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Title QoS Aware Subcarrier and Power Allocation in OFDMA Systems for Broadband Wireless Application
Degree MS
Author Mohmmad Anas
Advisor Kiseon Kim
Graduation Date 2005.02.24 File
    Date 2013-09-11 21:08
Wireless broadband technologies are anticipated to °ourish in the next few years,
due to the increasing demand for wireless connectivity and the need to support en-
hanced services and applications in local or wide area environments. The primary goal
in a communications system is Quality of Service (QoS) provisioning, which is synony-
mous to achieving an acceptable data transmission rate, signal-to-noise ratio (SNR)
or bit error rate (BER). Considering recent proposals for wide band multimedia ser-
vices with the existing spectrum allocations shows that spectrum resource management
remains an important topic in the near and distant future.
Using the essential feature of channel orthogonality as a baseline, our approach
places emphasis on Orthogonal Frequency Division Multiple Access (OFDMA), which
is an emerging modulation and multiple access method for next generation (NextG)
wireless broadband communication systems. The basic question which we tried an-
swering in this thesis is how to allocate subcarrier and power to provide broadband
wireless services to heterogeneous users di?erentiated on the basis of required QoS.
Since, the joint optimization problem of allocating subcarrier and power optimally to
satisfy user-level QoS (required data rate and BER) under the total available power
constraint, involves discrete assignment and is thus not convex in the unknowns of
subcarrier allocation and the available power, making it a NP-hard problem.
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광주과학기술원 한·러 MT-IT 융합기술연구센터 광주과학기술원정보통신공학부