Abstract
We propose the “Two-Step Search scheme with Linear search based Second step (TSS-LS)” by improving the conventional “Two-Step Search scheme with Bit reversal search based Second step (TSS-BS)” for reliable as well as rapid acquisition of Ultra Wide Band (UWB) signals in multipath channels. The proposed TSS-LS utilizes two different thresholds and search windows to achieve fast acquisition. Furthermore, unlike the TSS-BS in which the bit reversal algorithm is applied in both steps, the linear search is adopted for the second step in the proposed TSS-LS to correctly find the starting point in the range of effective delay spread of the multipath channels, and to obtain reliable bit error rate performance of the UWB systems.
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