\n| ippsFFTFwd_CToC_64fc<\/span><\/td>\n | FFT\u76f8\u5173<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u53c2\u8003\u6587\u6863\u5b9a\u4e49，intel-ipp\u5e93\u4e13\u4e3aintel\u670d\u52a1\u5668\u8bbe\u8ba1，\u9cb2\u9e4f\u57fa\u4e8e\u9cb2\u9e4f\u5904\u7406\u5668，\u8fd9\u4e9b\u51fd\u6570\u5168\u90e8\u8981\u91cd\u65b0\u66ff\u4ee3，\u67e5\u770b\u9cb2\u9e4f\u670d\u52a1\u5668\u76f8\u5173\u6587\u6863\u3001\u53d1\u73b0\u9cb2\u9e4f\u670d\u52a1\u5668\u5728FFT\u7684\u8ba1\u7b97\u4e0a\u6709KML-FFT\u5e93\u53ef\u5bf9FFT\u8fdb\u884c\u52a0\u901f\u8ba1\u7b97\u3002<\/p>\n \u51fd\u6570\u8bf4\u660e-KML_FFT\u5e93\u51fd\u6570\u8bf4\u660e-\u57fa\u7840\u6570\u5b66\u5e93-\u9cb2\u9e4f\u6570\u5b66\u5e93 \u5f00\u53d1\u6307\u5357-\u5f00\u53d1\u6307\u5357-HPCKit-\u9cb2\u9e4fHPC\u5f00\u53d1\u6587\u6863-\u9cb2\u9e4f\u793e\u533a<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091059-6811e92357f82.png\") <\/p>\n
\u5f97\u3001\u7a7a\u95f4\u5f00\u8f9f\u7528C++\u6807\u51c6\u5e93\u66ff\u4ee3，\u6c42\u548c\u65b9\u5dee\u7b49\u53ef\u901a\u8fc7std\u5e93\u641e\u5b9a，\u5176\u4ed6\u7684\u901a\u8fc7KML-FFT\u66ff\u6362\u3002<\/p>\n \u73b0\u5728\u8981\u6d4b\u8bd5\u4e0bIntel\u76f8\u5173\u51fd\u6570\u4e0e\u6807\u51c6c++\u63d0\u5347\u4e86\u591a\u5c11\u5462，\u4ee3\u7801\u5982\u4e0b：<\/p>\n #include <QCoreApplication>
\n#include <QElapsedTimer>
\n#include <iostream>
\n#include ".\/Include\/ipp\/ipp.h"
\n#include <cstring> \/\/ \u6807\u51c6\u5e93\u51fd\u6570
\n#include <random>
\n#include <algorithm>
\n#include <iterator><\/p>\n \/\/ Windows\u73af\u5883\u9700\u8981\u663e\u5f0f\u94fe\u63a5IPP\u5e93
\n#pragma comment(lib, "ippsmt.lib")
\n#pragma comment(lib, "ippcoremt.lib")<\/p>\n constexpr int SIZE = 1 << 20; \/\/ 1MB\u6570\u636e（262,144\u4e2afloat）
\nconstexpr int TRIALS = 1000; \/\/ \u6d4b\u8bd5\u6b21\u6570<\/p>\n \/\/ \u6d4b\u8bd5IPP\u51fd\u6570
\nvoid testIPP() {
\n Ipp32f* src = nullptr, * dst = nullptr;
\n QElapsedTimer timer;<\/p>\n \/\/ \u5185\u5b58\u5206\u914d
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n src = ippsMalloc_32f(SIZE);
\n ippsFree(src);
\n }
\n auto mallocTime = timer.nsecsElapsed() \/ TRIALS;<\/p>\n \/\/ \u5185\u5b58\u8d4b\u503c
\n src = ippsMalloc_32f(SIZE);
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n ippsSet_32f(3.14159f, src, SIZE);
\n }
\n auto setTime = timer.nsecsElapsed() \/ TRIALS;
\n ippsFree(src);<\/p>\n \/\/ \u5185\u5b58\u7f6e\u96f6
\n src = ippsMalloc_32f(SIZE);
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n ippsZero_32f(src, SIZE);
\n }
\n auto zeroTime = timer.nsecsElapsed() \/ TRIALS;
\n ippsFree(src);<\/p>\n \/\/ \u5185\u5b58\u62f7\u8d1d
\n src = ippsMalloc_32f(SIZE);
\n dst = ippsMalloc_32f(SIZE);
\n ippsSet_32f(2.71828f, src, SIZE);
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n ippsCopy_32f(src, dst, SIZE);
\n }
\n auto copyTime = timer.nsecsElapsed() \/ TRIALS;
\n ippsFree(src);
\n ippsFree(dst);<\/p>\n std::cout << "[IPP] Malloc: " << mallocTime << " ns\\\\n"
\n << "[IPP] Set: " << setTime << " ns\\\\n"
\n << "[IPP] Zero: " << zeroTime << " ns\\\\n"
\n << "[IPP] Copy: " << copyTime << " ns\\\\n";
\n}<\/p>\n \/\/ \u6d4b\u8bd5\u6807\u51c6\u5e93
\nvoid testSTD() {
\n float* src = nullptr, * dst = nullptr;
\n QElapsedTimer timer;<\/p>\n \/\/ \u5185\u5b58\u5206\u914d
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n src = new float[SIZE];
\n delete[] src;
\n }
\n auto mallocTime = timer.nsecsElapsed() \/ TRIALS;<\/p>\n \/\/ \u5185\u5b58\u8d4b\u503c（\u5faa\u73af）
\n src = new float[SIZE];
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n#pragma omp simd for
\n for (int i = 0; i < SIZE; ++i)
\n src[i] = 3.14159f;
\n \/\/std::fill_n(src, SIZE, 3.14159f);
\n }
\n auto setTime = timer.nsecsElapsed() \/ TRIALS;
\n delete[] src;<\/p>\n \/\/ \u5185\u5b58\u7f6e\u96f6（memset）
\n src = new float[SIZE];
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n memset(src, 0, SIZE * sizeof(float));
\n }
\n auto zeroTime = timer.nsecsElapsed() \/ TRIALS;
\n delete[] src;<\/p>\n \/\/ \u5185\u5b58\u62f7\u8d1d（memcpy）
\n src = new float[SIZE];
\n dst = new float[SIZE];
\n memset(src, 0, SIZE * sizeof(float));
\n timer.start();
\n for (int i = 0; i < TRIALS; ++i) {
\n memcpy(dst, src, SIZE * sizeof(float));
\n }
\n auto copyTime = timer.nsecsElapsed() \/ TRIALS;
\n delete[] src;
\n delete[] dst;<\/p>\n std::cout << "[STD] Malloc: " << mallocTime << " ns\\\\n"
\n << "[STD] Set: " << setTime << " ns\\\\n"
\n << "[STD] Zero: " << zeroTime << " ns\\\\n"
\n << "[STD] Copy: " << copyTime << " ns\\\\n";
\n}<\/p>\n \/\/ \u751f\u6210\u968f\u673a\u6d6e\u70b9\u6570\u7ec4
\nvoid generateRandomData(float* data, size_t size) {
\n std::random_device rd;
\n std::mt19937 gen(rd());
\n std::uniform_real_distribution<float> dist(0.0f, 1000.0f);
\n for (size_t i = 0; i < size; ++i) {
\n data[i] = dist(gen);
\n }
\n}<\/p>\n \/\/ \u6807\u51c6\u5e93\u8ba1\u7b97\u5747\u503c\u4e0e\u6807\u51c6\u5dee
\nvoid stdMeanStdDev(const float* data, size_t size, float& mean, float& stdDev) {
\n double sum = 0.0, sumSq = 0.0;
\n for (size_t i = 0; i < size; ++i) {
\n sum += data[i];
\n sumSq += data[i] * data[i];
\n }
\n mean = sum \/ size;
\n stdDev = std::sqrt((sumSq – sum * sum \/ size) \/ (size – 1)); \/\/ \u6837\u672c\u6807\u51c6\u5dee
\n}<\/p>\n \/\/ \u6027\u80fd\u6d4b\u8bd5\u4e3b\u51fd\u6570
\nvoid performanceTest(size_t dataSize, int iterations) {
\n \/\/ \u5185\u5b58\u5206\u914d\u4e0e\u6570\u636e\u521d\u59cb\u5316
\n Ipp32f* ippData = ippsMalloc_32f(dataSize);
\n std::vector<float> stdData(dataSize);
\n generateRandomData(ippData, dataSize);
\n std::copy(ippData, ippData + dataSize, stdData.begin());<\/p>\n \/\/ \u9884\u70ed\u7f13\u5b58（\u53ef\u9009）
\n std::sort(stdData.begin(), stdData.end());<\/p>\n \/\/ \u6d4b\u8bd5\u6392\u5e8f\u6027\u80fd
\n auto start = std::chrono::high_resolution_clock::now();
\n for (int i = 0; i < iterations; ++i) {
\n ippsSortAscend_32f_I(ippData, dataSize); \/\/ IPP\u539f\u5730\u6392\u5e8f
\n }
\n auto ippSortTime = std::chrono::duration_cast<std::chrono::milliseconds>(
\n std::chrono::high_resolution_clock::now() – start
\n ).count();<\/p>\n start = std::chrono::high_resolution_clock::now();
\n for (int i = 0; i < iterations; ++i) {
\n std::sort(stdData.begin(), stdData.end()); \/\/ \u6807\u51c6\u5e93\u6392\u5e8f
\n }
\n auto stdSortTime = std::chrono::duration_cast<std::chrono::milliseconds>(
\n std::chrono::high_resolution_clock::now() – start
\n ).count();<\/p>\n \/\/ \u6d4b\u8bd5\u5747\u503c\u4e0e\u6807\u51c6\u5dee\u8ba1\u7b97\u6027\u80fd
\n float ippMean, ippStdDev;
\n start = std::chrono::high_resolution_clock::now();
\n for (int i = 0; i < iterations; ++i) {
\n ippsMeanStdDev_32f(ippData, dataSize, &ippMean, &ippStdDev, ippAlgHintFast); \/\/ IPP\u8ba1\u7b97
\n }
\n auto ippStatTime = std::chrono::duration_cast<std::chrono::milliseconds>(
\n std::chrono::high_resolution_clock::now() – start
\n ).count();<\/p>\n float stdMean, stdStdDev;
\n start = std::chrono::high_resolution_clock::now();
\n for (int i = 0; i < iterations; ++i) {
\n stdMeanStdDev(stdData.data(), dataSize, stdMean, stdStdDev); \/\/ \u6807\u51c6\u5e93\u8ba1\u7b97
\n }
\n auto stdStatTime = std::chrono::duration_cast<std::chrono::milliseconds>(
\n std::chrono::high_resolution_clock::now() – start
\n ).count();<\/p>\n \/\/ \u8f93\u51fa\u7ed3\u679c
\n std::cout << "===== \u6027\u80fd\u5bf9\u6bd4 (\u6570\u636e\u91cf: " << dataSize << ", \u8fed\u4ee3\u6b21\u6570: " << iterations << ") =====\\\\n";
\n std::cout << "\u6392\u5e8f:\\\\n"
\n << " IPP ippsSortAscend_32f_I: " << ippSortTime << " ms\\\\n"
\n << " std::sort: " << stdSortTime << " ms\\\\n";
\n std::cout << "\u7edf\u8ba1\u8ba1\u7b97:\\\\n"
\n << " IPP ippsMeanStdDev_32f: " << ippStatTime << " ms\\\\n"
\n << " \u6807\u51c6\u5e93\u5b9e\u73b0: " << stdStatTime << " ms\\\\n";<\/p>\n ippsFree(ippData);
\n}<\/p>\n int main(int argc, char* argv[])
\n{
\n QCoreApplication a(argc, argv);<\/p>\n std::cout << "=== Intel IPP Performance ===\\\\n";
\n testIPP();<\/p>\n std::cout << "\\\\n=== Standard Library Performance ===\\\\n";
\n testSTD();<\/p>\n performanceTest(1e6, 10); \/\/ \u6d4b\u8bd5100\u4e07\u6570\u636e，\u8fed\u4ee310\u6b21
\n return 0;
\n} <\/p>\n \u4f7f\u75281000\u6b21\u5bf91MB\u6570\u636e（262,144\u4e2afloat）\u7684\u6548\u7387\u5bf9\u6bd4\u3002\u5bf9\u6bd4\u7ed3\u679c\u5982\u4e0b：<\/p>\n Windows\u7cfb\u7edfDebug\u6a21\u5f0f<\/p>\n === Intel IPP Performance ===
\n[IPP] Malloc: 1293522 ns
\n[IPP] Set: \u00a0 \u00a0174418 ns
\n[IPP] Zero: \u00a0 94937 ns
\n[IPP] Copy: \u00a0 501033 ns
\n\u00a0
\n=== Standard Library Performance ===
\n[STD] Malloc: 1202868 ns
\n[STD] Set: \u00a0 \u00a01940080 ns
\n[STD] Zero: \u00a0 93922 ns
\n[STD] Copy: \u00a0 190766 ns
\n===== \u6027\u80fd\u5bf9\u6bd4 (\u6570\u636e\u91cf: 1000000, \u8fed\u4ee3\u6b21\u6570: 10) =====
\n\u6392\u5e8f:
\n\u00a0 IPP ippsSortAscend_32f_I: 240 ms
\n\u00a0 std::sort: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a01404 ms
\n\u7edf\u8ba1\u8ba1\u7b97:
\n\u00a0 IPP ippsMeanStdDev_32f: \u00a0 \u00a02 ms
\n\u00a0 \u6807\u51c6\u5e93\u5b9e\u73b0: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a026 ms
\n\u00a0
\nF:\\\\Workspace\\\\Code\\\\Qt\\\\TestIntelIpps\\\\x64\\\\Debug\\\\TestIntelIpps.exe (\u8fdb\u7a0b 21008)\u5df2\u9000\u51fa，\u4ee3\u7801\u4e3a 0 (0x0)\u3002
\n\u8981\u5728\u8c03\u8bd5\u505c\u6b62\u65f6\u81ea\u52a8\u5173\u95ed\u63a7\u5236\u53f0，\u8bf7\u542f\u7528\u201c\u5de5\u5177\u201d->\u201c\u9009\u9879\u201d->\u201c\u8c03\u8bd5\u201d->\u201c\u8c03\u8bd5\u505c\u6b62\u65f6\u81ea\u52a8\u5173\u95ed\u63a7\u5236\u53f0\u201d\u3002
\n\u6309\u4efb\u610f\u952e\u5173\u95ed\u6b64\u7a97\u53e3. . . <\/p>\n Windows\u7cfb\u7edfRelease\u6a21\u5f0f<\/p>\n === Intel IPP Performance ===
\n[IPP] Malloc: 48886 ns
\n[IPP] Set: \u00a0 \u00a0301834 ns
\n[IPP] Zero: \u00a0 87169 ns
\n[IPP] Copy: \u00a0 544983 ns
\n\u00a0
\n=== Standard Library Performance ===
\n[STD] Malloc: 44820 ns
\n[STD] Set: \u00a0 \u00a0710 ns
\n[STD] Zero: \u00a0 85777 ns
\n[STD] Copy: \u00a0 211307 ns
\n===== \u6027\u80fd\u5bf9\u6bd4 (\u6570\u636e\u91cf: 1000000, \u8fed\u4ee3\u6b21\u6570: 10) =====
\n\u6392\u5e8f:
\n\u00a0 IPP ippsSortAscend_32f_I: 229 ms
\n\u00a0 std::sort: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0109 ms
\n\u7edf\u8ba1\u8ba1\u7b97:
\n\u00a0 IPP ippsMeanStdDev_32f: \u00a0 \u00a03 ms
\n\u00a0 \u6807\u51c6\u5e93\u5b9e\u73b0: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a00 ms
\n\u00a0
\nF:\\\\Workspace\\\\Code\\\\Qt\\\\TestIntelIpps\\\\x64\\\\Release\\\\TestIntelIpps.exe (\u8fdb\u7a0b 26764)\u5df2\u9000\u51fa，\u4ee3\u7801\u4e3a 0 (0x0)\u3002
\n\u8981\u5728\u8c03\u8bd5\u505c\u6b62\u65f6\u81ea\u52a8\u5173\u95ed\u63a7\u5236\u53f0，\u8bf7\u542f\u7528\u201c\u5de5\u5177\u201d->\u201c\u9009\u9879\u201d->\u201c\u8c03\u8bd5\u201d->\u201c\u8c03\u8bd5\u505c\u6b62\u65f6\u81ea\u52a8\u5173\u95ed\u63a7\u5236\u53f0\u201d\u3002
\n\u6309\u4efb\u610f\u952e\u5173\u95ed\u6b64\u7a97\u53e3. . . <\/p>\n Linux\u7cfb\u7edf(Centos 7.9) Debug\u6a21\u5f0f<\/p>\n === Intel IPP Performance ===
\n[IPP] Malloc: 350 ns
\n[IPP] Set: \u00a0 \u00a0206298 ns
\n[IPP] Zero: \u00a0 104632 ns
\n[IPP] Copy: \u00a0 766895 ns
\n\u00a0
\n=== Standard Library Performance ===
\n[STD] Malloc: 145 ns
\n[STD] Set: \u00a0 \u00a02213560 ns
\n[STD] Zero: \u00a0 143366 ns
\n[STD] Copy: \u00a0 837936 ns
\n===== \u6027\u80fd\u5bf9\u6bd4 (\u6570\u636e\u91cf: 1000000, \u8fed\u4ee3\u6b21\u6570: 10) =====
\n\u6392\u5e8f:
\n\u00a0 IPP ippsSortAscend_32f_I: 300 ms
\n\u00a0 std::sort: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a01437 ms
\n\u7edf\u8ba1\u8ba1\u7b97:
\n\u00a0 IPP ippsMeanStdDev_32f: \u00a0 \u00a03 ms
\n\u00a0 \u6807\u51c6\u5e93\u5b9e\u73b0: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a031 ms
\n\u6309 <RETURN> \u6765\u5173\u95ed\u7a97\u53e3…
\n\u00a0\u00a0 <\/p>\n \u00a0<\/p>\n Linux\u7cfb\u7edf(Centos 7.9) Release\u6a21\u5f0f<\/p>\n \u00a0<\/p>\n === Intel IPP Performance ===
\n[IPP] Malloc: 214 ns
\n[IPP] Set: \u00a0 \u00a0230157 ns
\n[IPP] Zero: \u00a0 88688 ns
\n[IPP] Copy: \u00a0 509544 ns
\n\u00a0
\n=== Standard Library Performance ===
\n[STD] Malloc: 42 ns
\n[STD] Set: \u00a0 \u00a0725504 ns
\n[STD] Zero: \u00a0 274262 ns
\n[STD] Copy: \u00a0 614060 ns
\n===== \u6027\u80fd\u5bf9\u6bd4 (\u6570\u636e\u91cf: 1000000, \u8fed\u4ee3\u6b21\u6570: 10) =====
\n\u6392\u5e8f:
\n\u00a0 IPP ippsSortAscend_32f_I: 231 ms
\n\u00a0 std::sort: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0109 ms
\n\u7edf\u8ba1\u8ba1\u7b97:
\n\u00a0 IPP ippsMeanStdDev_32f: \u00a0 \u00a03 ms
\n\u00a0 \u6807\u51c6\u5e93\u5b9e\u73b0: \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a012 ms
\n\u6309 <RETURN> \u6765\u5173\u95ed\u7a97\u53e3… <\/p>\n \u672c\u673a\u7cfb\u7edf\u4e3aWindows 11 \u4e13\u4e1a\u7248 24H2 CPU\u7c7b\u578b\u4e3aIntel(R) Core(TM) i7-7700 CPU @ 3.60GHz \u00a0 3.60 GHz\u3002<\/p>\n \u7efc\u5408\u5bf9\u6bd4\u4e0b\u6765，\u9664Set\u5916\u3001\u5176\u4f59\u51fd\u6570\u6807\u51c6\u5e93\u4f18\u5316\u76f8\u5f53\u4e0d\u9519\u3002\u63a5\u8fd1\u4e0eIPP\u5e93\u7684\u6027\u80fd\u3002\u800cSET\u51fd\u6570IPP\u5e93\u670910\u500d\u4ee5\u4e0a\u7684\u901f\u5ea6\u63d0\u5347\u3002<\/p>\n \u597d\u50cf\u4e5f\u53ef\u4ee5\u63a5\u53d7，\u63a5\u4e0b\u4e0b\u5f00\u59cb\u9a8c\u8bc1FFT\u3002<\/p>\n \u67e5\u770b\u5b98\u7f51\u8bf4\u660e，\u5929\u584c\u4e86<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091100-6811e92413f09.png\") <\/p>\n
\u4e0d\u884c，\u7d27\u6025\u793e\u533a\u6c42\u52a9\u3002<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091100-6811e9245590e.png\") <\/p>\n
\u67e5\u770b\u672c\u673a\u670d\u52a1\u5668<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091100-6811e924bd002.png\") <\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091101-6811e925a5f07.png\") <\/p>\n
\u7b49\u7b49，\u8fd9\u91cc\u597d\u50cf\u662fkml_fft\u5f00\u5934\u63a5\u53e3,\u800c\u6587\u6863\u8bf4\u7684\u662fkml_ffth,\u662f\u4e0d\u662f\u8fd9\u91cc\u4e0d\u5c55\u793a\u8fd8\u662f\u5199\u9519\u4e86，\u7ee7\u7eed\u8ffd\u95ee<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091102-6811e92608a5a.png\") <\/p>\n
\u6574\u4e2a\u8bb0\u5f55\u5982\u4e0b：<\/p>\n \u5de5\u5355\u8be6\u60c5-\u9cb2\u9e4f\u793e\u533a<\/p>\n \u5f97\u5230\u652f\u6301\u7684\u56de\u590d\u3001\u63a5\u4e0b\u6765\u9a8c\u8bc1FFT\u7ed3\u679c\u5427，\u4ee3\u7801\u5982\u4e0b：<\/p>\n int rank = 2;
\n int *n;
\n n = (int*)kml_fft_malloc(sizeof(int) * rank);
\n n[0] = 2;
\n n[1] = 3;
\n double init[6][2] = {{120, 0}, {8, 8}, {0, 0}, {0, 16}, {0, 16}, {-8, 8}};
\n kml_fft_complex *in;
\n in = (kml_fft_complex*)kml_fft_malloc(sizeof(kml_fft_complex) * n[0] * n[1]);
\n for (int i = 0; i < n[0] * n[1]; i++) {
\n in[i][0] = init[i][0];
\n in[i][1] = init[i][1];
\n }
\n kml_fft_complex *out;
\n out = (kml_fft_complex*)kml_fft_malloc(sizeof(kml_fft_complex) * n[0] * n[1]);
\n kml_fft_plan plan;
\n plan = kml_fft_plan_dft(rank, n, in, out, KML_FFT_FORWARD, KML_FFT_ESTIMATE);
\n kml_fft_execute_dft(plan, in, out); <\/p>\n kml_fft_destroy_plan(plan);
\n kml_fft_free(n);
\n kml_fft_free(in);
\n kml_fft_free(out); <\/p>\n \/*
\n * out = {{1.200000e+02, 4.800000e+01}, {1.338564e+02, -1.385641e+01},
\n * {1.061436e+02, 1.385641e+01}, {1.360000e+02, -3.200000e+01},
\n * {1.120000e+02, -8.000000e+00}, {1.120000e+02, -8.000000e+00}}
\n *\/ <\/p>\n \u4fdd\u5b58\u7ed3\u679c\u6587\u4ef6\u4f7f\u7528matlab\u9a8c\u8bc1，matlab\u4ee3\u7801\u5982\u4e0b：<\/p>\n clear; clc;<\/p>\n data = importdata('F:\\\\Workspace\\\\input_signal.txt'); % \u5feb\u901f\u8bfb\u53d6\u6570\u503c\u77e9\u9635[6](@ref)<\/p>\n M = data(:,1)+1j*data(:,2);<\/p>\n CV = abs(fft(M));<\/p>\n data1 = importdata('F:\\\\Workspace\\\\fft_output.txt'); % \u5feb\u901f\u8bfb\u53d6\u6570\u503c\u77e9\u9635[6](@ref)<\/p>\n M1 = data1(:,1)+1j*data1(:,2);<\/p>\n CV1 = abs(M1);<\/p>\n plot(1:1024,CV,1:1024,CV1); legend('line1', 'line2');<\/p>\n \u7ed3\u679c\u5b8c\u5168\u4e00\u81f4：<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091102-6811e926b95c7.png\") <\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb863\u6b21\uff0c\u70b9\u8d5e17\u6b21\uff0c\u6536\u85cf25\u6b21\u3002\u53c2\u8003\u6587\u6863\u5b9a\u4e49\uff0cintel-ipp\u5e93\u4e13\u4e3aintel\u670d\u52a1\u5668\u8bbe\u8ba1\uff0c\u9cb2\u9e4f\u57fa\u4e8e\u9cb2\u9e4f\u5904\u7406\u5668\uff0c\u8fd9\u4e9b\u51fd\u6570\u5168\u90e8\u8981\u91cd\u65b0\u66ff\u4ee3\uff0c\u67e5\u770b\u9cb2\u9e4f\u670d\u52a1\u5668\u76f8\u5173\u6587\u6863\u3001\u53d1\u73b0\u9cb2\u9e4f\u670d\u52a1\u5668\u5728FFT\u7684\u8ba1\u7b97\u4e0a\u6709KML-FFT\u5e93\u53ef\u5bf9FFT\u8fdb\u884c\u52a0\u901f\u8ba1\u7b97\u3002qt\u6211\u4eec\u4f7f\u75285.9.8\uff0c\u5f53\u7136\u5176\u4ed6\u7248\u672c\u4e5f\u662fOK\u7684\uff0c\u56e0\u4e3a\u670d\u52a1\u5668\u627e\u4e0d\u5230\u5bf9\u5e94\u7684QT-ARM\u5b89\u88c5\u5305\u3002\u9996\u5148\u662f\u7cfb\u7edf\u5b89\u88c5\uff0c\u9cb2\u9e4f\u670d\u52a1\u5668\u4f7f\u7528\u7684\u662f\u534e\u4e3a\u9cb2\u9e4f\u5904\u7406\u5668\uff0c\u57fa\u4e8eARM\u67b6\u6784\uff0c\u4e5f\u53ef\u5b89\u88c5centos\u7b49\uff0c\u5efa\u8bae\u5b89\u88c5\u534e\u4e3a\u6b27\u62c9\u7cfb\u7edf\u3002\u5f97\u3001\u7a7a\u95f4\u5f00\u8f9f\u7528C++\u6807\u51c6\u5e93\u66ff\u4ee3\uff0c\u6c42\u548c\u65b9\u5dee\u7b49\u53ef\u901a\u8fc7std\u5e93\u641e\u5b9a\uff0c\u5176\u4ed6\u7684\u901a\u8fc7KML-FFT\u66ff\u6362\u3002<\/p>\n","protected":false},"author":2,"featured_media":34727,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,174,43,44],"topic":[],"class_list":{"0":"post-34741","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-server","8":"tag-c","10":"tag-43","11":"tag-44"},"yoast_head":"\n windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/34741.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb863\u6b21\uff0c\u70b9\u8d5e17\u6b21\uff0c\u6536\u85cf25\u6b21\u3002\u53c2\u8003\u6587\u6863\u5b9a\u4e49\uff0cintel-ipp\u5e93\u4e13\u4e3aintel\u670d\u52a1\u5668\u8bbe\u8ba1\uff0c\u9cb2\u9e4f\u57fa\u4e8e\u9cb2\u9e4f\u5904\u7406\u5668\uff0c\u8fd9\u4e9b\u51fd\u6570\u5168\u90e8\u8981\u91cd\u65b0\u66ff\u4ee3\uff0c\u67e5\u770b\u9cb2\u9e4f\u670d\u52a1\u5668\u76f8\u5173\u6587\u6863\u3001\u53d1\u73b0\u9cb2\u9e4f\u670d\u52a1\u5668\u5728FFT\u7684\u8ba1\u7b97\u4e0a\u6709KML-FFT\u5e93\u53ef\u5bf9FFT\u8fdb\u884c\u52a0\u901f\u8ba1\u7b97\u3002qt\u6211\u4eec\u4f7f\u75285.9.8\uff0c\u5f53\u7136\u5176\u4ed6\u7248\u672c\u4e5f\u662fOK\u7684\uff0c\u56e0\u4e3a\u670d\u52a1\u5668\u627e\u4e0d\u5230\u5bf9\u5e94\u7684QT-ARM\u5b89\u88c5\u5305\u3002\u9996\u5148\u662f\u7cfb\u7edf\u5b89\u88c5\uff0c\u9cb2\u9e4f\u670d\u52a1\u5668\u4f7f\u7528\u7684\u662f\u534e\u4e3a\u9cb2\u9e4f\u5904\u7406\u5668\uff0c\u57fa\u4e8eARM\u67b6\u6784\uff0c\u4e5f\u53ef\u5b89\u88c5centos\u7b49\uff0c\u5efa\u8bae\u5b89\u88c5\u534e\u4e3a\u6b27\u62c9\u7cfb\u7edf\u3002\u5f97\u3001\u7a7a\u95f4\u5f00\u8f9f\u7528C++\u6807\u51c6\u5e93\u66ff\u4ee3\uff0c\u6c42\u548c\u65b9\u5dee\u7b49\u53ef\u901a\u8fc7std\u5e93\u641e\u5b9a\uff0c\u5176\u4ed6\u7684\u901a\u8fc7KML-FFT\u66ff\u6362\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/34741.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-30T09:11:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091054-6811e91eb7f60.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/34741.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/34741.html\",\"name\":\"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2025-04-30T09:11:04+00:00\",\"dateModified\":\"2025-04-30T09:11:04+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/34741.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/34741.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/34741.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/34741.html","og_locale":"zh_CN","og_type":"article","og_title":"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb863\u6b21\uff0c\u70b9\u8d5e17\u6b21\uff0c\u6536\u85cf25\u6b21\u3002\u53c2\u8003\u6587\u6863\u5b9a\u4e49\uff0cintel-ipp\u5e93\u4e13\u4e3aintel\u670d\u52a1\u5668\u8bbe\u8ba1\uff0c\u9cb2\u9e4f\u57fa\u4e8e\u9cb2\u9e4f\u5904\u7406\u5668\uff0c\u8fd9\u4e9b\u51fd\u6570\u5168\u90e8\u8981\u91cd\u65b0\u66ff\u4ee3\uff0c\u67e5\u770b\u9cb2\u9e4f\u670d\u52a1\u5668\u76f8\u5173\u6587\u6863\u3001\u53d1\u73b0\u9cb2\u9e4f\u670d\u52a1\u5668\u5728FFT\u7684\u8ba1\u7b97\u4e0a\u6709KML-FFT\u5e93\u53ef\u5bf9FFT\u8fdb\u884c\u52a0\u901f\u8ba1\u7b97\u3002qt\u6211\u4eec\u4f7f\u75285.9.8\uff0c\u5f53\u7136\u5176\u4ed6\u7248\u672c\u4e5f\u662fOK\u7684\uff0c\u56e0\u4e3a\u670d\u52a1\u5668\u627e\u4e0d\u5230\u5bf9\u5e94\u7684QT-ARM\u5b89\u88c5\u5305\u3002\u9996\u5148\u662f\u7cfb\u7edf\u5b89\u88c5\uff0c\u9cb2\u9e4f\u670d\u52a1\u5668\u4f7f\u7528\u7684\u662f\u534e\u4e3a\u9cb2\u9e4f\u5904\u7406\u5668\uff0c\u57fa\u4e8eARM\u67b6\u6784\uff0c\u4e5f\u53ef\u5b89\u88c5centos\u7b49\uff0c\u5efa\u8bae\u5b89\u88c5\u534e\u4e3a\u6b27\u62c9\u7cfb\u7edf\u3002\u5f97\u3001\u7a7a\u95f4\u5f00\u8f9f\u7528C++\u6807\u51c6\u5e93\u66ff\u4ee3\uff0c\u6c42\u548c\u65b9\u5dee\u7b49\u53ef\u901a\u8fc7std\u5e93\u641e\u5b9a\uff0c\u5176\u4ed6\u7684\u901a\u8fc7KML-FFT\u66ff\u6362\u3002","og_url":"https:\/\/www.wsisp.com\/helps\/34741.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2025-04-30T09:11:04+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091054-6811e91eb7f60.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"8 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/34741.html","url":"https:\/\/www.wsisp.com\/helps\/34741.html","name":"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2025-04-30T09:11:04+00:00","dateModified":"2025-04-30T09:11:04+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/34741.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/34741.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/34741.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"windows\u7a0b\u5e8f\u8f6c\u9cb2\u9e4f\u670d\u52a1\u5668\u8e29\u5751\u8bb0\u3010\u6301\u7eed\u66f4\u65b0\u4e2d\u3011"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/34741","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=34741"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/34741\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/34727"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=34741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=34741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=34741"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=34741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} |
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091054-6811e91eb7f60.png\")
<\/li>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091055-6811e91f028a9.png\")
<\/p>\n<\/li>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091055-6811e91f34e3c.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091056-6811e9200352f.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091057-6811e9213cae1.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091057-6811e921e6bae.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250430091058-6811e9229c481.png\")
<\/p>\n