1. Research Area

  Owing to rapid development of the semiconductor industry and increase in demand for multimedia services, there has been additional interest in construction of high speed data communication networks and mobile communication systems which can transmit huge amount of data as fast as possible. In order to store, recover and transmit the data efficiently with the restriction of limited resources, digital signals should be processed appropriately to fit the various recording and/or transmission channels and communication environments. For the purpose of achieving these x-objectives, the following research activities in the fields of coding and decoding, modulation and demodulation , signal transmission and processing are carried out in the Advanced Broadcasting & Communications Laboratory(ABC). ~Owing to rapid development of the semiconductor industry and increase in demand for multimedia services, there has been additional interest in construction of high speed data communication networks and mobile communication systems which can transmit huge amount of data as fast as possible. In order to store, recover and transmit the data efficiently with the restriction of limited resources, digital signals should be processed appropriately to fit the various recording and/or transmission channels and communication environments. For the purpose of achieving these x-objectives, the following research activities in the fields of coding and decoding, modulation and demodulation , signal transmission and processing are carried out in the Advanced Broadcasting & Communications Laboratory(ABC).

2. Research Overview

- Field 1 : Coding and Decoding

 Research is already underway on optimizing error control line codes which combine error control and line codes into single codes and many research results have been published and presented in various domestic and international journals as well as at conferences. More recently, Low Density Paity Codes which are known to be the most powerful error correcting codes up to now is a major research concern.

- Field 2 : Digital Modulation and Demodulation

 In the field of modulation and demodulation, the topics studied are coded orthogonal frequency division multiplexing(COFDM) for future digital broadcasting systems, polarization shift keying(POLSK) which is an efficient multilevel modulation scheme for optical communication systems, multicarrier modulation(MCM) which can utilize efficiently the limited bandwidth of the conventional communication channels. Adaptive modulation schemes which can give better performance on time varying channels such as mobile communication systems are also the key research topics like the adaptive coding.