Performance of low-complexity RAKE reception in a realistic UWB channel

Cassioli, Dajana; Win, Moe Z.; Vatalaro, Francesco; Molisch, Andreas F.

doi:10.1109/icc.2002.996958

Cited by 299 publications

(172 citation statements)

References 20 publications

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“…This follows from (17) and from the definition (16) of R * i . Thus, under the relaxed power constraint (15), it is sufficient for each source-destination pair i to choose the minimum power route R * i to route all its traffic, so as to maximize its rate.…”

Section: A Traffic Routingmentioning

confidence: 83%

“…However, recent changes in U.S. federal regulations have opened up UWB for commercial applications. Thus, there are currently intense research and development efforts underway, to design and standardize commercial UWB radios [16], [17], [18]. For example, the UWB based IEEE 802.15.3.a standard [19] is expected to support 100 to 500 Mbps depending on the link distance.…”

Section: Introductionmentioning

confidence: 99%

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Capacity of power constrained ad-hoc networks

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Abstract-Throughput capacity is a critical parameter for the design and evaluation of ad-hoc wireless networks. Consider n identical randomly located nodes, on a unit area, forming an adhoc wireless network. Assuming a fixed per node transmission capability of T bits per second at a fixed range, it has been shown that the uniform throughput capacity per node r(n) is Θ (log n) (α+1)/2 ) (achievable lower bound).These bounds demonstrate that throughput increases with node density n, in contrast to previously published results. This is the result of the large bandwidth, and the assumed power and rate adaptation, which alleviate interference. Thus, the significance of physical layer properties on the capacity of ad-hoc wireless networks is demonstrated.

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Section: A Traffic Routingmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Capacity of power constrained ad-hoc networks

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“…it holds that the absolute value of the second part is always smaller than 2 2 ( ') ( ' ) sin( ) ( ) 4 2 2 …”

Section: A T a T A T A T T A T A Tmentioning

confidence: 99%

“…Moreover, often a lot of rake fingers are required to accommodate the wireless channel, rendering it not favourable from an implementation point of view. Indeed low complexity rake receivers are being investigated [4].…”

Section: Introductionmentioning

confidence: 99%

A quadrature downconversion autocorrelation receiver architecture for UWB

Lee

Bagga

Serdijn

2004 International Workshop on Ultra Wideband Systems Joint With Conference on Ultra Wideband Systems and Technologies. Joint U

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In this paper, a new UWB receiver architecture is proposed. Unlike a rake receiver, it does not suffer from the timing and template matching problems, and it circumvents processing at high frequencies, thereby reducing the on-chip circuit complexity and power consumption and offering simple but effective narrowband interference rejection. Simulations show that with current IC technology, the receiver only shows a slight, acceptable performance loss with respect to the ideal case.

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“…However, for a finite-complexity receiver, smaller spreading bandwidths might be preferable [16]- [19]. In a recent paper [20], we proposed simplified Rake receiver structures and analyzed their performance in UWB channels.…”

Section: Introductionmentioning

confidence: 99%

Effects of spreading bandwidth on the performance of UWB RAKE receivers

Cassioli¹,

Win

Vatalaro

et al.

IEEE International Conference on Communications, 2003. ICC '03.

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We consider an ultra-wide bandwidth system using reduced-complexity Rake receivers, which are based on either selective (called SRake) or partial (called PRake) combining of a subset of the available resolved multipath components. We investigate the influence of the spreading bandwidth on the system performance using the two considered types of Rake receivers. We show that, for a fix number of Rake fingers and a fix transmit power, there is an optimum bandwidth. This optimal bandwidth increases with the number of Rake fingers, and is higher for an SRake than for a PRake. We also investigate the effects of the fading statistics (Rayleigh or Nakagami) on the optimal spreading bandwidth. We find that the optimal spreading bandwidth is approximately the same for both types of fading, but that the actual performance of an SRake can be better or worse in Rayleigh fading (compared to Nakagami), depending on the spreading bandwidth and the number of fingers.This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Abstract-We consider an ultra-wide bandwidth system using reduced-complexity Rake receivers, which are based on either selective (called SRake) or partial (called PRake) combining of a subset of the available resolved multipath components. We investigate the influence of the spreading bandwidth on the system performance using the two considered types of Rake receivers. We show that, for a fix number of Rake fingers and a fix transmit power, there is an optimum bandwidth. This optimal bandwidth increases with the number of Rake fingers, and is higher for an SRake than for a PRake. We also investigate the effects of the fading statistics (Rayleigh or Nakagami) on the optimal spreading bandwidth. We find that the optimal spreading bandwidth is approximately the same for both types of fading, but that the actual performance of an SRake can be better or worse in Rayleigh fading (compared to Nakagami), depending on the spreading bandwidth and the number of fingers.

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Performance of low-complexity RAKE reception in a realistic UWB channel

Cited by 299 publications

References 20 publications

Capacity of power constrained ad-hoc networks

Capacity of power constrained ad-hoc networks

A quadrature downconversion autocorrelation receiver architecture for UWB

Effects of spreading bandwidth on the performance of UWB RAKE receivers

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