6세대 유무인 복합 공중전 무인전투기(CCA/로열 윙맨) 편대 분산 능동 전자전(EA) 협동 기만 재밍 및 협대역 디지털 RF 메모리(DRFM) C# SIMD 서보

3. Zero-Allocation C# SIMD 분산 전자전 서보 구현

적 레이더 펄스 도달 시각(TOA)과 주파수(AOA/FOA)를 실시간 분석하여 4대 CCA의 DRFM 재생 위상 오프셋과 도플러 변조율을 20,000 Hz로 분산 계산하는 C# .NET 9.0 엔진입니다.

using System;
using System.Runtime.CompilerServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;

namespace ZeliDesk.Defense.DistributedElectronicAttack
{
    public readonly ref struct ThreatRadarTelemetry
    {
        public readonly float ThreatCarrierFrequencyGhz; // e.g. 9.45 GHz (X-band)
        public readonly float PulseRepetitionIntervalUs; // PRI ~ 125 us
        public readonly float MeasuredSnrDb;             // Intercept SNR
        public readonly float RelativeRangeToThreatKm;   // Distance to radar
        public readonly float InterUavPhaseJitterDeg;    // Datalink sync error

        public ThreatRadarTelemetry(float freq, float pri, float snr, float rangeKm, float phaseJitter)
        {
            ThreatCarrierFrequencyGhz = freq;
            PulseRepetitionIntervalUs = pri;
            MeasuredSnrDb = snr;
            RelativeRangeToThreatKm = rangeKm;
            InterUavPhaseJitterDeg = phaseJitter;
        }
    }

    public ref struct DistributedJammingCommand
    {
        public float DrfmPlaybackDelayNs;
        public float CoherentPhaseOffsetRad;
        public float DopplerChirpRateKhzPerSec;
        public float SyntheticErpGainDb;
        public bool MonopulseBreakLockTriggered;
    }

    public static class CooperativeElectronicAttackEngine
    {
        private const int UavSwarmCount = 4; // 4 CCA Wingman units
        private const float SpeedOfLight = 2.998e8f;

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void SynthesizeCoordinatedJamming(
            in ThreatRadarTelemetry telemetry,
            int uavIndex, // 0 to 3
            ref DistributedJammingCommand output)
        {
            float freqHz = telemetry.ThreatCarrierFrequencyGhz * 1.0e9f;
            float wavelengthM = SpeedOfLight / freqHz;

            // 1. Range Gate Pull-Off (RGPO) False Target Delay
            // Pull false target 250m behind real aircraft every step
            float falseTargetOffsetMeters = 250.0f * (uavIndex * 0.25f + 1.0f);
            float drfmDelaySeconds = (2.0f * falseTargetOffsetMeters) / SpeedOfLight;
            output.DrfmPlaybackDelayNs = drfmDelaySeconds * 1.0e9f;

            // 2. Velocity Gate Pull-Off (VGPO) Doppler Sweep
            // Accelerate false target at 45 m/s^2 -> Doppler chirp
            float dopplerChirp = (2.0f * 45.0f / wavelengthM) * 1.0e-3f; // kHz/s
            output.DopplerChirpRateKhzPerSec = dopplerChirp;

            // 3. Monopulse Angle Deception: Phase Alternation (0 vs pi)
            // Even indexed UAVs radiate at 0 rad, Odd indexed at pi rad
            float targetPhase = (uavIndex % 2 == 1) ? MathF.PI : 0.0f;

            // Compensate inter-UAV datalink phase jitter
            float jitterRad = telemetry.InterUavPhaseJitterDeg * (MathF.PI / 180.0f);
            output.CoherentPhaseOffsetRad = targetPhase - (jitterRad * 0.5f);

            // 4. Coherent Combining Power Gain Estimation
            // Gain = 10 * log10(N^2 * cos^2(jitter/2))
            float jitterLoss = MathF.Cos(jitterRad * 0.5f);
            float coherentGainLinear = (UavSwarmCount * UavSwarmCount) * (jitterLoss * jitterLoss);
            float gainDb = 10.0f * MathF.Log10(MathF.Max(1.0f, coherentGainLinear));
            output.SyntheticErpGainDb = Math.Clamp(gainDb, 0.0f, 12.04f); // Max 12.04 dB for N=4

            // 5. Radar Tracking Break-Lock Condition
            output.MonopulseBreakLockTriggered = (gainDb > 9.5f && telemetry.MeasuredSnrDb > 15.0f);
        }
    }
}