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grigo
2026-06-26 11:55:00 +03:00
parent 70828f693e
commit 4df70fa270
16 changed files with 268 additions and 927 deletions
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api/app/services/link.py
+39 -44
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@@ -2,7 +2,7 @@ from sqlalchemy.orm import Session
from app.config import get_settings
from app.core.atmosphere import atmospheric_loss_between
from app.core.diffraction import deygout
from app.core.diffraction import bullington_equivalent_loss
from app.core.fresnel import LosSample, los_analysis
from app.core.geo import GeoPoint, sample_path
from app.core.propagation import itm_loss, manual_link_budget, p452_loss
@@ -34,11 +34,12 @@ def link_budget(request: LinkBudgetRequest, db: Session | None = None) -> LinkBu
freq_hz=freq_hz,
k=request.k_factor,
)
diffraction_db = deygout(
knife_edge_diffraction_db = bullington_equivalent_loss(
surface_profile,
tx_height_agl=request.tx.height_agl,
rx_height_agl=request.rx.height_agl,
freq_hz=freq_hz,
k=request.k_factor,
)
vegetation_db = vegetation_loss_along(
points,
@@ -47,55 +48,46 @@ def link_budget(request: LinkBudgetRequest, db: Session | None = None) -> LinkBu
)
atmospheric_db = atmospheric_loss_between(tx, rx, freq_hz)
active_diffraction_db = diffraction_db
fspl_db = manual_link_budget(
tx,
rx,
request.tx.power_dbm,
request.tx.gain_dbi,
request.rx.gain_dbi,
request.rx.sensitivity_dbm,
request.frequency_mhz,
).fspl_db
active_diffraction_db = knife_edge_diffraction_db
active_atmospheric_db = atmospheric_db
propagation_model_loss_db = fspl_db + knife_edge_diffraction_db
propagation_excess_db = knife_edge_diffraction_db
if request.model == "manual":
propagation_db = 0.0
pass
elif request.model == "itm":
propagation_db = (
itm_loss(
tx,
rx,
tx_height_agl=request.tx.height_agl,
rx_height_agl=request.rx.height_agl,
freq_mhz=request.frequency_mhz,
elevation_profile_m=elevation_profile,
dem_path=str(settings.dem_path),
)
- manual_link_budget(
tx,
rx,
request.tx.power_dbm,
request.tx.gain_dbi,
request.rx.gain_dbi,
request.rx.sensitivity_dbm,
request.frequency_mhz,
).fspl_db
propagation_model_loss_db = itm_loss(
tx,
rx,
tx_height_agl=request.tx.height_agl,
rx_height_agl=request.rx.height_agl,
freq_mhz=request.frequency_mhz,
elevation_profile_m=elevation_profile,
dem_path=str(settings.dem_path),
)
active_diffraction_db = propagation_db
propagation_excess_db = propagation_model_loss_db - fspl_db
active_diffraction_db = propagation_excess_db
elif request.model == "p452":
propagation_db = (
p452_loss(
tx,
rx,
tx_height_agl=request.tx.height_agl,
rx_height_agl=request.rx.height_agl,
freq_mhz=request.frequency_mhz,
elevation_profile_m=elevation_profile,
dem_path=str(settings.dem_path),
)
- manual_link_budget(
tx,
rx,
request.tx.power_dbm,
request.tx.gain_dbi,
request.rx.gain_dbi,
request.rx.sensitivity_dbm,
request.frequency_mhz,
).fspl_db
propagation_model_loss_db = p452_loss(
tx,
rx,
tx_height_agl=request.tx.height_agl,
rx_height_agl=request.rx.height_agl,
freq_mhz=request.frequency_mhz,
elevation_profile_m=elevation_profile,
dem_path=str(settings.dem_path),
)
active_diffraction_db = propagation_db
propagation_excess_db = propagation_model_loss_db - fspl_db
active_diffraction_db = propagation_excess_db
active_atmospheric_db = 0.0
else:
raise NotImplementedError(f"{request.model} link model is not supported")
@@ -131,6 +123,9 @@ def link_budget(request: LinkBudgetRequest, db: Session | None = None) -> LinkBu
geometric_obstructions_count=len(geometric_obstructions),
building_obstructions_count=len(building_obstructions),
worst_obstruction=_convert_obstruction(los_result.worst_sample),
propagation_model_loss_db=propagation_model_loss_db,
propagation_excess_db=propagation_excess_db,
knife_edge_diffraction_db=knife_edge_diffraction_db,
data_sources=DataSources(
dem=bool(raster_files(settings.dem_path)),
buildings=request.include_buildings and db is not None,