An improved denoising method of wavelet modular maximum for DS-UWB systems
Xiaodong Yang · Applied science and technology · 2008
Traditional denoising methods can not satisfy the requirements of the USB(universal serial bus) system,because the duration time of the UWB(ultra wide bard) pulse signals is short and the emitting power is low.But the wavelet transform technique is idealized to depress the noise.A new denoising method,the ratio threshold method with similar coefficients,is proposed based on wavelet modulus maximum method.It can not only effectively restrain the noise,but also reserve the singularity of UWB signals.Simulation shows the new method is simpler and more efficient in denoising than wavelet modular maximum method.