The impact of ADC nonlinearity in a mixed-signal compressive sensing system for frequency-domain sparse signals Academic Article uri icon


  • 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. 2011.

published proceedings

  • Physical Communication

author list (cited authors)

  • Yu, Z., Zhou, J., Ramirez, M., Hoyos, S., & Sadler, B. M.

citation count

  • 10

complete list of authors

  • Yu, Zhuizhuan||Zhou, Jun||Ramirez, Mario||Hoyos, Sebastian||Sadler, Brian M

publication date

  • January 2012