A Simple Channel Estimation Method for MIMO-OFDM in IEEE802.16a

Drieberg , Micheal and Yew, Kuan Min and Jeoti , Varun (2004) A Simple Channel Estimation Method for MIMO-OFDM in IEEE802.16a. In: IEEE TENCON, 21-24 November 2004, Chiangmai, Thailand.

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Official URL: http://ieeexplore.ieee.org/iel5/9709/30647/0141466...


Both orthogonal frequency division multiplexing (OFDM) and multi-input multi-output (MIMO) are generic techniques that are being actively considered for applications in 4G mobile. In MIMO applications, the channel between each pair of transmitter and receiver needs to be estimated accurately for coherent demodulation and space-time (ST) codes decoding to work optimally.

In this work, we propose a simple channel estimation method for a MIMO-OFDM system based on IEEE802.16a (wireless Metropolitan Area Network (MAN)). The method works by cyclically rotating the same preamble at each transmitter by a different number of samples in such a way that the channel impulse response (CIR) of the channels from each transmitter can be separated in time. Using just simple processing at each receiver, the CIR of the respective channels from each of the transmitter can be separated and their estimates obtained.

The estimation method has been tested extensively in simulations of 2x2 MIMO-OFDM system based on IEEE802.16a standard developed in Matlab/Simulink. The ST code used is Alamouti’s ST Block Code which gives very good performance and is quite simple to implement. Results show that the overall system BER are nearly as good as the upper bound performance that is obtained with perfect channel state information(CSI).

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments / MOR / COE: Departments > Electrical & Electronic Engineering
Depositing User: Micheal Drieberg
Date Deposited: 23 Dec 2010 08:47
Last Modified: 23 Dec 2010 08:47
URI: http://scholars.utp.edu.my/id/eprint/3612

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