Paper Info
Title
The impact of ADC nonlinearity in a mixed-signal compressive sensing system for frequency-domain sparse signals.
Abstract
Compressive sensing (CS) holds new promises for the digitization of wideband frequency-domain sparse signals at sub-Nyquist rate sampling without compromising the reconstruction quality. In this paper, the impact of ADC nonlinearity in a CS receiver for frequency-domain sparse signals is investigated. In a mixed-signal CS system, signals are randomized before sampling. The signal spectrum at each building block in the mixed-signal CS system is analyzed and compared to a conventional Nyquist-rate sampling system. It is shown that the signal randomization in a mixed-signal CS system is able to spread the spurious energy due to ADC nonlinearity along the signal bandwidth, rather than the concentration of harmonic distortion on a few frequencies as it is the case for a conventional ADC. As a result, this paper shows that a significant ADC SFDR (Spurious Free Dynamic Range) improvement is achieved in a CS receiver when processing sparse signals. Simulation results are reported which are in good agreement with the qualitative analysis.
Year
DOI
Venue
2012
10.1016/j.phycom.2011.10.007
Physical Communication
Keywords
Field
DocType
Mixed-signal,Compressive sensing,Nonlinearity,Randomization,SFDR (Spurious Free Dynamic Range)
Frequency domain,Wideband,Total harmonic distortion,Telecommunications,Computer science,Real-time computing,Spurious-free dynamic range,Electronic engineering,Bandwidth (signal processing),Sampling (statistics),Mixed-signal integrated circuit,Compressed sensing
Journal
Volume
Issue
ISSN
5
2
1874-4907
Citations 
PageRank 
References 
5
0.74
26
Authors
5
Name
Order
Citations
PageRank
Zhuizhuan Yu114511.51
Jun Zhou250.74
Mario A. Ramirez3111.56
Sebastian Hoyos423429.24
Brian M. Sadler53179286.72