RLS-Adaptive Parallel Interference Cancellation Assisted Decision-directed Channel Estimation for OFDM
RLS-Adaptive Parallel Interference Cancellation Assisted Decision-directed Channel Estimation for OFDM
Abstract—OFDM systems employing multiple transmit antennas have recently drawn wide interest in the context of both space-time coded- and multi-user space-division multiple access (SDMA) arrangements. A prerequisite for using coherent detection at the receiver is the availability of reliable channel transfer factor estimates. Robust parallel interference cancellation (PIC) assisted decision-directed channel estimation (DDCE) has been shown in the literature to be also applicable to scenarios, where the number of users is in excess of the number of OFDM subcarriers - normalized to the number of Channel Impulse Response (CIR) related taps to be estimated - which imposed a limitation in the context of least-squares assisted DDCE techniques invoked in conjunction with multiple transmit antennas. In this paper we will demonstrate that the Recursive Least-Squares (RLS) algorithm is applicable to optimizing the predictors’ coefficients on a CIR-related tap-by-tap basis. Compared to ’robust’, non-adaptive approaches the proposed solution has the advantage of a potentially lower estimation MSE and a higher resilience to erroneous subcarrier symbol decisions.
50-54
Münster, M.
c7bbba92-827f-4a77-bdc2-fbed67caab36
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
2003
Münster, M.
c7bbba92-827f-4a77-bdc2-fbed67caab36
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Münster, M. and Hanzo, L.
(2003)
RLS-Adaptive Parallel Interference Cancellation Assisted Decision-directed Channel Estimation for OFDM.
of WCNC'2003, New Orleans, Louisiana, United States.
17 - 19 Mar 2003.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Abstract—OFDM systems employing multiple transmit antennas have recently drawn wide interest in the context of both space-time coded- and multi-user space-division multiple access (SDMA) arrangements. A prerequisite for using coherent detection at the receiver is the availability of reliable channel transfer factor estimates. Robust parallel interference cancellation (PIC) assisted decision-directed channel estimation (DDCE) has been shown in the literature to be also applicable to scenarios, where the number of users is in excess of the number of OFDM subcarriers - normalized to the number of Channel Impulse Response (CIR) related taps to be estimated - which imposed a limitation in the context of least-squares assisted DDCE techniques invoked in conjunction with multiple transmit antennas. In this paper we will demonstrate that the Recursive Least-Squares (RLS) algorithm is applicable to optimizing the predictors’ coefficients on a CIR-related tap-by-tap basis. Compared to ’robust’, non-adaptive approaches the proposed solution has the advantage of a potentially lower estimation MSE and a higher resilience to erroneous subcarrier symbol decisions.
Text
mm-lh-wcnc03.pdf
- Other
More information
Published date: 2003
Additional Information:
Event Dates: 17-19 March 2003
Venue - Dates:
of WCNC'2003, New Orleans, Louisiana, United States, 2003-03-17 - 2003-03-19
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 258367
URI: http://eprints.soton.ac.uk/id/eprint/258367
PURE UUID: c5b84de1-dc09-4742-8e50-aa382160df85
Catalogue record
Date deposited: 23 Oct 2003
Last modified: 18 Mar 2024 02:33
Export record
Contributors
Author:
M. Münster
Author:
L. Hanzo
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