
94
N. T Thao and M. Vertterli
SINGLE-LOOP, R=4
(~ -0.5
-,/
-2
-1.5 -~ -0'.5 0 0.5
sin component
1 1.5 2
oo
~o-0.
~
DOUBLE-LOOP, R=4
......
i "
I
-2 -1.5 -1 -0.5 0 0.5 1 .5 2
sin component
(~) (b)
Figure 13: Partition defined by a ~A modulator in the 2 dimensional space of T0-periodic
sinusoids with arbitrary amplitude and phase at oversampling ratio R = 4. (a) Single-loop
case. (b) Double-loop case.
References
[1] A.V.Oppenheim and R.W.Shafer,
Discrete-Time Signal Processing.
Prentice Hall,
1989.
[2] N.S.Jayant and P.Noll,
Digital Coding of Waveforms.
Prentice-Hall, 1984.
[3] W.R.Bennett, ...