Spectral efficient IR-UWB communication design for low complexity transceivers

Yajnanarayana, Vijaya; Dwivedi, Satyam; Angelis, Alessio De; Händel, Peter

doi:10.1186/1687-1499-2014-158

Cited by 8 publications

(11 citation statements)

References 22 publications

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“…Since many technologies like UWB use extremely large bandwidths, they can be used for precise range estimation. Practical UWB hardware with ranging and communication capabilities with range estimation accuracy of a few centimeters are discussed in [47], [48]. In practice, clock synchronization is not perfect and there will be range errors.…”

Section: Effect Of Syncronization and Range Errorsmentioning

confidence: 99%

Optimal Scheduling for Interference Mitigation by Range Information

Yajnanarayana

Magnusson

Brandt

et al. 2017

IEEE Trans. on Mobile Comput.

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Abstract-The multiple access scheduling decides how the channel is shared among the nodes in the network. Typical scheduling algorithms aims at increasing the channel utilization and thereby throughput of the network. This paper describes several algorithms for generating an optimal schedule in terms of channel utilization for multiple access by utilizing range information in a fully connected network. We also provide detailed analysis for the proposed algorithms performance in terms of their complexity, convergence, and effect of nonidealities in the network. The performance of the proposed schemes are compared with non-aided methods to quantify the benefits of using the range information in the communication. The proposed methods have several favorable properties for the scalable systems. We show that the proposed techniques yields better channel utilization and throughput as the number of nodes in the network increases. We provide simulation results in support of this claim. The proposed methods indicate that the throughput can be increased on average by 3 − 10 times for typical network configurations.

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Section: Effect Of Syncronization and Range Errorsmentioning

confidence: 99%

Optimal Scheduling for Interference Mitigation by Range Information

Yajnanarayana

Magnusson

Brandt

et al. 2017

IEEE Trans. on Mobile Comput.

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“…single-path LOS channels for distances less than 100 meters. For the transceiver operating in the frequency band less than 10 GHz, due to higher reflections, refractions and scattering characteristics of the channel, the assumptions of single-path LOS channel is valid only for extremely short distance of order less than 10 meters [3], [5], [9], [10]. These short distance high speed UWB applications include transferjet and wireless USB (wUSB) [11], [12].…”

Section: System Modelmentioning

confidence: 99%

“…IR-UWB schemes employ narrow impulse signals, which can yield high time resolution, and hence can be used for accurate position localization and ranging. Narrow pulse duration coupled with low amplitude due to the restriction from regulatory agencies like Federal Communications Commission (FCC) makes the detection of these pulses challenging [2], [3]. Generally, transmit signaling employs multiple pulses and the receiver aggregates certain characteristics from these pulses like energy, amplitude, position, etc., to make statistical inferences on the transmitted information like range (localization) or transmitted symbol value (communication) etc.…”

Section: Introductionmentioning

confidence: 99%

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IR-UWB detection and fusion strategies using multiple detector types

Yajnanarayana

Dwivedi

Händel

2016

2016 IEEE Wireless Communications and Networking Conference

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Abstract-Optimal detection of ultra wideband (UWB) pulses in a UWB transceiver employing multiple detector types is proposed and analyzed in this paper. To enable the transceiver to be used for multiple applications, the designers have different types of detectors such as energy detector, amplitude detector, etc., built in to a single transceiver architecture. We propose several fusion techniques for fusing decisions made by individual IR-UWB detectors. In order to get early insight into theoretical achievable performance of these fusion techniques, we assess the performance of these fusion techniques for commonly used detector types like matched filter, energy detector and amplitude detector under Gaussian assumption. These are valid for ultra short distance communication and in UWB systems operating in millimeter wave (mmwave) band with high directivity gain. In this paper, we utilize the performance equations of different detectors, to device distinct fusion algorithms. We show that the performance can be improved approximately by 4 dB in terms of signal to noise ratio (SNR) for high probability of detection of a UWB signal (> 95%), by fusing decisions from multiple detector types compared to a standalone energy detector, in a practical scenario.

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“…In previous research [1,7,8], the behaviour of simulations with FFT-based PSD estimation of UWB signals was analysed by comparing the results with analytical and actual measurements. This paper is an extension of such works, whereby a comparison between the proposed and existing systems is introduced.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Bitrate and Power Spectral Density of PPM TH-IR UWB Signals using a Sub-Slot Technique

Moh’d¹,

Qasem²

2020

IJACSA

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Increasing the receiver's bitrate and suppressing the spectral line are issues of major interest in the design of compliant Time-Hopping Impulse Radio (TH-IR) Ultra-Wide Band (UWB) systems. Suppression of spectral lines has been commonly addressed by randomizing the position of each pulse to make the period as large as possible. Our analysis suggests that this influences the overall shape of a signal's Power Spectral Density (PSD) in a way that is useful for spectral line suppression or diminishing the PSD maximum peak power. A method for utilizing the system to generate a Dynamic-Location Pulse-Position Modulated (DLPPM) signal for transmission across a UWB communications channel is presented, and an analytical derivation of the PSD of a proposed DLPPM signal TH-IR UWB is introduced. Our proposed method can be applied without affecting the users of other concurrent applications. The theoretical model for DPLM TH-IR is compared with the PSD for conventional DPLM TH-IR. The results show that spectral estimation methods based on Fast Fourier Transform (FFT) significantly overestimate the continuous part of the PSD for small and medium signal lengths, which has implications for assessing interference margins by means of simulation. Another purpose of this paper is to improve a predesigned system by increasing the receiver's bitrate. This will be achieved by using the bits that control the sub-slot technique as information and designing a receiver capable of detecting them. The bitrate is effectively doubled. Finally, the proposed system for DPLM TH-IR has been built inside Simulink/MATLAB to test its results via a conventional DPLM TH-IR system.

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Spectral efficient IR-UWB communication design for low complexity transceivers

Cited by 8 publications

References 22 publications

Optimal Scheduling for Interference Mitigation by Range Information

Optimal Scheduling for Interference Mitigation by Range Information

IR-UWB detection and fusion strategies using multiple detector types

Enhancing the Bitrate and Power Spectral Density of PPM TH-IR UWB Signals using a Sub-Slot Technique

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