An application of multi-wavelet packets in digital communications

You, Mingli; Ilow, Jacek

doi:10.1109/dnsr.2004.1344705

Cited by 9 publications

(7 citation statements)

References 11 publications

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“…By using Daubechies wavelets as shaping pulse, the efficacy and potential of the scheme in improving bandwidth utilization is demonstrated. This work is extended in [36] where wavelet packets are used for modulation. While in [37] two types of wavelet based schemes to improve the spectral efficiency of a digital communication system are presented.…”

Section: Wavelets For Single Carrier Modulationmentioning

confidence: 99%

A Review of Wavelets for Digital Wireless Communication

Лакшманан

Nikookar

2006

Wireless Pers Commun

178

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Wavelets have been favorably applied in almost all aspects of digital wireless communication systems including data compression, source and channel coding, signal denoising, channel modeling and design of transceivers. The main property of wavelets in these applications is in their flexibility and ability to characterize signals accurately. In this paper recent trends and developments in the use of wavelets in wireless communications are reviewed. Major applications of wavelets in wireless channel modeling, interference mitigation, denoising, OFDM modulation, multiple access, Ultra Wideband communications, cognitive radio and wireless networks are surveyed. The confluence of information and communication technologies and the possibility of ubiquitous connectivity have posed a challenge to developing technologies and architectures capable of handling large volumes of data under severe resource constraints such as power and bandwidth. Wavelets are uniquely qualified to address this challenge. The flexibility and adaptation provided by wavelets have made wavelet technology a strong candidate for future wireless communication.

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Section: Wavelets For Single Carrier Modulationmentioning

confidence: 99%

A Review of Wavelets for Digital Wireless Communication

Лакшманан

Nikookar

2006

Wireless Pers Commun

178

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“…Hence there can be twice the number of subbands compared to those of OFDM and WPM for a given iteration. The spectrum of multiwavelet of multiplicity two and Daubechies scalar wavelet are illustrated in Figure 15 [22]. It is evident that there are only two subcarriers for scalar wavelet (red curves) but four subcarriers for multiwavelet system (blue dotted curves) for a given bandwidth.…”

Section: Bandwidth Efficiency and Sidelobe Suppressionmentioning

confidence: 99%

“…Design of various orthogonal multifilter banks is described in [18][19][20][21]. Application of multiwavelet packets for digital communications was first proposed by You and Ilow [22]. They have proposed the vector extension of Mallat's algorithm to implement multiwavelet packet modulation (MWPM) and have proved that spectrum efficiency will be increased r times compared to OFDM and scalar WPM.…”

Section: Multiwavelets and Multifiltersmentioning

confidence: 99%

“…Inverse discrete multiwavelet transform (IDMWPT) is performed on the parallel data stream using vector extension of Mallat's algorithm by using transpose of the low-pass and highpass matrices H and G. The process involved in IDMWPT block is shown in Figure 4. Each data symbol X[0], X [1], and so forth are r × 1 vector points where r is the multiplicity [22]. H and G correspond to low-pass and high-pass multiwavelet filters.…”

Section: System Modelmentioning

confidence: 99%

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Spectrum-Efficient Cognitive Radio Transceiver Using Multiwavelet Filters

Mathew

Premkumar

Madhukumar

2012

ISRN Communications and Networking

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Cognitive radio (CR) transceiver that can offer adequate data rate and multiuser support for future wireless networks is a promising technology for reliable and spectrum-efficient mobile communication. Orthogonal frequency division multiplexing (OFDM) and scalar wavelet based schemes have been proposed as physical layer techniques for CR. This paper proposes multiwavelet packetbased multicarrier multiple-access scheme as an equally promising candidate for multi-user CR networks and using existing orthonormal multiwavelets, the performance of the proposed system is evaluated. It is shown that the error performance of the proposed system under frequency and phase offset conditions is comparable with existing schemes.

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“…Secondly, the WPMD has faster speed of information transmission without the cyclic prefix. Although the results of lots of research and simulations indicate that WPMD has excellent performance [3] [4] , the integrated achievement of the algorithm is still under study because of its large quantities of digital signal process.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Implementation of Wavelet Packet Multi-Carrier Modulation Technique

Liu

2008

2008 4th International Conference on Wireless Communications, Networking and Mobile Computing

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In order to save CP, improve the frequency band usage and improve the ISI situation, an algorithm is proposed that can realizes multi-carrier modulation and demodulation of signal transportation by fast wavelet packet transform. It adopts wavelet packet function as carriers which have the characteristic of good orthogonality and time-frequency limitation. It can be seen from both theoretical analysis and software simulation that multi-carrier modulation and demodulation technique based on wavelet packet transform WPMD has unique advantage and great potential in improving the performance of communication system. Realization methods are flexible and various. A scheme of WPMD was presented and implemented based on high-level FPGA. Real-time running result indicates that using a high performance FPGA can satisfy the requirement of large computation capability needed by WPMD and high-speed mobile communication.

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An application of multi-wavelet packets in digital communications

Cited by 9 publications

References 11 publications

A Review of Wavelets for Digital Wireless Communication

A Review of Wavelets for Digital Wireless Communication

Spectrum-Efficient Cognitive Radio Transceiver Using Multiwavelet Filters

Simulation and Implementation of Wavelet Packet Multi-Carrier Modulation Technique

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