On Sphere Detection and Minimum-Phase Prefiltered Reduced-State Sequence Estimation

Morten Hansen; Lars P.B. Christensen; Ole Winther

doi:10.1109/GLOCOM.2007.806

On Sphere Detection and Minimum-Phase Prefiltered Reduced-State Sequence Estimation

Morten Hansen, Lars P.B. Christensen, Ole Winther

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

In this paper, prefiltering techniques for Sphere Detection (SD) in frequency-selective channels are examined. It is shown that a link between QL-factorization of the channel matrix and minimum-phase prefiltering exists. As a result, it ispossible to regard SD as a generalization of traditional reducedstate sequence estimation, providing a unifying framework for the two detection methods. It is illustrated how minimum-phase prefiltering or the Linear Minimum Mean-Square Error Decision Feedback Equalization (LMMSE-DFE) forward filter is capable of reducing the complexity of sphere detectors significantly, while still obtaining near-optimal performance. The significant reduction in complexity is obtained as prefiltering enables earlier decision making in SD. Simulations carried out in an EDGE system confirm that prefiltering leads to a considerable complexity reduction for sphere detectors.

Original language	English
Title of host publication	Global Telecommunications Conference, GLOBECOM '07. IEEE, 26-30 Nov. 2007
Publisher	IEEE
Publication date	2007
Pages	4237-4241
ISBN (Print)	978-1-4244-1043-9
DOIs	https://doi.org/10.1109/GLOCOM.2007.806
Publication status	Published - 2007
Event	Global Telecommunications Conference, GLOBECOM '07. IEEE, 26-30 Nov. 2007 - Duration: 1 Jan 2007 → …

Conference

Conference	Global Telecommunications Conference, GLOBECOM '07. IEEE, 26-30 Nov. 2007
Period	01/01/2007 → …

Bibliographical note

Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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title = "On Sphere Detection and Minimum-Phase Prefiltered Reduced-State Sequence Estimation",

abstract = "In this paper, prefiltering techniques for Sphere Detection (SD) in frequency-selective channels are examined. It is shown that a link between QL-factorization of the channel matrix and minimum-phase prefiltering exists. As a result, it ispossible to regard SD as a generalization of traditional reducedstate sequence estimation, providing a unifying framework for the two detection methods. It is illustrated how minimum-phase prefiltering or the Linear Minimum Mean-Square Error Decision Feedback Equalization (LMMSE-DFE) forward filter is capable of reducing the complexity of sphere detectors significantly, while still obtaining near-optimal performance. The significant reduction in complexity is obtained as prefiltering enables earlier decision making in SD. Simulations carried out in an EDGE system confirm that prefiltering leads to a considerable complexity reduction for sphere detectors.",

author = "Morten Hansen and Christensen, {Lars P.B.} and Ole Winther",

note = "Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; Global Telecommunications Conference, GLOBECOM '07. IEEE, 26-30 Nov. 2007 ; Conference date: 01-01-2007",

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doi = "10.1109/GLOCOM.2007.806",

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AU - Christensen, Lars P.B.

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N2 - In this paper, prefiltering techniques for Sphere Detection (SD) in frequency-selective channels are examined. It is shown that a link between QL-factorization of the channel matrix and minimum-phase prefiltering exists. As a result, it ispossible to regard SD as a generalization of traditional reducedstate sequence estimation, providing a unifying framework for the two detection methods. It is illustrated how minimum-phase prefiltering or the Linear Minimum Mean-Square Error Decision Feedback Equalization (LMMSE-DFE) forward filter is capable of reducing the complexity of sphere detectors significantly, while still obtaining near-optimal performance. The significant reduction in complexity is obtained as prefiltering enables earlier decision making in SD. Simulations carried out in an EDGE system confirm that prefiltering leads to a considerable complexity reduction for sphere detectors.

AB - In this paper, prefiltering techniques for Sphere Detection (SD) in frequency-selective channels are examined. It is shown that a link between QL-factorization of the channel matrix and minimum-phase prefiltering exists. As a result, it ispossible to regard SD as a generalization of traditional reducedstate sequence estimation, providing a unifying framework for the two detection methods. It is illustrated how minimum-phase prefiltering or the Linear Minimum Mean-Square Error Decision Feedback Equalization (LMMSE-DFE) forward filter is capable of reducing the complexity of sphere detectors significantly, while still obtaining near-optimal performance. The significant reduction in complexity is obtained as prefiltering enables earlier decision making in SD. Simulations carried out in an EDGE system confirm that prefiltering leads to a considerable complexity reduction for sphere detectors.

U2 - 10.1109/GLOCOM.2007.806

DO - 10.1109/GLOCOM.2007.806

M3 - Article in proceedings

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BT - Global Telecommunications Conference, GLOBECOM '07. IEEE, 26-30 Nov. 2007

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