Increasing the Efficiency of Rake Receivers for Ultra-Wideband Applications

Doukeli, Aimilia P.; Lioumpas, Athanasios S.; Karagiannidis, George K.; Frangos, Panayiotis

doi:10.1007/s11277-010-0090-9

Cited by 11 publications

(9 citation statements)

References 18 publications

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“…As shown in Figure 8 a, the performance of the S-rake and P-rake is similar at a high-frequency channel, while the S-rake significantly outperforms the P-rake at a low-frequency channel. In addition, adaptive P-rake and S-rake receivers were proposed by Doukeli [ 54 ], and can be applied in the UWB physical layer. In the proposed receivers, the number of combined paths can be reduced by comparing the SNR quality of each path.…”

Section: Receivermentioning

confidence: 99%

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The Development and Progress of the UWB Physical Layer

Chen

et al. 2022

Micromachines

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Ultra-wideband (UWB) technology has been applied in many fields, such as radar and indoor positioning, because of its advantages of having a high transmission rate, anti-multipath interference, and good concealment. In the UWB physical layer, the transmitting link, including an encoder and a pulse generator, is used to improve the anti-interference ability of the signal, while the receiving link, including a receiver and a decoder, can correct the error signal. Therefore, the performance of the UWB physical layer can obviously affect the speed and quality of UWB signal transmission. In this paper, the structure and performance of the codec and transceiver of the UWB physical layer are introduced and compared. In addition, some typical architectures and features are summarized and discussed, which provides a valuable reference and suggestions for the design of the UWB physical layer. Finally, the outlook of the UWB physical layer is presented: its development direction mainly includes high speed, low power consumption, and fewer hardware resources.

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Section: Receivermentioning

confidence: 99%

“…( b ) BEP for the case of the LF channel model. (Reprinted from [ 54 ], Copyright 2012, with permission from Springer). ( c ) UWB rake−MMSE−equalizer structure and performance of UWB rake−MMSE−receiver for different number of equalizer taps and rake fingers.…”

Section: Receivermentioning

confidence: 99%

The Development and Progress of the UWB Physical Layer

Chen

et al. 2022

Micromachines

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“…MUI and ISI degrade the performance of multiuser detectors when communicating over UWB channels, and Hung and Chen [8] proposed Hopfield neural networks to reduce the computational complexity and to mitigate interference. Simulations in [9] were conducted using line-of-sight (LOS) paths and non-line-of-sight (NLOS) paths for adaptive selective-rake and adaptive partial-rake receivers, and the performance of these two receiver structures was investigated. Increasing the average received SNR was achieved by [10] by combining the selected strongest paths from several clusters with the first paths arriving in a limited duration out of the resolved MPCs.…”

Section: Introductionmentioning

confidence: 99%

Pulse Sign Separation Technique for the Received Bits in Wireless Ultra‐Wideband Combination Approach

Fayadh

Malek

Fadhil

2014

Mathematical Problems in Engineering

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When receiving high data rate in ultra-wideband (UWB) technology, many users have experienced multiple-user interference and intersymbol interference in the multipath reception technique. Structures have been proposed for implementing rake receivers to enhance their capabilities by reducing the bit error probability ( ), thereby providing better performances by indoor and outdoor multipath receivers. As a result, several rake structures have been proposed in the past to reduce the number of resolvable paths that must be estimated and combined. To achieve this aim, we suggest two maximal ratio combiners based on the pulse sign separation technique, such as the pulse sign separation selective combiner (PSS-SC) and the pulse sign separation partial combiner (PSS-PC) to reduce complexity with fewer fingers and to improve the system performance. In the combiners, a comparator was added to compare the positive quantity of positive pulses and negative quantities of negative pulses to decide whether the transmitted bit was 1 or 0. The was driven by simulation for multipath environments for impulse radio time-hopping binary phase shift keying (TH-BPSK) modulation, and the results were compared with those of conventional selective combiners (C-SCs) and conventional partial combiners (C-PCs).

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“…This algorithm is referred to using the acronym Rake-LMMSE [23,24]. In the case of Single Input Single Output SISO channel where all users transmit on a single channel only the matrix…”

mentioning

confidence: 99%

UWB System Based on the Modified Gegenbauer Function in MISO Channel

m’foubat¹,

Tatkeu²,

Elbahhar³

2013

WET

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In this paper, we propose a new multi-user Rake receiver, based on the interference mutualization with a matrix representation for Multiple Input Single Output MISO channel. The proposed system used the Modified Gegenbauer functions in order to generate the signal and to ensure the multi users transmission system. The new proposed receiver allows, using the temporal and special diversity, to avoid the interferences between symbols and to improve the system performances in terms of Bit Error Rate BER and interferences between users with a low algorithm complexity. The proposed solution is based on the classical Rake receiver associated with the equalizer receiver. In order to adapt the Rake approach, in single detection case and in multi users Ultra Wide Band environment, we propose a multi-user Rake receiver using the matrix form. Our proposed system is evaluated in terms of channel effects and multi users’ interferences.

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Increasing the Efficiency of Rake Receivers for Ultra-Wideband Applications

Cited by 11 publications

References 18 publications

The Development and Progress of the UWB Physical Layer

The Development and Progress of the UWB Physical Layer

Pulse Sign Separation Technique for the Received Bits in Wireless Ultra‐Wideband Combination Approach

UWB System Based on the Modified Gegenbauer Function in MISO Channel

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