A GA-based UWB pulse waveform design method

Wang, Min; Yang, Shuyuan; Wu, Shunjun

doi:10.1016/j.dsp.2007.07.001

Cited by 15 publications

(15 citation statements)

References 19 publications

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“…Thus, the genetic algorithm (GA) is a very good algorithm to achieve the optimum solution. Using the characteristics of natural human evolution, natural crossover and mutation, to create a new generation in which the gene performance of each offspring are better than the preceding generation, to reach the purpose of optimization and convergence performance [18,[21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A canonic-signed-digit coded genetic algorithm for designing finite impulse response digital filter

Pan

2010

Digital Signal Processing

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Section: Introductionmentioning

confidence: 99%

A canonic-signed-digit coded genetic algorithm for designing finite impulse response digital filter

Pan

2010

Digital Signal Processing

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“…These modulation schemes were widely adopted in the early years of UWB technology because of the difficulty to generate appropriate UWB pulses which can respect the severe FCC power constraints, thus limiting the choice. However, in recent years, the possibility of generating multiple mutually orthogonal and spectrally efficient pulses with the same widths [27,28] has encouraged the use of alternative orthogonal modulation (OM) schemes [29] for IR-UWB. Pulse shape modulation (PSM) is an interesting OM scheme in which information is conveyed by the shape of pulse [30,31].…”

Section: Contributionsmentioning

confidence: 99%

“…In all ensuing simulations, specially designed B-spline-based orthogonal UWB pulses are used with duration T ψ = 1.28 ns [28]. Each symbol consists of N f = 13 frames, while each frame contains N c = 15 chips.…”

Section: Simulations and Comparisonsmentioning

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 micro GA was developed in Al-Sawafi (2004) as a multiuser detection technique in CDMA system. GA has also been applied to UWB communication systems in Gezici et al (2005);Wang et al (2004) and Wang, Yang & Wu (2008). In Gezici et al (2005), a GA-based iterative finger selection scheme, which depends on the direct evaluation of the objective function, was proposed.…”

Section: Introductionmentioning

confidence: 99%

“…T.Wang et al in Wang et al (2004) formulated an optimization problem aiming to reduce multiband jam interference power on UWB THSS IR system with 2-PPM which belongs to the class of nonlinear combinational optimization. UWB pulse design method was carried out in Wang, Yang & Wu (2008) using the GA optimization. However, to the best of our knowledge, no work has been done, using GA for channel equalization with pilot-aided channel estimation in DS-UWB communication systems.…”

Section: Introductionmentioning

confidence: 99%