Linear Transformations and Restricted Isometry Property

Details Linear Transformations and Restricted Isometry Property Linear Transformations and Restricted Isometry Property

2009-01-05

arxiv.org/abs/0901.0541v1

Computer Science

Information Theory

Scientific paper

The Restricted Isometry Property (RIP) introduced by Cand\'es and Tao is a fundamental property in compressed sensing theory. It says that if a sampling matrix satisfies the RIP of certain order proportional to the sparsity of the signal, then the original signal can be reconstructed even if the sampling matrix provides a sample vector which is much smaller in size than the original signal. This short note addresses the problem of how a linear transformation will affect the RIP. This problem arises from the consideration of extending the sensing matrix and the use of compressed sensing in different bases. As an application, the result is applied to the redundant dictionary setting in compressed sensing.

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