Wavelet-Based Gaussian Impulse Generation and Optimization for UWB Communication

Abstract

Ultra Wide Band (UWB) communication is a promising technology and which will be a revolution in the area of wireless communication. These subnano second narrow pulses spreading the energy over a wide frequency band and hence provides bandwidth in Giga Hertz. As one of the major concern while choosing the pulse shape for UWB communication is satisfying the FCC emission mask requirements. For an efficient UWB communication spectral efficiency should be good and it is possible to attain only with an optimal wave shaping method. The wave optimization is possible with several methods but an efficient UWB system should consumes very low power, optimum bandwidth and efficiently fitting under the FCC mask. UWB wireless systems should generate minimum interference to other Narrow Band systems in the same frequency band and mutual interference degrades the performances. The proposed technique offers low power consumption, optimum bandwidth, good spectral efficiency and reduces the mutual interferences without modifying the narrowband system architecture. The wave optimization has performed with wavelet method, which is one of the promising method. The interference mitigations also achieved with the help of wavelet based wave shaping with multi-resolution technique for the Transmitted Reference Ultra Wide Band(TR-UWB) signal. Finally the generated UWB signal has optimized with different values of wave shaping factor 'α' for higher order derivative of Gaussian pulse. Here wavelet based impulse waveform is generated using MATLAB for obtaining an interference free multisystem.