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Авторизация |
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Sundararajan D. — The discrete fourier transform: theory, algorithms and applications |
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Предметный указатель |
Aliasing 197 226 254
Aliasing, folding frequency 227
Aliasing, folding of frequencies 229
Aliasing, highest frequency component 227
Aliasing, reducing the aliasing effect 231
Aliasing, sampling frequency 227
Aliasing, sampling rate 227
Aliasing, sampling theorem 227
Aliasing, time-domain 228
Antihermitian symmetry 71
Basis functions, DCT 304
Basis functions, DFT 40
Basis functions, DWT 314
Basis functions, NDHT 320
Basis functions, SDHT 326
Bit-reversal 343
Bit-reversal, algorithm 345
Bit-reversal, bit-reversed order 128 344
Bit-reversal, number system 343
Butterfly computation 123
Complete representation 58
Complex amplitude 22
Complex exponential function 22 46 199 337
complex numbers 333
Complex numbers, argument 335
Complex numbers, exponential form 335
Complex numbers, imaginary part 334
Complex numbers, imaginary unit 334
Complex numbers, magnitude 335
Complex numbers, operations, addition 334
Complex numbers, operations, conjugation 335
Complex numbers, operations, multiplication 335
Complex numbers, operations, subtraction 334
Complex numbers, polax form 335
Complex numbers, real part 334
Complex numbers, rectangular form 334
Complex numbers, roots 336
Complex plane 333
Computation of a single DFT coefficient 130
Computational complexity 341
Continuous-time signal 7
Convergence 251
Convolution 2—D, circular 296
Convolution 2—D, circular, spatial frequency-domain 209
Convolution 2—D, circular, spatial time-domain 208
Convolution 2—D, linear 295
Convolution 2—D, overlap-save method 296
Convolution, circular 289
Convolution, frequency-domain 84
Convolution, linear 288
Convolution, overlap-save method 292
Convolution, simulation by DFT 290
Convolution, time-domain 83
Correlation 298
Correlation, circular, auto 85 210
Correlation, circular, cross 85 209
Cosine function 8 12 47 200 337
DCT (see Discrete cosine transform)
Decimation-in-frequency 114 132
Decimation-in-time 108 132
DFT (see Discrete Fourier transform)
Digital signal 8
Dirichlet conditions 249
Discontinuity 251
Discrete cosine transform 2—D 309
Discrete cosine transform, basis functions 305
Discrete cosine transform, computation using the DFT 306
Discrete cosine transform, computational complexity 309
Discrete cosine transform, definition 305
Discrete cosine transform, orthogonality 304
Discrete Fourier transform 2—D, center-zero format 196
Discrete Fourier transform 2—D, complex exponential 199
Discrete Fourier transform 2—D, computation algorithms 212
Discrete Fourier transform 2—D, computation real data 217
Discrete Fourier transform 2—D, computation row-column method 202
Discrete Fourier transform 2—D, definition 195
Discrete Fourier transform 2—D, impulse 197
Discrete Fourier transform 2—D, properties (see properties of the 2—D DFT)
Discrete Fourier transform 2—D, real sinusoid 199
Discrete Fourier transform, basis functions 40
Discrete Fourier transform, center-zero format 43
Discrete Fourier transform, complex exponential 46
Discrete Fourier transform, computation with vectors 101
Discrete Fourier transform, dc 45
Discrete Fourier transform, definition 37 38
Discrete Fourier transform, direct computation 51
Discrete Fourier transform, direct implementation 51
Discrete Fourier transform, frequency increment 40
Discrete Fourier transform, Hann function 49
Discrete Fourier transform, impulse 44
Discrete Fourier transform, kernel matrix 43
Discrete Fourier transform, properties (see Properties of the DFT)
Discrete Fourier transform, real data, algorithm for complex data 163
Discrete Fourier transform, real data, single real data set 169
Discrete Fourier transform, real data, two real data sets 166
Discrete Fourier transform, real sinusoid 46
Discrete Fourier transform, rectangular waveform 49
Discrete Fourier transform, vector format 96 99 100
Discrete signal 7
Discrete Walsh transform 313
Discrete Walsh transform 2—D 318
Discrete Walsh transform, basis functions 314
Discrete Walsh transform, definition 313
Discrete Walsh transform, orthogonality 315
Discrete Walsh transform, PM DWT algorithm 316
Discrete Walsh transform, sequency 314
DWT (see discrete Walsh transform)
Euler’s identity 337
Even function 15 71
Even half-wave symmetry 71
Finality of coefficients 57
Fourier analysis 32
Fourier Series, 1—D 249
Fourier Series, 1—D, aliasing effect 254
Fourier Series, 1—D, approximatation by DFT 253
Fourier Series, 1—D, continuous-time frequency 257 260
Fourier Series, 1—D, convergence 251
Fourier Series, 1—D, Dirichlet conditions 249
Fourier Series, 1—D, exponential form 250
Fourier Series, 1—D, Gibbs phenomenon 251 261
Fourier Series, 1—D, sample value at a discontinuity 257
Fourier Series, 1—D, trigonometric form 250
Fourier Series, 1—D, waveform reconstruction 259
Fourier Series, 2—D 262
Fourier synthesis 32 35
Fourier transform 2—D 282
Fourier transform, 1—D 273
Fourier transform, 1—D, approximation by DFT 277
Fourier transform, 1—D, complex exponential 276
Fourier transform, 1—D, dc signal 276
Fourier transform, 1—D, definition 276
Fourier transform, 1—D, impulse 276
Fourier transform, 1—D, limiting case of the FS 273
Fourier transform, 1—D, pulse 275 277
Fourier transform, 1—D, real sinusoid 276
Fourier transform, 1—D, relation between FS and FT 275 277
Fourier transform, 1—D, signal reconstruction 281
Frequency composition, 1—D real signals 37
Frequency composition, 2—D real signals 196
Frequency-domain 10
Gibbs phenomenon 251 261
Hamming window 240
Hann window 239
Hermitian symmetry 71
IDFT (see Inverse discrete Fourier transform)
Impulse 9
Inverse discrete Fourier transform, center-zero format 196
Inverse discrete Fourier transform, computation using DFT 104 111
Inverse discrete Fourier transform, definition 195
Inverse discrete Fourier transform, direct computation 51
| Inverse discrete Fourier transform, vector format 104
Inverse discrete Walsh transform, definition 316
Inverse naturally ordered discrete, Hadamaxd transform 322
Inverse sequency ordered discrete, Hadamaxd transform 326
Leakage effect 231
Leakage effect, frequency response, DFT 235
Leakage effect, frequency response, rectangular and Hann windows 240
Leakage effect, Multiplication of the signal with a rectangular window 233
Leakage effect, reduction of leakage 244
Leakage effect, spectral resolution 241
Leakage effect, windows (see Windows)
Least squares error 55—57 257
L’Hopital’s Rule 263 356
Naturally ordered discrete Hadamard, basis functions 320
Naturally ordered discrete Hadamard, definition 320
Naturally ordered discrete Hadamard, kernel generation 321
Naturally ordered discrete Hadamard, PM NDHT algorithm 322
Naturally ordered discrete Hadamard, transform 320
Naturally ordered discrete Hadamard, transform 2—D 323
NDHT (see Naturally ordered discrete)
Odd function 15 71
Odd half-wave symmetry 71
Orthogonality 24 26
Orthogonality, complex exponential 26
Orthogonality, cosines over half-cycles 304
Orthogonality, trigonometric functions 24
Orthogonality, Walsh function 315
Overlap-save method 292 296
Parseval’s theorem 90 212
periodicity 62
Phase shift 11 12
Picket-fence effect 244
Picket-fence effect, denser spectrum 245
PM DFT Algorithms, classification 114
PM DIF DFT algorithms, PM DIF DFT algorithm 134
PM DIF DFT algorithms, PM DIF DFT algorithm, butterfly 134
PM DIF DFT Algorithms, PM DIF DFT algorithm, compression of data vectors 113
PM DIF DFT algorithms, PM DIF DFT algorithm, computational stages 135
PM DIF DFT Algorithms, PM DIF DFT algorithm, shift of transform vectors 112
PM DIF DFT algorithms, PM DIF DFT algorithm 154
PM DIF DFT algorithms, PM DIF DFT algorithm, butterfly 157
PM DIF DFT algorithms, PM DIF DFT algorithm, computational stages 157
PM DIF DFT algorithms, PM DIF DFT algorithms 132
PM DIF DFT algorithms, PM DIF DFT algorithms, butterfly 133
PM DIF DFT algorithms, PM DIF DFT algorithms, computational stages 134
PM DIF DFT Algorithms, fundamentals 112
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms 180
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms, butterfly 183
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms, computational stages 184
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms, special butterflies 184
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms 190
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms, butterfly 190
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms, computational stages 191
PM DIF RIDFT algorithms, PM DIF RIDFT algorithms, special butterflies 192
PM DIF RIDFT algorithms, storage of data 176
PM DIT DFT algorithms, PM DIT DFT algorithm 125
PM DIT DFT algorithms, PM DIT DFT algorithm, butterfly 125
PM DIT DFT algorithms, PM DIT DFT algorithm, computation of a single DFT coefficient 130
PM DIT DFT algorithms, PM DIT DFT algorithm, computational complexity 135
PM DIT DFT algorithms, PM DIT DFT algorithm, computational stages 126
PM DIT DFT algorithms, PM DIT DFT algorithm, flow chart description 141
PM DIT DFT algorithms, PM DIT DFT algorithm, implementation issues 148
PM DIT DFT algorithms, PM DIT DFT algorithm, reordering of the input data 128
PM DIT DFT algorithms, PM DIT DFT algorithm 151
PM DIT DFT algorithms, PM DIT DFT algorithm, butterfly 153
PM DIT DFT algorithms, PM DIT DFT algorithm, computational complexity 158
PM DIT DFT algorithms, PM DIT DFT algorithm, computational stages 154 6
PM DIT DFT algorithms, PM DIT DFT algorithm 138
PM DIT DFT algorithms, PM DIT DFT algorithm, butterfly 139
PM DIT DFT algorithms, PM DIT DFT algorithm, computational complexity 140
PM DIT DFT algorithms, PM DIT DFT algorithm, computational stages 140
PM DIT DFT algorithms, PM DIT DFT algorithm 122
PM DIT DFT algorithms, PM DIT DFT algorithm, butterfly 123
PM DIT DFT algorithms, PM DIT DFT algorithm, computational stages 124
PM DIT DFT Algorithms, fundamentals 106
PM DIT DFT Algorithms, shift of data vectors 106
PM DIT DFT Algorithms, zero padding of data vectors 107
PM DIT RDFT algorithms, PM DIT RDFT algorithms 176
PM DIT RDFT algorithms, PM DIT RDFT algorithms, butterfly 177
PM DIT RDFT algorithms, PM DIT RDFT algorithms, computational stages 178
PM DIT RDFT algorithms, PM DIT RDFT algorithms, special butterflies 178
PM DIT RDFT algorithms, PM DIT RDFT algorithms 187
PM DIT RDFT algorithms, PM DIT RDFT algorithms, butterfly 187
PM DIT RDFT algorithms, PM DIT RDFT algorithms, computational stages 187
PM DIT RDFT algorithms, PM DIT RDFT algorithms, special butterflies 189
PM DIT RDFT algorithms, comparison with DFT algorithms 193
PM DIT RDFT algorithms, storage of data 175
Prime-factor DFT algorithm 139 347
Properties of the 2—D DFT, complex conjugates 208
Properties of the 2—D DFT, convolution (see Convolution)
Properties of the 2—D DFT, correlation (see Correlation)
Properties of the 2—D DFT, difference 210
Properties of the 2—D DFT, image rotation 210
Properties of the 2—D DFT, linearity 205
Properties of the 2—D DFT, Parseval’s theorem 212
Properties of the 2—D DFT, periodicity 205
Properties of the 2—D DFT, reversal property 207
Properties of the 2—D DFT, separable signals 211
Properties of the 2—D DFT, spatial circular shift of a spectrum 206
Properties of the 2—D DFT, spatial circular shift of an image 206
Properties of the 2—D DFT, sum and difference of sequences 210
Properties of the 2—D DFT, symmetry 207
Properties of the DFT, circular shift of a spectrum 66
Properties of the DFT, circular shift of a time sequence 62
Properties of the DFT, complex conjugates 81
Properties of the DFT, DFT of overlapping segments 66
Properties of the DFT, DFT twice in succession 70
Properties of the DFT, duality 71
Properties of the DFT, linearity 61
Properties of the DFT, padding the data with zeros 86
Properties of the DFT, padding the data with zeros at the end 86
Properties of the DFT, padding the data with zeros in between the samples 89
Properties of the DFT, Parseval’s theorem 90
Properties of the DFT, periodicity 62
Properties of the DFT, signal defined over a finite range 80
Properties of the DFT, sum and difference of sequences 85
Properties of the DFT, symmetry, complex signal 78
Properties of the DFT, symmetry, complex signal, even 78
Properties of the DFT, symmetry, complex signal, even half-wave 80
Properties of the DFT, symmetry, complex signal, odd 80
Properties of the DFT, symmetry, complex signal, odd half-wave 80
Properties of the DFT, symmetry, imaginary signal 75
Properties of the DFT, symmetry, imaginary signal, even 76
Properties of the DFT, symmetry, imaginary signal, even half-wave 76
Properties of the DFT, symmetry, imaginary signal, odd 76
Properties of the DFT, symmetry, imaginary signal, odd half-wave 78
Properties of the DFT, symmetry, symmetry, real signal 72
Properties of the DFT, symmetry, symmetry, real signal, even 74
Properties of the DFT, symmetry, symmetry, real signal, even half-wave 75
Properties of the DFT, symmetry, symmetry, real signal, odd 74
Properties of the DFT, symmetry, symmetry, real signal, odd half-wave 75
Properties of the DFT, symmetry, time-reversal 69
Rectangular window 236
Roots of unity 40 336
Rotating vector 339
Row-column method 202 309
Sampling frequency 227
Sampling rate 227
Sampling theorem 227
SDHT (see Sequency ordered discrete Hadamaxd transform)
Sequency 314
Sequency ordered discrete Hadamard, basis functions 326
Sequency ordered discrete Hadamard, definition 325
Sequency ordered discrete Hadamard, PM SDHT algorithm 327
Sequency ordered discrete Hadamard, transform 325
Sequency ordered discrete Hadamard, transform 2—D 328
Signal representation, frequency-domain 10 11
Signal representation, time-domain 7 10 11
Signal, continuous-time 7
Signal, digital 8
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