On The Selection of Significant Multipath Components For Parsimonious DS-CDMA RAKE Receivers: A Covariance Bootstrap Based Approach

We consider a bootstrap based approach to identify the significant multipath parameters of a frequency selective slowly fading channel. The channel response is modelled as an FIR filter with length proportional to the channel delay-spread. We estimate the model parameters the time domain using the auto and cross-correlation functions. Based on the estimates, bootstrap based multiple hypothesis tests are then applied to identify the significant coefficients of the FIR filter. Simulation results demonstrate the power of this technique to design high performance and low complexity RAKE receivers