Deakin University
Browse

File(s) not publicly available

Radio resource management for fast fading environments

journal contribution
posted on 2011-10-01, 00:00 authored by L Sivridis, X Wang, Jinho ChoiJinho Choi
Adaptive resource allocation based on perfect Channel State Information (CSI) can significantly improve the performance of Orthogonal Frequency Division Multiple Access (OFDMA) systems. However, in real systems, accurate CSI is impossible because of noisy channel estimates, channel feedback delays, and processing delays. Therefore, only imperfect CSI can be used for resource allocation purposes. In this paper, we minimize the impact of errors caused by imperfect CSI and evaluate the significance of periodic CSI feedback in a fast fading environment. In a fast fading environment, periodic CSI feedback requires a high overhead load; and the uplink resources reserved for feedback purposes are limited. Thus, we present a strategy that optimizes the usage of those uplink resources. Simulation results show that this strategy leads to a higher overall fairness and system throughput.

History

Journal

Journal of communications

Volume

6

Pagination

540-548

Location

Oulu, Finland

ISSN

1796-2021

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2011, Academy Publishers

Issue

7

Publisher

Academy Publishers