We address the problem of compressed sensing (CS) with prior information: reconstruct a target CS signal with the aid of a similar signal that is known beforehand, our prior information. We integrate the additional knowledge of the similar signal into CS via â„“1-â„“1 and â„“1-â„“2 minimization. We then establish bounds on the number of measurements required by these problems to successfully reconstruct the original signal. Our bounds and geometrical interpretations reveal that if the prior information has good enough quality, â„“1-â„“1 minimization improves the performance of CS dramatically. In contrast, â„“1- â„“2 minimization has a performance very similar to classical CS and brings no significant benefits. In addition, we use the insight provided by our bounds to design practical schemes to improve prior information. All our findings are illustrated with experimental results.
Mota, J, Deligiannis, N & Rodrigues, M 2017, 'Compressed sensing with prior Information: Strategies, geometry, and bounds', IEEE Transactions on Information Theory, vol. 63, no. 7, 7904593, pp. 4472-4496. https://doi.org/10.1109/TIT.2017.2695614
Mota, J., Deligiannis, N., & Rodrigues, M. (2017). Compressed sensing with prior Information: Strategies, geometry, and bounds. IEEE Transactions on Information Theory, 63(7), 4472-4496. Article 7904593. https://doi.org/10.1109/TIT.2017.2695614
@article{2e9d9cb63b4e4d4d9684c35db4ae9f52,
title = "Compressed sensing with prior Information: Strategies, geometry, and bounds",
abstract = "We address the problem of compressed sensing (CS) with prior information: reconstruct a target CS signal with the aid of a similar signal that is known beforehand, our prior information. We integrate the additional knowledge of the similar signal into CS via â„“1-â„“1 and â„“1-â„“2 minimization. We then establish bounds on the number of measurements required by these problems to successfully reconstruct the original signal. Our bounds and geometrical interpretations reveal that if the prior information has good enough quality, â„“1-â„“1 minimization improves the performance of CS dramatically. In contrast, â„“1- â„“2 minimization has a performance very similar to classical CS and brings no significant benefits. In addition, we use the insight provided by our bounds to design practical schemes to improve prior information. All our findings are illustrated with experimental results.",
keywords = "Compressed sensing, Gaussian width., basis pursuit, prior information, â„“ -â„“ and â„“ -â„“ minimization",
author = "Joao Mota and Nikolaos Deligiannis and Miguel Rodrigues",
year = "2017",
month = jul,
doi = "10.1109/TIT.2017.2695614",
language = "English",
volume = "63",
pages = "4472--4496",
journal = "IEEE Transactions on Information Theory",
issn = "0018-9448",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",
}