\u97f3\u3084\u632f\u52d5\u306e\u3088\u3046\u306a\u6ce2\u306f\u3001\u6642\u9593\u3068\u3068\u3082\u306b\u4e0a\u4e0b\u306b\u3086\u308c\u308b\u5f62\uff08\u6642\u9593\u9818\u57df\uff09\u3067\u89b3\u5bdf\u3067\u304d\u308b\u304c\u3001\u305d\u306e\u4e2d\u8eab\u3092\u300c\u3069\u3093\u306a\u5468\u6ce2\u6570\u306e\u6210\u5206\u304c\u3001\u3069\u308c\u304f\u3089\u3044\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u300d\u3068\u3044\u3046\u8996\u70b9\uff08\u5468\u6ce2\u6570\u9818\u57df\uff09\u3067\u898b\u76f4\u3059\u3068\u3001\u96a0\u308c\u3066\u3044\u305f\u7279\u5fb4\u304c\u306f\u3063\u304d\u308a\u3059\u308b\u3002\u6642\u9593\u306e\u8a18\u9332\u3092\u5468\u6ce2\u6570\u306e\u8868\uff08\u30b9\u30da\u30af\u30c8\u30eb\uff09\u306b\u5909\u3048\u308b\u64cd\u4f5c\u304c\u30d5\u30fc\u30ea\u30a8\u5909\u63db\u3067\u3042\u308a\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u4e0a\u306e\u30c7\u30fc\u30bf\u306e\u3088\u3046\u306b\u6642\u9593\u3082\u5024\u3082\u300c\u7b49\u9593\u9694\u306e\u306a\u3089\u3093\u3060\u6570\u5217\u300d\u3068\u3057\u3066\u6271\u3046\u3068\u304d\u306b\u4f7f\u3046\u306e\u304c\u96e2\u6563\u30d5\u30fc\u30ea\u30a8\u5909\u63db\uff08DFT\uff09\u3067\u3042\u308b\u3002DFT\u306f\u3001\u9577\u3055N\u306e\u30c7\u30fc\u30bf\u5217\u3092N\u500b\u306e\u5468\u6ce2\u6570\u6210\u5206\uff08\u305d\u308c\u305e\u308c\u632f\u5e45\u3068\u4f4d\u76f8\u3092\u3082\u3064\u8907\u7d20\u6570\uff09\u3078\u5199\u50cf\u3059\u308b\u9053\u5177\u3067\u3001\u300c\u3053\u306e\u4fe1\u53f7\u306b\u306f\u3001\u5468\u6ce2\u6570k\u306e\u6b63\u5f26\u6ce2\u30fb\u4f59\u5f26\u6ce2\u304c\u3069\u308c\u3060\u3051\u6df7\u3056\u3063\u3066\u3044\u308b\u304b\u300d\u3092\u6570\u3067\u6559\u3048\u3066\u304f\u308c\u308b\u3002\u5b9f\u52d9\u306e\u5206\u6790\u5668\u3067\u3082\u3001\u4e00\u5b9a\u6642\u9593\u3060\u3051\u4fe1\u53f7\u3092\u5207\u308a\u53d6\u308a\u3001DFT\u3067\u632f\u5e45\u3068\u4f4d\u76f8\u3092\u6c42\u3081\u3066\u30b2\u30a4\u30f3\u3084\u4f4d\u76f8\u5dee\u3092\u7b97\u51fa\u3059\u308b\u4ed5\u7d44\u307f\u304c\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u3002[1][2][3][4]\n\n\n\n
DFT\u306e\u57fa\u672c\u5f0f\u306f\u3001\u9577\u3055N\u306e\u4fe1\u53f7x(n)\u304b\u3089\u5468\u6ce2\u6570\u30a4\u30f3\u30c7\u30c3\u30af\u30b9k\u306e\u6210\u5206X(k)\u3092\u8a08\u7b97\u3059\u308b\u5f62\u3067\u8868\u305b\u308b\uff08\u6307\u6570\u95a2\u6570exp(\u2212j2\u03c0kn\/N)\u306f\u3001\u5468\u6ce2\u6570k\u306e\u6b63\u5f26\u30fb\u4f59\u5f26\u306e\u5408\u6210\u3092\u8868\u3059\u91cd\u307f\u3067\u3042\u308b\uff09\u3002\u76f4\u611f\u7684\u306b\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u901f\u5ea6\u3067\u63fa\u308c\u308b\u300c\u57fa\u6e96\u306e\u6ce2\u300d\u3092\u7528\u610f\u3057\u3001\u5143\u306e\u4fe1\u53f7\u306b\u3069\u306e\u57fa\u6e96\u6ce2\u304c\u3069\u308c\u3060\u3051\u5f53\u3066\u306f\u307e\u308b\u304b\u3092\u300c\u5185\u7a4d\u300d\u3067\u898b\u3066\u3044\u308b\u3001\u3068\u3044\u3046\u30a4\u30e1\u30fc\u30b8\u3067\u3088\u3044\u3002\u3053\u3046\u3057\u3066\u5f97\u305fX(k)\u306e\u5927\u304d\u3055\u304c\u632f\u5e45\u3001\u89d2\u5ea6\u304c\u4f4d\u76f8\u306b\u5bfe\u5fdc\u3057\u3001\u5168\u4f53\u306e\u4e26\u3073\u304c\u30b9\u30da\u30af\u30c8\u30eb\u306b\u306a\u308b\u3002[2][3][4]\n\n\n\n
\u3053\u3053\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u306a\u306e\u306f\u3001\u300c\u6709\u9650\u6642\u9593\u3060\u3051\u5207\u308a\u53d6\u3063\u305f\u4fe1\u53f7\u3092\u3001\u7121\u9650\u306b\u540c\u3058\u5f62\u304c\u7e70\u308a\u8fd4\u3057\u3066\u3044\u308b\u3082\u306e\u3068\u3057\u3066\u6271\u3046\u300d\u3068\u3044\u3046DFT\u306e\u524d\u63d0\u3067\u3042\u308b\u3002\u3053\u306e\u524d\u63d0\u306e\u305f\u3081\u3001\u5207\u308a\u53d6\u3063\u305f\u7aef\u3068\u7aef\u304c\u300c\u6ce2\u306e\u9014\u4e2d\u300d\u3067\u3064\u306a\u304c\u3063\u3066\u3057\u307e\u3046\u3068\u3001\u5468\u6ce2\u6570\u8ef8\u4e0a\u3067\u30a8\u30cd\u30eb\u30ae\u30fc\u304c\u306b\u3058\u3080\u300c\u30ea\u30fc\u30b1\u30fc\u30b8\uff08\u6f0f\u308c\uff09\u300d\u304c\u8d77\u304d\u3001\u30d4\u30fc\u30af\u304c\u5e83\u304c\u3063\u305f\u308a\u88fe\u304c\u4f38\u3073\u305f\u308a\u3059\u308b\u3002\u5b9f\u9a13\u3067\u5468\u6ce2\u6570\u304c\u65e2\u77e5\u306a\u3089\u3001\u53d6\u308a\u8fbc\u307f\u6642\u9593\u3092\u4fe1\u53f7\u306e\u6574\u6570\u5468\u671f\u306b\u305d\u308d\u3048\u3066\u30ea\u30fc\u30b1\u30fc\u30b8\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u304c\u3001\u672a\u77e5\u306e\u4fe1\u53f7\u3092\u6e2c\u308bFFT\u30a2\u30ca\u30e9\u30a4\u30b6\u3067\u306f\u3075\u3064\u3046\u6574\u6570\u5468\u671f\u306b\u306a\u3089\u306a\u3044\u305f\u3081\u3001\u305d\u306e\u5bfe\u7b56\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002[4][1]\n\n\n\n
\u3053\u306e\u30ea\u30fc\u30b1\u30fc\u30b8\u3092\u6291\u3048\u308b\u4ee3\u8868\u7684\u306a\u624b\u6cd5\u304c\u7a93\u95a2\u6570\u3067\u3042\u308b\u3002\u7a93\u95a2\u6570\u306f\u3001\u5207\u308a\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u306e\u4e21\u7aef\u304c\u306a\u3081\u3089\u304b\u306b0\u3078\u8fd1\u3065\u304f\u3088\u3046\u91cd\u307f\u3092\u304b\u3051\u3001\u3064\u306a\u304e\u76ee\u306e\u6bb5\u5dee\uff08\u904e\u6e21\uff09\u3092\u548c\u3089\u3052\u308b\u50cd\u304d\u3092\u6301\u3064\u3002\u7a93\u3092\u304b\u3051\u308b\u3068\u30d4\u30fc\u30af\u306e\u5468\u56f2\u306b\u5e83\u304c\u308b\u30b9\u30da\u30af\u30c8\u30eb\u30fb\u30ea\u30fc\u30af\u304c\u4f4e\u6e1b\u3057\u3001\u72ed\u3044\u5e2f\u57df\u306b\u30a8\u30cd\u30eb\u30ae\u30fc\u3092\u96c6\u4e2d\u3055\u305b\u3084\u3059\u304f\u306a\u308b\u4e00\u65b9\u3001\u632f\u5e45\u306f\u5c0f\u3055\u304f\u898b\u3048\u308b\u305f\u3081\u3001\u7a93\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u305f\u632f\u5e45\u88dc\u6b63\uff08\u88dc\u6b63\u4fc2\u6570\uff09\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3068\u5b9a\u91cf\u89e3\u6790\u306b\u5f79\u7acb\u3064\u3002\u7a93\u3092\u9078\u3076\u3068\u304d\u306f\u3001\u5206\u89e3\u80fd\uff08\u30d4\u30fc\u30af\u3092\u7d30\u304f\u3057\u305f\u3044\uff09\u3068\u6f0f\u308c\u4f4e\u6e1b\uff08\u30b5\u30a4\u30c9\u30ed\u30fc\u30d6\u3092\u5c0f\u3055\u304f\u3057\u305f\u3044\uff09\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u3092\u610f\u8b58\u3057\u3001\u76ee\u7684\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u308b\u306e\u304c\u5b9f\u52d9\u306e\u57fa\u672c\u3067\u3042\u308b\u3002[5][6][4]\n\n\n\n
\u6b21\u306b\u3001\u9ad8\u901f\u30d5\u30fc\u30ea\u30a8\u5909\u63db\uff08FFT\uff09\u306b\u3064\u3044\u3066\u6574\u7406\u3059\u308b\u3002FFT\u306f\u300c\u30d5\u30fc\u30ea\u30a8\u5909\u63db\u305d\u306e\u3082\u306e\u300d\u3067\u306f\u306a\u304f\u3001\u300cDFT\u3092\u9ad8\u901f\u306b\u8a08\u7b97\u3059\u308b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u300d\u306e\u7dcf\u79f0\u3067\u3001\u540c\u3058\u7d50\u679c\u3092\u3088\u308a\u5c11\u306a\u3044\u8a08\u7b97\u91cf\u3067\u51fa\u3059\u305f\u3081\u306e\u5de5\u592b\u3067\u3042\u308b\u30021965\u5e74\u306bCooley\u3068Tukey\u304c\u4ee3\u8868\u7684\u306aFFT\u6cd5\u3092\u793a\u3057\u3001\u4ee5\u5f8c\u30c7\u30b8\u30bf\u30eb\u8a08\u7b97\u6a5f\u306e\u767a\u5c55\u3068\u3068\u3082\u306b\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u89e3\u6790\u3092\u53ef\u80fd\u306b\u3057\u3066\u304d\u305f\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u7406\u5c48\u3084\u524d\u63d0\uff08\u6709\u9650\u6642\u9593\u306e\u5207\u308a\u51fa\u3057\u3001\u30ca\u30a4\u30ad\u30b9\u30c8\u5468\u6ce2\u6570\u3001\u7a93\u306b\u3088\u308b\u30ea\u30fc\u30b1\u30fc\u30b8\u5bfe\u7b56\u306a\u3069\uff09\u306fDFT\u3068\u5171\u901a\u3067\u3001FFT\u306f\u300c\u7d20\u65e9\u304f\u6c42\u3081\u308b\u300d\u5b9f\u88c5\u4e0a\u306e\u52a0\u901f\u624b\u6bb5\u3068\u7406\u89e3\u3059\u308b\u3068\u9593\u9055\u3044\u304c\u306a\u3044\u3002[7][8][4]\n\n\n\n
FFT\u3067\u5f97\u3089\u308c\u308b\u30b9\u30da\u30af\u30c8\u30eb\u306e\u6027\u8cea\u306f\u3001\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570fs\u3068\u300c\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u300d\uff081\u56de\u306eFFT\u3067\u4f7f\u3046\u30b5\u30f3\u30d7\u30eb\u6570\uff09BL\u3067\u6c7a\u307e\u308b\u3002\u7406\u8ad6\u4e0a\u3001\u6e2c\u5b9a\u53ef\u80fd\u306a\u6700\u9ad8\u5468\u6ce2\u6570\u306f\u30ca\u30a4\u30ad\u30b9\u30c8\u5468\u6ce2\u6570fn=fs\/2\u3067\u3042\u308a\u3001\u5468\u6ce2\u6570\u5206\u89e3\u80fd\uff08\u3068\u306a\u308a\u5408\u3046\u5468\u6ce2\u6570\u30d3\u30f3\u306e\u9593\u9694\uff09\u306fdf=fs\/BL\u306b\u306a\u308b\u3002\u5206\u89e3\u80fd\u3092\u7d30\u304b\u304f\u3057\u305f\u3044\uff08\u30d4\u30fc\u30af\u3092\u898b\u5206\u3051\u305f\u3044\uff09\u3068\u304d\u306fBL\u3092\u5927\u304d\u304f\u3057\u3066\u6642\u9593\u7a93D=BL\/fs\u3092\u9577\u304f\u53d6\u308b\u5fc5\u8981\u304c\u3042\u308b\u304c\u3001\u7e70\u308a\u8fd4\u3057\u66f4\u65b0\u306e\u901f\u3055\u306f\u843d\u3061\u308b\u3002\u9006\u306b\u3001BL\u3092\u5c0f\u3055\u304f\u3059\u308c\u3070\u66f4\u65b0\u306f\u901f\u3044\u304cdf\u304c\u7c97\u304f\u306a\u308b\u3002\u3053\u306e\u57fa\u672c\u95a2\u4fc2\u3092\u62bc\u3055\u3048\u308b\u3068\u3001\u76ee\u6a19\u306e\u5468\u6ce2\u6570\u5206\u89e3\u80fd\u304b\u3089\u5fc5\u8981\u306a\u7a93\u9577\u3092\u9006\u7b97\u3067\u304d\u308b\u3002[4]\n\n\n\n
\u300c\u30bc\u30ed\u30d1\u30c7\u30a3\u30f3\u30b0\u300d\u306f\u3088\u304f\u4f7f\u308f\u308c\u308b\u88dc\u52a9\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3001\u30c7\u30fc\u30bf\u5217\u306e\u5f8c\u308d\u306b\u30bc\u30ed\u3092\u4ed8\u3051\u8db3\u3057\u3066BL\u3092\u898b\u304b\u3051\u4e0a\u5927\u304d\u304f\u3057\u3001\u30b9\u30da\u30af\u30c8\u30eb\u306e\u30d3\u30f3\u9593\u9694\u3092\u7d30\u304b\u304f\u8868\u793a\u3055\u305b\u308b\u65b9\u6cd5\u3067\u3042\u308b\u3002\u305f\u3060\u3057\u3001\u30bc\u30ed\u30d1\u30c7\u30a3\u30f3\u30b0\u306f\u3042\u304f\u307e\u3067\u5468\u6ce2\u6570\u76ee\u76db\u308a\u306e\u523b\u307f\u3092\u7d30\u304b\u304f\u3059\u308b\uff08\u88dc\u9593\u306b\u4f3c\u305f\uff09\u52b9\u679c\u3067\u3001\u6642\u9593\u7a93\u3092\u5b9f\u969b\u306b\u9577\u304f\u3057\u305f\u308f\u3051\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u771f\u306e\u5206\u89e3\u80fd\u304c\u4e0a\u304c\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u70b9\u306b\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u307e\u305f\u3001\u7a93\u95a2\u6570\u3092\u4f7f\u3046\u3068\u632f\u5e45\u304c\u6e1b\u308b\u305f\u3081\u3001\u7a93\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u305f\u632f\u5e45\u88dc\u6b63\u3092\u5408\u308f\u305b\u3066\u9069\u7528\u3059\u308b\u3068\u3001\u5b9a\u91cf\u5024\u306e\u6574\u5408\u304c\u53d6\u308a\u3084\u3059\u3044\u3002[9][5]\n\n\n\n
\u73fe\u5834\u3067\u306e\u8a2d\u5b9a\u306f\u3001\u6b21\u306e\u9806\u5e8f\u3067\u8003\u3048\u308b\u3068\u5931\u6557\u304c\u5c11\u306a\u3044\u3002\u7b2c\u4e00\u306b\u3001\u5bfe\u8c61\u306e\u6700\u9ad8\u5468\u6ce2\u6570\u3068\u5fc5\u8981\u306a\u5206\u89e3\u80fd\u3092\u898b\u7a4d\u3082\u308a\u3001fs\u3068BL\u3092\u6c7a\u3081\u308b\uff08df=fs\/BL\u3001fn=fs\/2\u3092\u5e38\u306b\u610f\u8b58\u3059\u308b\uff09\u3002\u7b2c\u4e8c\u306b\u3001\u6574\u6570\u5468\u671f\u304c\u671f\u5f85\u3067\u304d\u306a\u3044\u4e00\u822c\u4fe1\u53f7\u3067\u306f\u7a93\u95a2\u6570\u3092\u9069\u7528\u3057\u3001\u30ea\u30fc\u30b1\u30fc\u30b8\u3092\u6291\u3048\u308b\u3002\u7b2c\u4e09\u306b\u3001\u30d4\u30fc\u30af\u306e\u9ad8\u3055\u3092\u8a55\u4fa1\u3059\u308b\u76ee\u7684\u304c\u3042\u308b\u3068\u304d\u306f\u3001\u63a1\u7528\u7a93\u306b\u5fdc\u3058\u305f\u88dc\u6b63\u4fc2\u6570\u3092\u4f7f\u3063\u3066\u30ec\u30d9\u30eb\u3092\u88dc\u6b63\u3059\u308b\u3002\u7b2c\u56db\u306b\u3001\u898b\u304b\u3051\u306e\u8aad\u307f\u3084\u3059\u3055\u3092\u4e0a\u3052\u305f\u3044\u3068\u304d\u3060\u3051\u30bc\u30ed\u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u7528\u3044\u308b\u304c\u3001\u771f\u306e\u5206\u89e3\u80fd\u306f\u7a93\u9577\u304c\u6c7a\u3081\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3002\u3053\u308c\u3089\u306e\u539f\u5247\u306f\u3001\u97f3\u97ff\u30fb\u632f\u52d5\u306e\u6e2c\u5b9a\u3067\u4e00\u822c\u7684\u306b\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u624b\u9806\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u3002[6][9][5][4]\n\n\n\n
DFT\/FFT\u306e\u5fdc\u7528\u306f\u5e83\u304f\u3001\u6a5f\u68b0\u306e\u7570\u5e38\u691c\u77e5\u3067\u3082\u5b9a\u5e38\u7684\u306a\u56de\u8ee2\u632f\u52d5\u306e\u57fa\u672c\u5468\u6ce2\u6570\u3068\u9ad8\u8abf\u6ce2\u3001\u3042\u308b\u3044\u306f\u5074\u5e2f\u57df\u306e\u767a\u751f\u306a\u3069\u3001\u6642\u9593\u6ce2\u5f62\u3067\u306f\u898b\u3048\u306b\u304f\u3044\u30d1\u30bf\u30fc\u30f3\u3092\u5206\u96e2\u3057\u3066\u89b3\u5bdf\u3067\u304d\u308b\u3002\u77e9\u5f62\u6ce2\u304c\u5947\u6570\u6b21\u9ad8\u8abf\u6ce2\u306e\u91cd\u306d\u5408\u308f\u305b\u3067\u8868\u305b\u308b\u3001\u3068\u3044\u3063\u305f\u5178\u578b\u4f8b\u306f\u300c\u8907\u96d1\u306a\u6ce2\uff1d\u3044\u304f\u3064\u304b\u306e\u5358\u7d14\u306a\u6b63\u5f26\u6ce2\u306e\u8db3\u3057\u5408\u308f\u305b\u300d\u3068\u3044\u3046\u898b\u65b9\u306e\u5177\u4f53\u4f8b\u3067\u3042\u308a\u3001\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u91c8\u306e\u57fa\u790e\u8a13\u7df4\u306b\u306a\u308b\u3002\u307e\u305f\u3001\u8a08\u6e2c\u5668\u306e\u8aac\u660e\u3067\u3082\u3001DFT\u3092\u4f7f\u3063\u3066\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u6210\u5206\u306e\u5b9f\u90e8\u30fb\u865a\u90e8\u3092\u53d6\u308a\u51fa\u3057\u3001\u30b2\u30a4\u30f3\u3084\u4f4d\u76f8\u5dee\u3092\u6c42\u3081\u308b\u65b9\u6cd5\u304c\u7d39\u4ecb\u3055\u308c\u3066\u304a\u308a\u3001\u89e3\u6790\u306e\u51fa\u529b\u304c\u300c\u632f\u5e45\u3068\u4f4d\u76f8\u306e\u7d44\uff08\u8907\u7d20\u6570\uff09\u300d\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308b\u3002[1][4]\n\n\n\n
\u6700\u5f8c\u306b\u3001\u5b9f\u52d9\u3067\u6df7\u4e71\u3057\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3092\u307e\u3068\u3081\u308b\u3002- DFT\u306f\u300c\u65b9\u6cd5\u300d\u3001FFT\u306f\u300cDFT\u3092\u901f\u304f\u89e3\u304f\u8a08\u7b97\u624b\u6bb5\u300d\u3067\u3001\u4e21\u8005\u306e\u7d50\u679c\u306f\u540c\u3058\u6027\u8cea\u3092\u6301\u3064\u3002- \u30b9\u30da\u30af\u30c8\u30eb\u306e\u5206\u89e3\u80fd\u306fdf=fs\/BL\u3067\u6c7a\u307e\u308a\u3001\u771f\u306e\u5206\u89e3\u80fd\u3092\u4e0a\u3052\u305f\u3051\u308c\u3070\u6642\u9593\u7a93\u3092\u9577\u304f\u3059\u308b\uff08BL\u3092\u5927\u304d\u304f\u3059\u308b\uff09\u5fc5\u8981\u304c\u3042\u308b\u3002- \u7a93\u95a2\u6570\u306f\u30ea\u30fc\u30b1\u30fc\u30b8\u3092\u6291\u3048\u308b\u304c\u3001\u632f\u5e45\u3084\u5e2f\u57df\u5f62\u72b6\u306b\u5f71\u97ff\u3059\u308b\u305f\u3081\u3001\u76ee\u7684\u306b\u5408\u3046\u7a93\u306e\u9078\u629e\u3068\u88dc\u6b63\u304c\u5927\u5207\u3067\u3042\u308b\u3002- \u30bc\u30ed\u30d1\u30c7\u30a3\u30f3\u30b0\u306f\u300c\u898b\u3084\u3059\u3055\u300d\u3092\u6539\u5584\u3059\u308b\u304c\u3001\u672c\u8cea\u7684\u306a\u5206\u89e3\u80fd\u306f\u5909\u3048\u306a\u3044\u3002- \u6709\u52b9\u5e2f\u57df\u306f\u30ca\u30a4\u30ad\u30b9\u30c8\u5468\u6ce2\u6570\u307e\u3067\uff08fn=fs\/2\uff09\u3067\u3042\u308a\u3001\u305d\u308c\u3092\u8d85\u3048\u308b\u6210\u5206\u306f\u30a8\u30a4\u30ea\u30a2\u30b7\u30f3\u30b0\u3092\u62db\u304f\u305f\u3081\u3001A\/D\u306e\u524d\u6bb5\u3067\u306e\u5e2f\u57df\u5236\u9650\u3068\u9069\u5207\u306afs\u306e\u9078\u629e\u304c\u4e0d\u53ef\u6b20\u3067\u3042\u308b\uff08\u3053\u306e\u70b9\u306fFFT\u57fa\u790e\u89e3\u8aac\u3067\u3082\u5f37\u8abf\u3055\u308c\u308b\uff09\u3002[7][9][5][6][4]\n\n\n\n
\u3053\u308c\u3089\u306e\u57fa\u790e\u3092\u62bc\u3055\u3048\u3066\u304a\u3051\u3070\u3001DFT\/FFT\u306f\u300c\u6642\u9593\u306e\u8a18\u9332\u3092\u3001\u5468\u6ce2\u6570\u3054\u3068\u306e\u5730\u56f3\u306b\u7ffb\u8a33\u3059\u308b\u300d\u78ba\u304b\u306a\u9053\u5177\u3068\u3057\u3066\u3001\u97f3\u3084\u632f\u52d5\u306e\u7279\u5fb4\u62bd\u51fa\u3001\u7570\u5e38\u306e\u624b\u304c\u304b\u308a\u63a2\u3057\u3001\u88c5\u7f6e\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u307e\u3067\u5e45\u5e83\u304f\u5f79\u306b\u7acb\u3064\u3002<\/p>\n\n\n\n[1] https:\/\/www.nfcorp.co.jp\/techinfo\/dictionary\/063\/<\/p>\n\n\n\n[2] https:\/\/qiita.com\/TumoiYorozu\/items\/5855d75a47ef2c7e62c8<\/p>\n\n\n\n[3] https:\/\/appswingby.com\/%E9%9B%A2%E6%95%A3%E3%83%95%E3%83%BC%E3%83%AA%E3%82%A8%E5%A4%89%E6%8F%9B-%E4%BB%8A%E6%9B%B4%E8%81%9E%E3%81%91%E3%81%AA%E3%81%84it%E7%94%A8%E8%AA%9E%E9%9B%86\/<\/p>\n\n\n\n[4] https:\/\/www.nti-audio.com\/ja\/%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9\/fft%E3%81%AE%E5%9F%BA%E7%A4%8E%E3%81%A8%E9%9F%B3%E9%9F%BF%E6%8C%AF%E5%8B%95%E6%B8%AC%E5%AE%9A%E3%81%B8%E3%81%AE%E5%BF%9C%E7%94%A8<\/p>\n\n\n\n[5] https:\/\/www.analog.com\/jp\/resources\/technical-articles\/weblab-tnj081-window-function-compensation-factor-for-1hz-power-density-calculation.html<\/p>\n\n\n\n[6] https:\/\/svmeas.rion.co.jp\/support\/p38veq0000000cmg-att\/FFT_07881.pdf<\/p>\n\n\n\n[7] https:\/\/kgrneer.com\/fourier-fft-kaisetu\/<\/p>\n\n\n\n[8] https:\/\/www.techeyesonline.com\/article\/tech-column\/detail\/Reference-FFTAnalyzer-01\/<\/p>\n\n\n\n[9] https:\/\/watlab-blog.com\/2020\/11\/16\/zero-padding-fft\/<\/p>\n\n\n\n[10] https:\/\/www.onosokki.co.jp\/HP-WK\/eMM_back\/emm138.pdf<\/p>\n\n\n\n[11] https:\/\/www.momoyama-usagi.com\/entry\/math-seigyo13<\/p>\n\n\n\n[12] https:\/\/imagingsolution.net\/math\/fourier-transform\/discrete-fourier-transform\/<\/p>\n\n\n\n[13] https:\/\/ameblo.jp\/kagakusyanotamago12345\/entry-12882858340.html<\/p>\n\n\n\n[14] https:\/\/www.aps-web.jp\/blog\/108440\/<\/p>\n\n\n\n[15] https:\/\/www.orixrentec.jp\/helpful_info\/detail.html?id=27<\/p>\n\n\n\n[16] http:\/\/www.ic.is.tohoku.ac.jp\/~swk\/lecture\/yaruodsp\/dft.html<\/p>\n\n\n\n[17] https:\/\/www.sda.nagoya-cu.ac.jp\/kimoto\/sda_lec_HP\/Digital_Media_lec\/Chap5\/Chap5_Sec17.pdf<\/p>\n\n\n\n[18] https:\/\/www.onosokki.co.jp\/HP-WK\/eMM_back\/emm150.pdf<\/p>\n\n\n\n[19] https:\/\/chaosmemo.com\/entry\/2025\/02\/15\/143159<\/p>\n\n\n\n[20] https:\/\/www.aps-web.jp\/blog\/107988\/<\/p>\n\n\n\n
\u203b\u672c\u30da\u30fc\u30b8\u306f\u3001AI\u306e\u6d3b\u7528\u3084\u7814\u7a76\u306b\u95a2\u9023\u3059\u308b\u539f\u7406\u30fb\u6a5f\u5668\u30fb\u30c7\u30d0\u30a4\u30b9\u306b\u3064\u3044\u3066\u5b66\u3076\u305f\u3081\u306b\u3001\u500b\u4eba\u7684\u306b\u6574\u7406\u30fb\u8a18\u8ff0\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002\u5185\u5bb9\u306b\u306f\u8aa4\u308a\u3084\u898b\u843d\u3068\u3057\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3082\u3057\u304a\u6c17\u3065\u304d\u306e\u70b9\u3084\u3054\u52a9\u8a00\u7b49\u3054\u3056\u3044\u307e\u3057\u305f\u3089\u3001\u3054\u9023\u7d61\u3044\u305f\u3060\u3051\u307e\u3059\u3068\u5e78\u3044\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n \u203b\u672c\u30da\u30fc\u30b8\u306e\u5185\u5bb9\u306f\u3001\u500b\u4eba\u7684\u306a\u5b66\u7fd2\u304a\u3088\u3073\u60c5\u5831\u6574\u7406\u3092\u76ee\u7684\u3068\u3057\u3066\u63d0\u4f9b\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u305d\u306e\u6b63\u78ba\u6027\u3001\u5b8c\u5168\u6027\u3001\u6709\u7528\u6027\u7b49\u306b\u3064\u3044\u3066\u3044\u304b\u306a\u308b\u4fdd\u8a3c\u3082\u884c\u3044\u307e\u305b\u3093\u3002\u672c\u30da\u30fc\u30b8\u306e\u60c5\u5831\u3092\u5229\u7528\u3057\u305f\u3053\u3068\u3001\u307e\u305f\u306f\u5229\u7528\u3067\u304d\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u3088\u3063\u3066\u767a\u751f\u3057\u305f\u640d\u5bb3\uff08\u76f4\u63a5\u7684\u30fb\u9593\u63a5\u7684\u30fb\u7279\u5225\u30fb\u5076\u767a\u7684\u30fb\u7d50\u679c\u7684\u640d\u5bb3\u3092\u542b\u307f\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306b\u9650\u308a\u307e\u305b\u3093\uff09\u306b\u3064\u3044\u3066\u3001\u5f53\u65b9\u306f\u4e00\u5207\u8cac\u4efb\u3092\u8ca0\u3044\u307e\u305b\u3093\u3002\u3054\u5229\u7528\u306f\u5229\u7528\u8005\u3054\u81ea\u8eab\u306e\u8cac\u4efb\u3067\u304a\u9858\u3044\u3044\u305f\u3057\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" 3. \u57fa\u672c\u7684\u306a\u4fe1\u53f7\u51e6\u7406\u624b\u6cd5 3.4 \u96e2\u6563\u30d5\u30fc\u30ea\u30a8\u5909\u63db\uff08DFT\uff09\u3068\u9ad8\u901f\u30d5\u30fc\u30ea\u30a8\u5909\u63db\uff08FFT\uff09 \u97f3\u3084\u632f\u52d5\u306e\u3088\u3046\u306a\u6ce2\u306f\u3001\u6642\u9593\u3068\u3068\u3082\u306b\u4e0a\u4e0b\u306b\u3086\u308c\u308b\u5f62\uff08\u6642\u9593\u9818\u57df\uff09\u3067\u89b3\u5bdf\u3067\u304d\u308b\u304c\u3001\u305d\u306e\u4e2d\u8eab\u3092\u300c\u3069\u3093\u306a\u5468\u6ce2\u6570\u306e\u6210\u5206\u304c\u3001\u3069\u308c\u304f\u3089\u3044\u542b\u307e\u2026<\/p>\n","protected":false},"author":1,"featured_media":571,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-635","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts\/635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=635"}],"version-history":[{"count":2,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts\/635\/revisions"}],"predecessor-version":[{"id":800,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts\/635\/revisions\/800"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/media\/571"}],"wp:attachment":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}