Adaptive RAKE Receivers with Subspace-Based Hadamard-Hermite Template Design for UWB Communications

Craig J. MITCHELL; Giuseppe ABREU; Ryuji KOHNO

doi:10.1093/ietfec/e88-a.9.2327

Adaptive RAKE Receivers with Subspace-Based Hadamard-Hermite Template Design for UWB Communications

Craig J. MITCHELL, Giuseppe ABREU, Ryuji KOHNO

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In this paper we present a novel method for improving RAKE receiver reception in UWB systems. Due to the fact that practical pulses that can be produced for UWB-IR (Ultra Wideband-Impulse Radio) may occupy a longer time than the typical multipath resolution of the actual UWB channel, multiple channel components may arrive within this typical pulse width. Performance degradation may occur due to the resulting intrapulse (overlapping received pulses) interference. We here propose an adaptive, pilot aided RAKE receiver for UWB communications in the multipath environment. The proposed system estimates the actual received signal with intrapulse interference in each RAKE finger using projections onto a Hadamard-Hermite subspace. By exploiting the orthogonality of this subspace it is possible to decompose the received signal so as to better match the template waveform and reduce the effects of intrapulse interference. By using the projections onto this subspace, the dimension of the received signal is effectively increased allowing for adaptive correlator template outputs. RAKE receivers based on this proposal are designed which show significant performance improvement and require less fingers to achieve required performance than their conventional counterparts.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E88-A No.9 pp.2327-2338

Publication Date: 2005/09/01

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DOI: 10.1093/ietfec/e88-a.9.2327

Type of Manuscript: Special Section PAPER (Special Section on Ultra Wideband Systems)

Category: RAKE Receiver

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Craig J. MITCHELL, Giuseppe ABREU, Ryuji KOHNO, "Adaptive RAKE Receivers with Subspace-Based Hadamard-Hermite Template Design for UWB Communications" in IEICE TRANSACTIONS on Fundamentals, vol. E88-A, no. 9, pp. 2327-2338, September 2005, doi: 10.1093/ietfec/e88-a.9.2327.
Abstract: In this paper we present a novel method for improving RAKE receiver reception in UWB systems. Due to the fact that practical pulses that can be produced for UWB-IR (Ultra Wideband-Impulse Radio) may occupy a longer time than the typical multipath resolution of the actual UWB channel, multiple channel components may arrive within this typical pulse width. Performance degradation may occur due to the resulting intrapulse (overlapping received pulses) interference. We here propose an adaptive, pilot aided RAKE receiver for UWB communications in the multipath environment. The proposed system estimates the actual received signal with intrapulse interference in each RAKE finger using projections onto a Hadamard-Hermite subspace. By exploiting the orthogonality of this subspace it is possible to decompose the received signal so as to better match the template waveform and reduce the effects of intrapulse interference. By using the projections onto this subspace, the dimension of the received signal is effectively increased allowing for adaptive correlator template outputs. RAKE receivers based on this proposal are designed which show significant performance improvement and require less fingers to achieve required performance than their conventional counterparts.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e88-a.9.2327/_p

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@ARTICLE{e88-a_9_2327,
author={Craig J. MITCHELL, Giuseppe ABREU, Ryuji KOHNO, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Adaptive RAKE Receivers with Subspace-Based Hadamard-Hermite Template Design for UWB Communications},
year={2005},
volume={E88-A},
number={9},
pages={2327-2338},
abstract={In this paper we present a novel method for improving RAKE receiver reception in UWB systems. Due to the fact that practical pulses that can be produced for UWB-IR (Ultra Wideband-Impulse Radio) may occupy a longer time than the typical multipath resolution of the actual UWB channel, multiple channel components may arrive within this typical pulse width. Performance degradation may occur due to the resulting intrapulse (overlapping received pulses) interference. We here propose an adaptive, pilot aided RAKE receiver for UWB communications in the multipath environment. The proposed system estimates the actual received signal with intrapulse interference in each RAKE finger using projections onto a Hadamard-Hermite subspace. By exploiting the orthogonality of this subspace it is possible to decompose the received signal so as to better match the template waveform and reduce the effects of intrapulse interference. By using the projections onto this subspace, the dimension of the received signal is effectively increased allowing for adaptive correlator template outputs. RAKE receivers based on this proposal are designed which show significant performance improvement and require less fingers to achieve required performance than their conventional counterparts.},
keywords={},
doi={10.1093/ietfec/e88-a.9.2327},
ISSN={},
month={September},}

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TY - JOUR
TI - Adaptive RAKE Receivers with Subspace-Based Hadamard-Hermite Template Design for UWB Communications
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2327
EP - 2338
AU - Craig J. MITCHELL
AU - Giuseppe ABREU
AU - Ryuji KOHNO
PY - 2005
DO - 10.1093/ietfec/e88-a.9.2327
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E88-A
IS - 9
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - September 2005
AB - In this paper we present a novel method for improving RAKE receiver reception in UWB systems. Due to the fact that practical pulses that can be produced for UWB-IR (Ultra Wideband-Impulse Radio) may occupy a longer time than the typical multipath resolution of the actual UWB channel, multiple channel components may arrive within this typical pulse width. Performance degradation may occur due to the resulting intrapulse (overlapping received pulses) interference. We here propose an adaptive, pilot aided RAKE receiver for UWB communications in the multipath environment. The proposed system estimates the actual received signal with intrapulse interference in each RAKE finger using projections onto a Hadamard-Hermite subspace. By exploiting the orthogonality of this subspace it is possible to decompose the received signal so as to better match the template waveform and reduce the effects of intrapulse interference. By using the projections onto this subspace, the dimension of the received signal is effectively increased allowing for adaptive correlator template outputs. RAKE receivers based on this proposal are designed which show significant performance improvement and require less fingers to achieve required performance than their conventional counterparts.
ER -