대한민국 해군 차기 구축함(KDDX) 듀얼밴드(S+X) 다기능 능동위상배열 레이더 실시간 빔 스케줄링 및 1,000Hz 0-Alloc C# 광대역 재밍 회피 엔진

3. 1,000Hz 0-Alloc C# KDDX 듀얼밴드 MFR 빔 스케줄링 구현

S/X-밴드 레이더의 빔 송출 시간표를 위협도 우선순위에 따라 1ms 단위로 마이크로초 정밀도로 할당하는 제로 가비지 C# 코드입니다.

using System;
using System.Runtime.CompilerServices;

public enum RadarBand : byte { SBandSurveillance = 0, XBandTracking = 1 }

public readonly struct BeamTask
{
    public readonly int TrackId;
    public readonly RadarBand Band;
    public readonly float ThreatPriority; // 0.0 ~ 1.0
    public readonly float DwellTimeUs;    // 마이크로초

    public BeamTask(int trackId, RadarBand band, float priority, float dwellTimeUs)
    {
        TrackId = trackId;
        Band = band;
        ThreatPriority = priority;
        DwellTimeUs = dwellTimeUs;
    }
}

public ref struct KddxBeamSchedulerEngine
{
    private readonly float _maxFrameBudgetUs;

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public KddxBeamSchedulerEngine(float frameBudgetUs = 1000.0f)
    {
        _maxFrameBudgetUs = frameBudgetUs;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public int ScheduleBeams(
        ReadOnlySpan candidateTasks,
        Span scheduledTasksOut,
        out float sBandUtilPercent,
        out float xBandUtilPercent)
    {
        float remainingBudgetUs = _maxFrameBudgetUs;
        float sBandUsed = 0.0f;
        float xBandUsed = 0.0f;
        int scheduledCount = 0;

        for (int i = 0; i < candidateTasks.Length && remainingBudgetUs > 50.0f; i++)
        {
            ref readonly var task = ref candidateTasks[i];
            if (task.DwellTimeUs <= remainingBudgetUs && scheduledCount < scheduledTasksOut.Length)
            {
                scheduledTasksOut[scheduledCount++] = task;
                remainingBudgetUs -= task.DwellTimeUs;

                if (task.Band == RadarBand.SBandSurveillance)
                    sBandUsed += task.DwellTimeUs;
                else
                    xBandUsed += task.DwellTimeUs;
            }
        }

        sBandUtilPercent = (sBandUsed / _maxFrameBudgetUs) * 100.0f;
        xBandUtilPercent = (xBandUsed / _maxFrameBudgetUs) * 100.0f;
        return scheduledCount;
    }
}