Weighted Eigenfunction Estimates with Applications to Compressed Sensing
Weighted Eigenfunction Estimates with Applications to Compressed Sensing
复制标题
加权特征函数估计及其在压缩感知中的应用
DOI:
10.1137/110858604
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
M. Zworski
中科院分区:
文献类型:
--
作者:
N. Burq;S. Dyatlov;Rachel A. Ward;M. Zworski
Using tools from semiclassical analysis, we give weighted L^\infty estimates for eigenfunctions of strictly convex surfaces of revolution. These estimates give rise to new sampling techniques and provide improved bounds on the number of samples necessary for recovering sparse eigenfunction expansions on surfaces of revolution. On the sphere, our estimates imply that any function having an s-sparse expansion in the first N spherical harmonics can be efficiently recovered from its values at m > s N^(1/6) log^4(N) sampling points.