Explicit constructions for compressed sensing of sparse signals

  • Authors:
  • Piotr Indyk

  • Affiliations:
  • MIT

  • Venue:
  • Proceedings of the nineteenth annual ACM-SIAM symposium on Discrete algorithms
  • Year:
  • 2008

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Abstract

Over the recent years, a new approach for obtaining a succinct approximate representation of n-dimensional vectors (or signals) has been discovered. For any signal x, the succinct representation of x is equal to Ax, where A is a carefully chosen R x n real matrix, R ≪ n. Often, A is chosen at random from some distribution over R x n matrices. The vector Ax is often refered to as the measurement vector or a sketch of x. Although the dimension of Ax is much shorter than of x, it contains plenty of useful information about x.