Paper Info
Title
Performance Evaluation of Bit Loading, Subcarrier Allocation, and Power Control Algorithms for Cellular OFDMA Systems
Abstract
We consider the problem of radio resource allocation for QoS support in the downlink of a cellular OFDMA system. The major impairments present axe co-channel interference (CCI) and frequency selective fading. The allocation problem involves assignment of base stations, subcarriers and bits, as well as power control, for multiple users. We evaluate the performance of a three-stage, low-complexity, heuristic algorithm, which allows to distribute radio resources among multiple users according to theirs individual QoS requirements, while at the same time maintaining the QoS of already established links in all co-channel cells. The evaluation includes checking system operation for various conditions described by different: a) delay spread, b) data rate required by a single user and c) path loss. It is shown that the proposed method is superior in terms of offered traffic and blocking probability to classical method based on FDMA with power control. Also, the performance of our scheme increases in highly frequency selective environment, disastrous for classical fixed schemes, since our method benefits from multiuser diversity.
Year
DOI
Venue
2004
10.1007/978-3-540-30199-8_29
Lecture Notes in Computer Science
Keywords
Field
DocType
base station,power control,heuristic algorithm,path loss,co channel interference
Subcarrier,Fading,Computer science,Power control,Quality of service,Resource allocation,Path loss,Frequency-division multiple access,Orthogonal frequency-division multiplexing,Distributed computing
Conference
Volume
ISSN
Citations 
3260
0302-9743
0
PageRank 
References 
Authors
0.34
8
2
Name
Order
Citations
PageRank
Slawomir Pietrzyk151.17
Gerard J. M. Janssen27319.73