisor: Yeh, Hen-Geul (Henry)
Commitee: Kwon, Seok-Chul (Sean), Mozumdar, Mohammad
School: California State University, Long Beach
Department: Electrical Engineering
School Location: United States -- California
Source: MAI 57/04M(E), Masters Abstracts International
Subjects: Engineering, Electrical engineering
Publication Number: 10690278
ISBN: 978-0-355-65019-8
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