A New Robust GPS Satellite Signal Acquisition Using Lifting Wavelet
D. Djebouri, Ali Djebbari, M. Djebbouri · Telecommunications and Radio Engineering · 2005
A design for robust and less complex GPS satellite signal acquisition system using fast lifting wavelet decomposition is proposed. Acquisition in GPS system is used to calculate the code phase (or shift) and find the pseudo-range, which is used to calculate the position. The level of GPS receiving equipment system noise determines in part how precisely pseudo-range can be measured. A substitute algorithm for calculating the convolution by using fast lifting wavelet decomposition is proposed in order to carry out a robust less complex GPS signals acquisition system and to facilitate its implementation with maximum of accuracy in the presence of noise. Simulation is used for verifying the performance which shows that the proposed scheme based fast lifting wavelet transform outperforms the FFT search scheme in the presence of an hostile environment.