- TITLE:
-
Space-Time Vector Delta-Sigma Modulation
- AUTHORS:
- Dan P. Scholnik
J. O. Coleman
- ABSTRACT:
- Classical delta-sigma modulation gains resolution
through temporal oversampling by using a high-speed,
low-resolution quantizer and shaping the resulting
quantization errors out of the signal band. Likewise,
spatial delta-sigma modulation is often used in image
halftoning to create high-visual-quality binary
images. We consider combining spatial and temporal
delta-sigma modulation to reduce temporal oversampling
requirements in high-SNR antenna transmit arrays using
simple high-power switches as the output amplifiers.
We introduce a vector delta-sigma architecture that
allows noise shaping jointly in both temporal and
spatial frequency. The two-dimensional
pseudo-shift-invariant delta-sigma architecture
commonly used for image halftoning is realized as a
special case, and we consider when such a simplified
model may be appropriate.
- DOWNLOADABLE PREPRINT:
-
PDF (158K),
- STATUS:
- Presented to the
2002 IEEE International Symposium on Circuits and Systems (ISCAS 2002), Scottsdale AZ,
USA, May 26-29, 2002.
- DATE OF ENTRY:
-
May 2002.