Memorias de investigación
Research Publications in journals:
Improved Interval-Based Characterization of Fixed-Point LTI Systems with Feedback Loops
Year:2007

Research Areas
  • Processing and signal analysis

Information
Abstract
Traditional approaches for fixed-point characterization are based on long simulations or additive noise models that do not show the non-linear behavior of the quantization operations in reasonable time. In this paper, a novel interval-based approach that provides both tighter and faster results than the existing approaches is presented. It is based on a non-linear adaptation of the quantization operations of Affine Arithmetic. The results obtained with this method are compared to other published interval-based approaches, and the problem of interval oversizing is discussed in detail. Simulations show (i) that propagation techniques are not well suited to characterize quantized linear systems with feedback loops, (ii) that Affine Arithmetic provides oversized bounds in this type of systems, and (iii) that the proposed adaptation does not provide guaranteed bounds as in traditional interval-based computations, but it provides tighter estimates of the evolution in time of the ranges of the fixed-point signals and better runtime than the existing interval-based characterization techniques.
International
Si
JCR
Si
Title
IEEE T COMPUT AID D
ISBN
0278-0070
Impact factor JCR
0,776
Impact info
Volume
26
Journal number
11
From page
1923
To page
1933
Month
SIN MES
Ranking
Participants

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Laboratorio de Sistemas Integrados (LSI)
  • Departamento: Ingeniería Electrónica