An Efficient Algorithm for Measuring the Impulse Response Using Pseudorandom Noise

Borish J, Angell JB. An Efficient Algorithm for Measuring the Impulse Response Using Pseudorandom Noise. J Audio Eng Soc. 1983;31(7/8):478-488. Available from: https://aes.org/publications/elibrary-page/?id=4564

@article{Borish1983_4564,
  author = {Borish, Jeffrey and Angell, James B.},
  title = {{An Efficient Algorithm for Measuring the Impulse Response Using Pseudorandom Noise}},
  journal = {Journal of the Audio Engineering Society},
  volume = {31},
  number = {7/8},
  pages = {478--488},
  year = {1983},
  month = aug,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=4564}
}

TY  - JOUR
TI  - An Efficient Algorithm for Measuring the Impulse Response Using Pseudorandom Noise
AU  - Borish, Jeffrey
AU  - Angell, James B.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 31
IS  - 7/8
SP  - 478
EP  - 488
PY  - 1983
DA  - 1983/08/06
UR  - https://aes.org/publications/elibrary-page/?id=4564
PB  - Audio Engineering Society
LA  - en
AB  - The impulse response of a linear system can be determined by exciting the system with white noise, and cross-correlating the input and output. As contrasted with the straightforward technique suing an impulsive excitation, this approach is capable of providing vastly superior dynamic range. In order to minimize the amount of computation required by the cross-correlation step, the system can be excited by a binary maximal-length sequence, and the cross correlation performed using the fast Hadamard transform. By this means, only additions are required, and the number of additions is approximately 2.5n log(2) n, where n is the length of the sequence.
ER  -