Research on An Improved PMF-FFT Fast PN Code Acquisition Algorithm

Abstract

To solve the problem of the large Doppler frequency offset in the LEO communication system, this paper studies a rapid PN code acquisition method based on the PMF-FFT architecture, which searches the phase and frequency offset and at the same time reduces the acquisition time. It presents an improved method equivalent to windowing function and uses windowing process to overcome the attenuation of related peak envelope caused by partial matched filters.

Direct Sequence Spread Spectrum Signal’s Demodulator Acquisition Implementation Based on Fast Fourier Transform. Part 1. Problem Statement and Solution Approach

“…В последнее время представляется актуальным подход, основанный на использовании быстрого преобразования Фурье (БПФ) [2][3][4]. Основное преимущество этого подхода состоит в возможности совместного оценивания параметров сигнала в частотной и во временной области.…”