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Pilot contamination elimination for large-scale multiple-antenna aided OFDM systems

Pilot contamination elimination for large-scale multiple-antenna aided OFDM systems
Pilot contamination elimination for large-scale multiple-antenna aided OFDM systems
Pilot contamination constitutes a particularly significant impairment in large-scale multi-cell systems. We propose an effective pilot contamination elimination scheme for multi-cell time division duplexing based orthogonal frequency division multiplexing systems, by carefully designing a sophisticated amalgam of downlink (DL) training and ‘scheduled’ uplink (UL) training. During the DL training stage, each base station (BS) transmits the DL pilot symbols (PSs) to its mobile stations (MSs) for them to estimate their frequency-domain channel transfer functions (FDCHTFs), which are then embedded in the UL PSs by ‘predistorting’ the PSs with the estimated FDCHTFs. During the scheduled UL training, each BS’s UL receiver in turn extracts the FDCHTFs of its MSs from their received PSs by eliminating the pilot contamination imposed by the simultaneously transmitted UL PSs of all other cells. Our simulation results demonstrate that the pilot contamination is completely eliminated by the proposed scheme, even for the network consisting of a large number of unity frequency reuse cells. Most significantly, unlike many existing pilot contamination reduction schemes, our scheme does not rely on the assumption that each BS knows the secondorder statistics of all the interfering UL channels.
759-772
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Zhang, Bo
b4357fc4-109b-4499-a865-ad0b2386c076
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Mu, Xiaomin
3d578909-36ba-4b16-b703-2ef63532116c
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Zhang, Bo
b4357fc4-109b-4499-a865-ad0b2386c076
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Mu, Xiaomin
3d578909-36ba-4b16-b703-2ef63532116c
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Zhang, Jiankang, Zhang, Bo, Chen, Sheng, Mu, Xiaomin, El-Hajjar, Mohammed and Hanzo, L. (2014) Pilot contamination elimination for large-scale multiple-antenna aided OFDM systems [in special issue: Signal Processing for Large-Scale MIMO Communications] IEEE Journal of Selected Topics in Signal Processing, 8, (5), pp. 759-772.

Record type: Article

Abstract

Pilot contamination constitutes a particularly significant impairment in large-scale multi-cell systems. We propose an effective pilot contamination elimination scheme for multi-cell time division duplexing based orthogonal frequency division multiplexing systems, by carefully designing a sophisticated amalgam of downlink (DL) training and ‘scheduled’ uplink (UL) training. During the DL training stage, each base station (BS) transmits the DL pilot symbols (PSs) to its mobile stations (MSs) for them to estimate their frequency-domain channel transfer functions (FDCHTFs), which are then embedded in the UL PSs by ‘predistorting’ the PSs with the estimated FDCHTFs. During the scheduled UL training, each BS’s UL receiver in turn extracts the FDCHTFs of its MSs from their received PSs by eliminating the pilot contamination imposed by the simultaneously transmitted UL PSs of all other cells. Our simulation results demonstrate that the pilot contamination is completely eliminated by the proposed scheme, even for the network consisting of a large number of unity frequency reuse cells. Most significantly, unlike many existing pilot contamination reduction schemes, our scheme does not rely on the assumption that each BS knows the secondorder statistics of all the interfering UL channels.

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More information

Accepted/In Press date: 22 February 2014
e-pub ahead of print date: 5 March 2014
Published date: 1 October 2014
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 362680
URI: http://eprints.soton.ac.uk/id/eprint/362680
PURE UUID: aac73959-4963-4d85-8f72-51b4051576a2
ORCID for Jiankang Zhang: ORCID iD orcid.org/0000-0001-5316-1711
ORCID for Mohammed El-Hajjar: ORCID iD orcid.org/0000-0002-7987-1401
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 04 Mar 2014 15:29
Last modified: 04 Oct 2017 06:09

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Contributors

Author: Jiankang Zhang ORCID iD
Author: Bo Zhang
Author: Sheng Chen
Author: Xiaomin Mu
Author: Mohammed El-Hajjar ORCID iD
Author: L. Hanzo ORCID iD

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