제어로봇시스템학회:학술대회논문집
- 2004.08a
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- Pages.1355-1359
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- 2004
Improved Method of Characteristics for Two way Subscriber Transmission Systems
- Phetsomphou, Douangsamone (Course of Electrical Engineering, Tokai University) ;
- Tsuchiya, Naosuke (Course of Electrical Engineering, Tokai University) ;
- Tanaka, Kimio (Department of Communications Engineering, Tokai University)
- Published : 2004.08.25
Abstract
The two way subscriber transmission systems have tendency to spread its carrier frequency bandwidth or information bit rate and average bit error rate according to popularization of high speed information through the digital communication system, transmission medium and the Internet. This fact is an important incentive to realize new systems. These two way subscriber transmission systems usually use same cable or same carrier frequency bandwidth for up stream channel and down stream channel. In the systems, the disturbances of noise, crosstalk or fading affect the characteristics. Specifically, these disturbances cause the decrease of information bit rate and degradation of transmission quality. This paper proposes the improved method of their degradations using the particular feature of two way subscriber transmission systems and it makes clear proposed method is effective by theoretically and some numerical examples.
Keywords
- two way subscriber transmission system;
- information bit rate;
- bit error rate;
- error correcting code;
- quadrature amplitude modulation;
- discrete multi-tone transmission