Channel code aided decision-directed channel estimation for MIMO OFDM/SDMA systems based on the "expectation-conditional maximization either" algorithm
Channel code aided decision-directed channel estimation for MIMO OFDM/SDMA systems based on the "expectation-conditional maximization either" algorithm
In this paper, a Forward Error Coded (FEC) Decision-Directed (FEC-DD) channel estimation scheme is proposed for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing/Space Division Multiple Access (OFDM/SDMA) systems which is based on the Expectation-Conditional Maximization Either (ECME) algorithm. The proposed DD technique is combined with the Optimised Hierarchy Reduced Search Algorithm (OHRSA) based Multi-User Detector (MUD) and directly calculates the Maximization-Step (M-Step) by conditionally maximizing the logarithmic likelihood function of the "incomplete" data. We avoid the employment of matrix inversion, since only a single subcarrier's Frequency-Domain CHannel Transfer Function (FD-CHTF) is calculated at a time, since we assume that the other subcarriers' FD-CHTFs are the most recent estimates from the previous iteration of the proposed scheme. Our simulation results have demonstrated that the proposed scheme is capable of reducing the received power requirement by 4 dB upon exploiting the error correction capability of a FEC decoder within the ECME loop.
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Mu, Xiaomin
3d578909-36ba-4b16-b703-2ef63532116c
10 December 2010
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Mu, Xiaomin
3d578909-36ba-4b16-b703-2ef63532116c
Zhang, Jiankang, Hanzo, Lajos and Mu, Xiaomin
(2010)
Channel code aided decision-directed channel estimation for MIMO OFDM/SDMA systems based on the "expectation-conditional maximization either" algorithm.
IEEE Global Telecommunications Conference, 2010. GLOBECOM 2010, Miami, Miamai, United States.
06 - 10 Dec 2010.
Record type:
Conference or Workshop Item
(Poster)
Abstract
In this paper, a Forward Error Coded (FEC) Decision-Directed (FEC-DD) channel estimation scheme is proposed for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing/Space Division Multiple Access (OFDM/SDMA) systems which is based on the Expectation-Conditional Maximization Either (ECME) algorithm. The proposed DD technique is combined with the Optimised Hierarchy Reduced Search Algorithm (OHRSA) based Multi-User Detector (MUD) and directly calculates the Maximization-Step (M-Step) by conditionally maximizing the logarithmic likelihood function of the "incomplete" data. We avoid the employment of matrix inversion, since only a single subcarrier's Frequency-Domain CHannel Transfer Function (FD-CHTF) is calculated at a time, since we assume that the other subcarriers' FD-CHTFs are the most recent estimates from the previous iteration of the proposed scheme. Our simulation results have demonstrated that the proposed scheme is capable of reducing the received power requirement by 4 dB upon exploiting the error correction capability of a FEC decoder within the ECME loop.
Archive
GlobeCom_2010_Submitted_paper_Jiankang_zhang.tar
- Other
More information
Published date: 10 December 2010
Venue - Dates:
IEEE Global Telecommunications Conference, 2010. GLOBECOM 2010, Miami, Miamai, United States, 2010-12-06 - 2010-12-10
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 271415
URI: http://eprints.soton.ac.uk/id/eprint/271415
PURE UUID: b951b1a5-8c77-4f40-a681-952b7d208a66
Catalogue record
Date deposited: 18 Jul 2010 16:37
Last modified: 18 Mar 2024 03:14
Export record
Contributors
Author:
Jiankang Zhang
Author:
Lajos Hanzo
Author:
Xiaomin Mu
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics