Title :
Information Theoretical and Algorithmic Approaches to Quantized Compressive Sensing
Author :
Dai, Wei ; Milenkovic, Olgica
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London, UK
fDate :
7/1/2011 12:00:00 AM
Abstract :
We study the average distortion introduced by scalar, vector, and entropy coded quantization of compressive sensing (CS) measurements. The asymptotic behavior of the underlying quantization schemes is either quantified exactly or characterized via bounds. We adapt two benchmark CS reconstruction algorithms to accommodate quantization errors, and empirically demonstrate that these methods significantly reduce the reconstruction distortion when compared to standard CS techniques.
Keywords :
data compression; distortion; signal reconstruction; vector quantisation; CS reconstruction algorithms; entropy coded quantization; quantized compressive sensing; reconstruction distortion; scalar coded quantization; vector quantization; Distortion; Distortion measurement; Encoding; Quantization; Rate distortion theory; Reconstruction algorithms; Upper bound; Compressive sensing; distortion rate function; quantization; subspace pursuit;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2011.051711.100204