mytec
defa3ad440
Major refactoring of RFCP backend: - Modular propagation models (8 models) - SharedMemoryManager for terrain data - ProcessPoolExecutor parallel processing - WebSocket progress streaming - Building filtering pipeline (351k → 15k) - 82 unit tests Performance: Standard preset 38s → 5s (7.6x speedup) Known issue: Detailed preset timeout (fix in 3.1.0)
44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
"""
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Free Space Path Loss (FSPL) model.
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Used as baseline and for LOS conditions.
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FSPL = 20*log10(d) + 20*log10(f) + 32.45
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where d in km, f in MHz
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"""
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import math
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from app.propagation.base import PropagationModel, PropagationInput, PropagationOutput
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class FreeSpaceModel(PropagationModel):
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"""Free Space Path Loss — theoretical minimum propagation loss."""
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@property
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def name(self) -> str:
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return "Free-Space"
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@property
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def frequency_range(self) -> tuple:
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return (1, 100000)
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@property
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def distance_range(self) -> tuple:
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return (1, 1000000) # 1m to 1000km
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def calculate(self, input: PropagationInput) -> PropagationOutput:
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d_km = max(input.distance_m / 1000, 0.001)
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f = input.frequency_mhz
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L = 20 * math.log10(d_km) + 20 * math.log10(f) + 32.45
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return PropagationOutput(
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path_loss_db=L,
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model_name=self.name,
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is_los=True,
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breakdown={
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"distance_loss": 20 * math.log10(d_km),
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"frequency_loss": 20 * math.log10(f),
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"constant": 32.45,
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},
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)
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