Jittered random sampling with a successive approximation ADC

Chenchi Eric Luo, Lingchen Zhu
2014 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
This paper proposes a randomly jittered temporal sampling scheme with a successive approximation register (SAR) ADC. The sampling time points are jittered around a uniform sampling clock. A control logic is implemented on a traditional SAR ADC to force it to terminate the sample conversion before reaching the full precision at the jittered time points. As a result, variable word length data samples are produced by the SAR converter. Based on a discrete jittered random sampling theory, this
more » ... analyzes the impact of the random jitters and the resulting randomized quantization noise for a class of sparse or compressible signals. A reconstruction algorithm called Successive Sine Matching Pursuit (SSMP) is proposed to recover spectrally sparse signals when sampled by the proposed SAR ADC at a sub-Nyquist rate. Index Terms-successive approximation, discrete jittered random sampling
doi:10.1109/icassp.2014.6853908 dblp:conf/icassp/LuoZ14 fatcat:gppjt4fksje6zespkfxy3got24