Abstract
Wavelet Packet Based Multicarrier Modulation (WPMCM) system uses usually a prototype filter bank multicarrier. The Daubechies-D10 filter bank (D10FB) is the basic framework of multicarrier modulation (MCM) transceiver system. In this paper, Lattice structures of exact Daubechies-D10 wavelet filter are adopted to design a prototybe filter bank realized for a proposed structure of WPMCM transceiver system. Magnitude and phase responses of the exact Daubechies-D10 LPF and the proposed structure are compared. They are nearly the same in the passband with improved roll-off characteristics of the magnitude response of the proposed. Whilefrom the results, it appears that the proposed WPMCM structure possess low speed of operation, less complexity and less power consumption.It is also noticed from SNR comparison, that the performance evaluation of the proposed WPMCM transceiver system is a moderate between other two previously issued structures.
Highlights
In the last few decades, wireless applications have been expanding
National Telecommunication and Information Administration’s (NTIA) allocates the spectrum frequency and demonstrates how the radio spectrum has been licensed and separated into number of bands where each band is specified to different services, such as mobile telephone, radio, television and others [1],[2]
That’s why cognitive radio (CR) has planned that these spectrum holes must be shared with unlicensed users (UUs) in the absence of Licensed users (LUs) [3]
Summary
In the last few decades, wireless applications have been expanding This progress calls for further radio spectrum. Licensed users (LUs) in most wireless communication applications utilize frequency spectrums inefficiently and portions of frequency spectrums are not used. Section shows the Lattice structure for wavelet filter bank be used to design the prototype filter. The resulting magnitude and phase filter responses are included for the designed prototype filter and the deviation between responses of the exact and those of the proposed structures.
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