Adaptive threshold settings in code phase acquisition for the double dwell architecture
Benny Vejlgaard, Preben Mogensen, Jakob Bæk Tejs Knudsen · 2002
An algorithm for code phase acquisition in direct-sequence spread-spectrum systems is presented and analyzed. The algorithm is a window based double dwell searcher. The algorithm with a moderate window size has shorter acquisition than the immediate verification algorithm has-especially at low SNR. The first-dwell uses a robust method based on a rank filter while the second dwell uses known threshold hypothesis. The code phase acquisition algorithm is compared with both single and double threshold hypothesis algorithms.