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Registered SIGNAL TRANSMISSION APPARATUS AND OPTICAL MODEM MODULATION METHOD
- Inventors
- Cho-Seung-Hyun, Jie Hyun Lee, Myong Seung Il, Jung Eui Suk, Lee Sang Soo, Kim Kwang Ok, Lee Jong Hyun
- Application No.
- 13729521 (2012.12.28)
- Publication No.
- 20130170830 (2013.07.04)
- Registration No.
- 9130675 (2015.09.08)
- Country
- UNITED STATES
- Project Code
- 11VI1400, Wired and Wireless converged access network based on OFDMA-PON with 10 Gb/s line rate, Myong Seung Il
- Abstract
- A modulation method of an optical modem and a signal transmission apparatus performing the method are disclosed. The modulation method of the optical modem includes an optical interface providing a signal to a light source, a photo detector receiving reflected light by an optical link when output light from the light source based on the provided signal is reflected by the optical link, the photo detector measuring and determining characteristics of the optical link using the reflected light, and the optical modem determining a power level and a modulation method for each subcarrier based on the characteristics of the optical link.
- KSP Keywords
- Light source, Modulation method, Optical Modem, Optical interface, Optical link, Orthogonal frequency division multiple access passive optical network(OFDMA-PON), Power Levels, Reflected light, Signal transmission, photo detector