3 problems

Consider recovery from measurements for signals sparse in a redundant dictionary, in the setting where the current analysis incurs a logarithmic factor and the corresponding synthe…

Let $L$ denote the parameter governing the current measurement bound and let $r=N/n$ be the redundancy of the dictionary, where $N$ is the number of dictionary elements and $n$ is…

A linear measurement of a signal is identified only up to a factor of unit modulus, so injective magnitude measurements are understood modulo a global phase. For an $n$-dimensional…