Fundamental Properties of Asynchronous Multiplexing for Fiber Optic Adaptive Digital Transmission

Yoshitaka TAKASAKI  Mitsuo TANAKA  Katsuyuki NAGANO  Yasushi TAKAHASHI  

IEICE TRANSACTIONS (1976-1990)   Vol.E64   No.3   pp.109-114
Publication Date: 1981/03/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Transmission Systems

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Candidate plans for adaptive digital transmission are briefly reviewed. It is suggested that adaptive format transmission with asynchronous multiplexing capability is attractive and promising from the standpoint of practical application. Feasibility and efficiency of this new transmission plan are investigated. A formula for predicting the minimum required transmission rate is derived. Upper and lower bounds of transmission efficiencies are analysed. A signal distributing technique for improving transmission efficiency is also developed. Investigation of memory requirements anticipates the possibility of simple implementations for format conversion and reconversion. Results of simulations prove the reliability of theoretical predictions. Fiber optic transmission is expected to be suitable for realizing this new communications concept.