Acquisition.jl

GNSS signal acquisition using parallel code phase search.

Acquisition.jl is part of the JuliaGNSS ecosystem and works with GNSSSignals.jl for signal definitions.

Installation

using Pkg
Pkg.add("Acquisition")

Quick Start

using Acquisition, GNSSSignals

# Load your signal data
signal = # ... your complex baseband samples

# Acquire GPS L1 C/A signals
results = acquire(GPSL1(), signal, 5e6Hz, 1:32)

# Or use coarse-fine acquisition for better Doppler resolution
results = coarse_fine_acquire(GPSL1(), signal, 5e6Hz, 1:32)

Features

• Parallel code phase search: FFT-based correlation for fast acquisition
• Coarse-fine acquisition: Two-stage search for improved Doppler resolution
• Pre-computed plans: Reuse FFT plans and buffers for batch processing
• Plotting support: Visualize acquisition results with Plots.jl

Background

For an introduction to GNSS signal acquisition, see:

• Kaplan & Hegarty, Understanding GPS/GNSS: Principles and Applications, Chapter 8
• GPS signal acquisition (navipedia.net)

Contents

• Usage Guide
• • Basic Acquisition
  • Detecting Satellites
  • Coarse-Fine Acquisition
  • Custom Doppler Range
  • Using Acquisition Plans
  • Plotting Results
• API Reference
• • Acquisition Functions
  • Types
  • Index