By Topic

Packet Scheduling in the Presence of Channel Estimation Error in Multi-User OFDM Wireless Systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Jae-Hoon Jeon ; Sch. of Electr. Eng. & INMC, Seoul Nat. Univ. ; Yong-Hwan Lee

In this paper, we investigate the performance of a packet-based multi-user orthogonal frequency division multiplexing (OFDM) wireless system in the presence of channel estimation error. To this end, we consider the use of two channel estimation schemes for coherent demodulation; one is a simple linear and the other is an optimum Wiener-type channel estimator. We examine the effect of channel impulse response (CIR) estimation error on the coherent reception and then the effect of signal-to-interference and noise ratio (SINR) estimation error on channel aware transmission techniques (e.g., packet scheduling). It is shown that the performance of coherent reception is relatively less susceptible to the CIR error, but the performance of channel aware schemes can be very sensitive to the SINR estimation error, mainly due to incorrect scheduling. To alleviate this problem, we propose a scheduling scheme which can work without significant performance degradation in the presence of large channel estimation error. Finally, we verify the performance of the proposed scheduling scheme by computer simulation

Published in:

Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on

Date of Conference:

2-5 July 2006