Performance Evaluation of PN Code Acquisition with Delay Diversity Receiver for TH-UWB System

Abstract

This paper evaluates the pseudo noise (PN) code acquisition with delay diversity receiver for a time hopping-ultra wideband (TH-UWB) system. The detection, overall miss detection, and false alarm probabilities, and mean acquisition time are evaluated over the hypothesis of multiple synchronous states (H 1 cells) in the uncertainty region of the PN code. And the code acquisition performance is evaluated when the correlator output are non-coherently combined by using equal gain combining (EGC) scheme. A constant false alarm rate (CFAR) criterion is applied to the threshold setting rule. From the simulation results, it is demonstrated that the proposed acquisition system with delay diversity receiver achieves a remarkable diversity gain with reasonable complexity. The proposed acquisition scheme can be applied to the UWB base stations in order to enhance the acquisition performance with low complexity.