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jedarden 357459e0b4 feat(s simulator): add GDOP overlay and realistic synthetic data
Implemented GDOP overlay visualization support and enhanced synthetic data
generation for the pre-deployment simulator.

GDOP Overlay Features:
- Added GDOPColorMap() for color mapping (green/yellow/orange/red/gray)
- Added GDOPHeatmapData struct for frontend consumption
- Added ToHeatmapData() to convert results to overlay format
- Added ComputeAccuracyMap() for expected accuracy per cell
- Added ComputeColorMap() for RGB color array generation
- Added GetWorstCoverageCells() to find problem areas
- Added GetBestCoverageCells() to find optimal positions

Realistic Synthetic Data:
- Added GenerateCSIFrame() for binary CSI frame simulation
  with temporal fading, frequency selectivity, and noise
- Added GenerateCSIFrames() for time-series CSI generation
- Added ComputeLinkMetrics() for realistic link statistics:
  - RSSI statistics (mean, std dev)
  - Packet delivery rate simulation
  - Link quality scoring
- Enhanced temporal variation with Rayleigh fading model

Tests:
- Added 8 new tests for overlay functionality
- Added 4 new tests for synthetic data generation
- All tests follow table-driven pattern

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-09 13:32:48 -04:00
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