arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1506.03040cs.ITmath.IT
收藏

零空间性质与限制等距性质之间的差距

The gap between the null space property and the restricted isometry property

Jameson Cahill, Xuemei Chen, Rongrong Wang

摘要:

零空间特性(NSP)和限制等距特性(RIP)是压缩感知领域中受到广泛关注的两个特性。顾名思义,NSP是仅取决于测量过程的零空间的属性,因此,具有相同零空间的任何两个矩阵将具有NSP,如果它们中的任何一个具有相同零空间。另一方面,RIP是测量过程本身的属性,并且给定RIP矩阵,可以直接构造另一个具有相同零空间的矩阵,该矩阵不是RIP。此外,RIP被认为意味着NSP,因此RIP是比NSP严格更强的假设。我们说一个矩阵是RIP-NSP,如果它有相同的零空间作为RIP矩阵。我们表明,这样的矩阵可以提供强大的恢复基础追求下的可压缩信号,在许多适用的设置相媲美的保证RIP提供。更重要的是,我们建设性地表明,RIP-NSP是强于NSP的帮助下,这个强大的恢复结果,这表明,RIP是从根本上强于NSP。

英文摘要:

The null space property (NSP) and the restricted isometry property (RIP) are two properties which have received considerable attention in the compressed sensing literature. As the name suggests, NSP is a property that depends solely on the null space of the measurement procedure and as such, any two matrices which have the same null space will have NSP if either one of them does. On the other hand, RIP is a property of the measurement procedure itself, and given an RIP matrix it is straightforward to construct another matrix with the same null space that is not RIP. %Furthermore, RIP is known to imply NSP and therefore RIP is a strictly stronger assumption than NSP. We say a matrix is RIP-NSP if it has the same null space as an RIP matrix. We show that such matrices can provide robust recovery of compressible signals under Basis pursuit which in many applicable settings is comparable to the guarantee that RIP provides. More importantly, we constructively show that the RIP-NSP is stronger than NSP with the aid of this robust recovery result, which shows that RIP is fundamentally stronger than NSP.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑