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Model: Simplified 3GPP TS 38.306: Mbps ≈ layers × Qm × R × PRB × 12 × 14 × 2^μ × (1−OH) ÷ 1000. LTE uses μ=0, OH≈25%; NR OH≈14% (FR1 DL). Max code rate R = 948/1024 ≈ 0.926.
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