Inter-Symbol Interference Mitigation in High-Data-Rate UWB Systems

Lottici, Vincenzo; Wu, Longwen; Tian, Zhi

doi:10.1109/icc.2007.709

Cited by 9 publications

(8 citation statements)

References 19 publications

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“…As a conclusions from different literature studies about the effects of interferences on UWB systems in literature [19]- [21], ISI increases as PRI decreases and the effect of intra-symbol interference and co-channel interference increase as m increase. Thus, settings of high m and short PRI are more susceptible to interference, which result in limitation on performance regardless of Eb/No.…”

Section: Ir-uwb In Adaptive Sensor Tagmentioning

confidence: 92%

Link Budget Design with Performance Evaluation of Tunable Impulse-Based Ultra Wideband to Support the Integration of Wireless Sensing and Identifications Infrastructures

Jawad¹,

Ismail²,

Hajjawi³

et al. 2014

JST

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Recently, many studies propose the use of ultra-wideband technology for passive and active radio frequency identification systems as well as for wireless sensor networks due to its numerous advantages. By harvesting these advantages of IR-UWB technology at the physical-layer design, this paper proposes that a cross layer architecture platform can be considered as a good integrator for different wireless short-ranges indoor protocols into a universal smart wireless-tagged architecture with new promising applications in cognitive radio for future applications. Adaptive transmission algorithms have been studied to show the trade-off between different specific QoS requirements, transmission rates and distances at the physical layer level and this type of dynamic optimization and reconfiguration leads to the cross-layer design proposal in the paper. Studies from both theoretical simulation and statistical indoor environments experiments are considered as a proof of concept for the proposed architecture.

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Section: Ir-uwb In Adaptive Sensor Tagmentioning

confidence: 92%

Link Budget Design with Performance Evaluation of Tunable Impulse-Based Ultra Wideband to Support the Integration of Wireless Sensing and Identifications Infrastructures

Jawad¹,

Ismail²,

Hajjawi³

et al. 2014

JST

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“…Non-coherent energy detection receiver is far less complex as a few components like shottky diodes and capacitors suffice. Nevertheless transmitting impulses at high data rate causes inter-symbol interference [4], [5], [6] which could seriously decrease the performances of a simple energy detector.…”

Section: Introductionmentioning

confidence: 99%

Chi-squared distribution approximation for probabilistic energy equalizer implementation in impulse-radio UWB receiver

Mekki

Danger

Miscopein

et al. 2008

2008 11th IEEE Singapore International Conference on Communication Systems

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Abstract-This paper addresses the hardware implementation feasibility assessment of a probabilistic energy equalizer for UWB impulse radio (IR) transmission. The receiver is based on energy detection and targets data rates greater than 100Mbps. The aim of this study is to bypass certain complex mathematical functions like the chi-squared (χ 2 ) distribution and approximate it by functions easier to implement. Fixed point data types simulations are achieved and compared to the results obtained from the reference floating point non-approximated function. Simulation results, under IEEE 802.15.3a channel models , confirm our choice which allows an easy hardware implementation for these complex functions.

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“…A number of algorithms have recently been developed to address the IFI/ISI mitigation problem for noncoherent UWB-IR. These algorithms mainly focus on equalization [7], [15], [16] and multiple-symbol detection (MSD) or maximumlikelihood sequence estimation (MLSE) [7], [17], [18]. More specifically, an ED-based decision feedback equalizer is proposed in [15] for the on/off-keying-modulated UWB-IR.…”

Section: Introductionmentioning

confidence: 99%

“…Aside from equalization, MSD or MLSE is proposed in [7] with full channel-state information (CSI) and in [17] with partial CSI. A multiple-symbol differential detection scheme is derived in [18] based on the generalized-likelihood ratio test approach [19]. No more training or estimation for CSI is needed in [18]; however, the Viterbi algorithm that was used for detection still increases the complexity of the receiver.…”

Section: Introductionmentioning

confidence: 99%

“…A multiple-symbol differential detection scheme is derived in [18] based on the generalized-likelihood ratio test approach [19]. No more training or estimation for CSI is needed in [18]; however, the Viterbi algorithm that was used for detection still increases the complexity of the receiver. In summary, the aforementioned equalization and MSD or MLSE schemes either need CSI estimation or heavily rely on signal processing after the nonlinear detector at the back end of the receiver, which inevitably results in relatively high implementation complexity at the receiver.…”

Section: Introductionmentioning

confidence: 99%

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IFI and ISI Premitigation for Block-Code-Modulated Noncoherent UWB Impulse Radio: A Code Optimization Approach

Gao

et al. 2012

IEEE Trans. Veh. Technol.

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Abstract-Codeword matching and signal aggregation (CMSA) is a recently proposed low-complexity noncoherent receiver for block-code-modulated ultrawideband impulse radio (UWB-IR) systems. As the frame/symbol duration is shortened to boost data rate, interframe interference (IFI) or intersymbol interference (ISI) occurs and degrades the detection performance of CMSA. In this paper, an effective IFI/ISI premitigation scheme is proposed for CMSA through a code optimization approach. By employing a tailored interference model that highlights the codeword properties, the system performance in the presence of moderate IFI/ISI is evaluated, and the average collected channel gain is introduced as the metric for code optimization. With the primary focus on binary modulation, the following two IFI/ISI-robust code properties are generalized: 1) shifted orthogonality and 2) shifted repetition. Based on these properties, the optimal code is constructed. It is observed that, when the optimal code occurs, the leaked signal energy or the interference can partially be used to enhance the detection performance of CMSA in the presence of IFI/ISI. Unlike most of the existing IFI/ISI mitigation schemes for noncoherent UWB-IR, which mainly focus on signal processing after the nonlinear detector, the optimized code is exploited to aggregate the leaked signal energy, along with the linear predetection operation already involved in the CMSA receiver. Both analysis and simulation show that a distinct performance improvement is achieved.Index Terms-Block code (BC) modulation, interframe interference (IFI), intersymbol interference (ISI), noncoherent, premitigation, ultrawideband impulse radio (UWB-IR).

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Inter-Symbol Interference Mitigation in High-Data-Rate UWB Systems

Cited by 9 publications

References 19 publications

Link Budget Design with Performance Evaluation of Tunable Impulse-Based Ultra Wideband to Support the Integration of Wireless Sensing and Identifications Infrastructures

Link Budget Design with Performance Evaluation of Tunable Impulse-Based Ultra Wideband to Support the Integration of Wireless Sensing and Identifications Infrastructures

Chi-squared distribution approximation for probabilistic energy equalizer implementation in impulse-radio UWB receiver

IFI and ISI Premitigation for Block-Code-Modulated Noncoherent UWB Impulse Radio: A Code Optimization Approach

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