The two-unit CADLL structure multipath performance investigation

In this paper the performance of the recently proposed Coupled Amplitude Delay Lock Loops (CADLL) with two Units is investigated. CADLL structure ties to separately track the Line Of Sight (LOS) signal and multipath signals in order to mitigate the effects of the multiple reflections. The Unit is an independent working structure aiming to track a component which is either the LOS or the multipath. Several Units are incorporated in the CADLL structure, that is then able to track the different component rays from the overall incoming signal. It is shown that the two-Unit CADLL structure has good performance in terms of accuracy of estimating and robust convergence irrespective of initializing values.