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Decision Directed Channel Estimation Employing Projection Approximation Subspace Tracking

Decision Directed Channel Estimation Employing Projection Approximation Subspace Tracking
Decision Directed Channel Estimation Employing Projection Approximation Subspace Tracking
The attainable capacity and integrity of a state-of-the-art broadband multi-carrier communication system is highly sensitive to the accuracy of the information available concerning the channel conditions encountered. The majority of existing advanced channel estimation schemes assume knowledge of the channel’s Power Delay Profile (PDP) in order to estimate the corresponding instanteneous Channel Impulse Response (CIR). It is evident however that in realistic mobile channels, where at least one of the communicating terminals is in motion, the power delay profile will also be time-variant and thus may not be known a priori at the receiver. In this paper we propose a decision directed channel estimation scheme employing the so-called Projection Approximation Subspace Tracking (PAST) algorithm. The PAST algorithm is utilised for the sake of achieving low-complexity recursive tracking of the channel’s PDP. The achievable perormance of the proposed method is documented in the context of an OFDM system communicating in realistic channel conditions characterized by a time-variant fractionally-spaced PDP.
3056-3060
Akhtman, J.
d4fd2b26-c123-463d-847c-80adc83a89fa
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Akhtman, J.
d4fd2b26-c123-463d-847c-80adc83a89fa
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Akhtman, J. and Hanzo, L. (2007) Decision Directed Channel Estimation Employing Projection Approximation Subspace Tracking. IEEE VTC'07 (Spring). 22 - 25 Apr 2007. pp. 3056-3060 .

Record type: Conference or Workshop Item (Paper)

Abstract

The attainable capacity and integrity of a state-of-the-art broadband multi-carrier communication system is highly sensitive to the accuracy of the information available concerning the channel conditions encountered. The majority of existing advanced channel estimation schemes assume knowledge of the channel’s Power Delay Profile (PDP) in order to estimate the corresponding instanteneous Channel Impulse Response (CIR). It is evident however that in realistic mobile channels, where at least one of the communicating terminals is in motion, the power delay profile will also be time-variant and thus may not be known a priori at the receiver. In this paper we propose a decision directed channel estimation scheme employing the so-called Projection Approximation Subspace Tracking (PAST) algorithm. The PAST algorithm is utilised for the sake of achieving low-complexity recursive tracking of the channel’s PDP. The achievable perormance of the proposed method is documented in the context of an OFDM system communicating in realistic channel conditions characterized by a time-variant fractionally-spaced PDP.

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Published date: 2007
Additional Information: Event Dates: 22-25 April 2007
Venue - Dates: IEEE VTC'07 (Spring), 2007-04-22 - 2007-04-25
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 263932
URI: https://eprints.soton.ac.uk/id/eprint/263932
PURE UUID: 91a3cc19-bddf-4bf6-aca1-1787149354f4
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 25 Apr 2007
Last modified: 06 Jun 2018 13:14

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