High-Speed A/D Conversion for Ultra-Wideband Signals Based on Signal Projection over Basis Functions Conference Paper uri icon

abstract

  • This paper introduces techniques to perform analog to digital (A/D) conversion, based on the quantization of the coefficients obtained by the projection of a continuous-time signal over an orthogonal space. This framework for A/D conversion is motivated by the sampling of an input signal in domains which may lead to lower levels of signal distortion and significantly less demanding A/D conversion characteristics. The A/D conversion distortion is reduced by assigning optimal bit rates according to the variance distribution of the coefficients. Moreover, since the quantization of the coefficients is realized at the end of a time window during which the signal is projected, the speed of the quantizers can be much lower than the one needed in conventional time-domain ADCs. In particular, we study ADC in the frequency domain which overcomes some of the difficulties encountered with conventional time-domain A/D conversion of signals with very large bandwidths, such as ultra-wideband (UWB) signals.

name of conference

  • 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing

published proceedings

  • 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing

author list (cited authors)

  • Hoyos, S., Sadler, B. M., & Arce, G. R.

citation count

  • 12

complete list of authors

  • Hoyos, Sebastian||Sadler, Brian M||Arce, Gonzalo R

publication date

  • January 2004