Summary
International Symposium on Nonlinear Theory and its Applications
2009
Session Number:A4L-C
Session:
Number:A4L-C3
Steady-State Analysis of Delay-Locked Loop by Discrete Path Integral Method
Keisuke Nagata, Yuji Ohba, Hisato Fujisaka, Takeshi Kamio, Chang-Jun Ahn, Kazuhisa Haeiwa,
pp.-
Publication Date:2009/10/18
Online ISSN:2188-5079
Summary:
This paper presents steady tracking error analysis of delay-locked loops used in code division multiple access (CDMA) communications with Markovian spreading codes. Regarding the spreading codes and multiple access interference (MAI) as Markovian probabilistic processes, we describe the DLLs by stochastic difference equations. We then computed probability distribution of the steady tracking error by applying path integral analysis to the equations. From the obtained distribution, we assert that Markovian codes which mitigate the influence of MAI do not always decrease the steady tracking error both in chip-synchronous and asynchronous communications.