A Modem Implementation Using a Periodically Time Varying Digital Filter

Hidekazu  TANAI  Rokuya ISHII  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E74-A   No.11   pp.3569-3575
Publication Date: 1991/11/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Issue on HAKONE Digital Signal Processing Symposium)
Category: 
Keyword: 


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Summary: 
This paper presents a new method for implementing modem by using a periodically time varying digital filter. Firstly, we present that a modulation and a demodulation are realized by using a periodically time varying digital filter (abbreviated to a PTV filter). Next, we present that these functions of a modem can be implemented in one PTV filter. Generally, it is very complicated to search the shifted carrier frequency of a transfered modulated signal. Since only a PTV filter are used in the proposed system, we do not need to search the shifted carrier frequency in modem. So, the proposed method is better than the conventional method in this point.