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RLS-Adaptive Parallel Interference Cancellation Assisted Decision-directed Channel Estimation for OFDM

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
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, United States. 17 - 19 Mar 2003. pp. 50-54 .

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.

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More information

Published date: 2003
Additional Information: Event Dates: 17-19 March 2003
Venue - Dates: of WCNC'2003, 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
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 23 Oct 2003
Last modified: 26 Nov 2019 02:06

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Contributors

Author: M. Münster
Author: L. Hanzo ORCID iD

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