Comprehensive report for FPGA partner covering: - System architecture and channel model - LDPC decoder hardware blocks - Code optimization journey (5.23 -> 1.03 photons/slot) - SC-LDPC threshold saturation results - RTL implementation plan and area estimates Includes 10 figures: system architecture, channel model, degree distributions, FER curves, threshold progressions. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>