Energy detection based blind synchronization for pulse shape modulated IR-UWB systems

Akbar, Rizwan; Rădoi, Emanuel; Azou, Stéphane

doi:10.1109/pimrc.2011.6140090

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Relying on periodic transmission of non-zero mean symbols, a group of joint timing and template recovery algorithms have been developed in [17]- [19], with universal applicability in the presence of ISI and MUI. Capitalizing on the fine correlation properties of binary codes, various algorithms have been proposed in [20], which provide much improved performance using fewer number of symbols which provide much improved performance using fewer number of symbols. The Timing with Code Matching is based on exploiting the discriminative nature of well-designed polarity codes and relies on code-matching [21]- [23].…”

Section: Background and Related Workmentioning

confidence: 99%

Preamble aided energy detection based synchronization in non-coherent UWB receivers

Begum

Sarma

2014

2014 International Conference on Signal Processing and Integrated Networks (SPIN)

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Synchronization is a significant performancelimiting factor in any communication system and a challenging task to accomplish. In this paper, an energy detection based on preamble non data aided (NDA) algorithm for impulse radio (IR) ultra wide-band (UWB) (IR-UWB) system is proposed. A simple preamble searching technique and tracking with energy detection enables synchronization. The algorithm remains functional under practical scenarios namely in the presence of inter-frame, intersymbol interference and multi-user interference (IFI and ISI and MUI). The simulation environment for IFI is carried out in the IEEE 802.15.3 channels, CM1 and the environment for ISI is chosen along CM4 channel. Simulation results are provided to demonstrate the performance of proposed algorithm. A comparative study of the same algorithm is further made with Timing with Dirty Template (TDT) and Timing with Code Matching (TCM) in terms of IFI, ISI and MUI environment.

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Section: Background and Related Workmentioning

confidence: 99%

Preamble aided energy detection based synchronization in non-coherent UWB receivers

Begum

Sarma

2014

2014 International Conference on Signal Processing and Integrated Networks (SPIN)

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“…In order to deal with these issues, we developed in [33] an energy detection-based synchronization (EDS) algorithm exploiting the first order averaging and a judiciously designed transmitted signal, in a way that by simple overlap-add operation followed by energy detection, one can estimate the synchronization time. This algorithm has the advantage of achieving synchronization with no a-priori knowledge and remains equally valid for higherorder PSM.…”

Section: Contributionsmentioning

confidence: 99%

Low-complexity synchronization algorithms for orthogonally modulated IR-UWB systems

Akbar

Rădoi

Azou

et al. 2013

J Wireless Com Network

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Timing synchronization is a major issue for any communication system since it is essential to ensure its stable operation and reliable performance. In this paper, we compare two low-complexity synchronization algorithms for impulse radio ultra-wideband (IR-UWB) system, employing orthogonal pulse shape modulation (PSM). The two widely adopted modulation schemes for IR-UWB systems are binary pulse amplitude modulation and binary pulse position modulation. However, the possibility of generating orthogonal UWB pulses in recent years has motivated the use of orthogonal PSM which is particularly attractive as high-order modulation and also due to its possible robustness against ISI, and therefore is the focus of this paper. Relying on the unique signal format, the first algorithm applies simple overlap-add operation followed by energy detection to achieve synchronization. This approach is semi non-data-aided (NDA) because a part of the signal is specifically reserved to help enable synchronization. The other algorithm, on the other hand, exploits the discriminating nature of well-designed polarity codes and employs a series of code word matching and averaging operations to achieve synchronization. This approach is full NDA as there is no need to interrupt the data transmission. Based on the judicious change in the phase of transmitted signal applied for synchronization purposes, the second algorithm can also be used to extract synchronized aggregate templates. These templates are then used in demodulation, resulting in a low-complexity non-coherent alternative to complex Rake receivers. The two compared timing algorithms rely on simple overlap-add operations and thus remain operational under practical UWB settings. Simulation results are provided to demonstrate the efficient performance of proposed timing estimators.

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“…A scheme, called Timing with Dirty Templates (TDT) [18] and its variants [19], [20] have been proposed to solve this problem using symbol-rate sampling. Relying on periodic transmission of non-zero mean symbols, a group of joint timing and template recovery algorithms have been developed in [21]- [25], with universal applicability in the presence of ISI and multiuser interference (MUI). Capitalizing on the fine correlation properties of binary codes, various algorithms have been proposed in [26]- [28], which provide much improved performance using fewer number of symbols.…”

Section: Synchronization Algorithmsmentioning

confidence: 99%

Comparative Analysis of some Low-Complexity Blind Synchronization Algorithms for IR-UWB Systems

Akbar¹,

Rădoi²,

Azou³

2012

JCM

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Ultra wideband (UWB) radio has emerged as anattractive candidate for short-range wireless communicationsin recent years due to its unique features. However,implementation of UWB radios in order to utilize these features is coupled with some pronounced design challenges.To achieve precise timing synchronization is one of the most crucial task among them and is a key factor to ensure a reliable performance of such systems. In this paper,we present an overview and comparative study of three synchronization algorithms which provide efficient performance under unique signal and channel characteristics of UWB. These algorithms employ cross-correlation, PN code matching and energy detection operations respectively to achieve synchronization. The performance is then analyzed by numerical results under realistic propagation environment that takes into account the severe multipath and interframe interference (IFI). Also, hardware complexity and acquisition speeds of these algorithms are discussed

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Energy detection based blind synchronization for pulse shape modulated IR-UWB systems

Cited by 8 publications

References 13 publications

Preamble aided energy detection based synchronization in non-coherent UWB receivers

Preamble aided energy detection based synchronization in non-coherent UWB receivers

Low-complexity synchronization algorithms for orthogonally modulated IR-UWB systems

Comparative Analysis of some Low-Complexity Blind Synchronization Algorithms for IR-UWB Systems

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