GNSS Signal Qualification for Mobile Device Positioning

The patent implements preliminary action by pre-establishing thresholds for signal propagation characteristics before actual positioning occurs. These thresholds (such as minimum signal strength, maximum noise level, or acceptable geometric dilution of precision values) are determined in advance based on empirical data or system requirements. During real-time operation, the system simply compares incoming signal characteristics against these pre-set thresholds, rather than performing complex real-time optimization calculations. This approach maintains high positioning accuracy while minimizing processing complexity and computational burden.

The patent applies partial action by implementing a tiered signal validation approach. Rather than applying equally strict validation to all satellite signals, the system evaluates signals based on their individual characteristics and applies appropriate validation levels. High-quality signals that clearly meet all criteria undergo minimal validation, while signals with marginal characteristics receive more thorough scrutiny. This selective validation strategy ensures reliable position data by filtering out clearly invalid signals while quickly accepting obviously valid signals, thus maintaining reliability without excessive processing time.