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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document : 9 / 21 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) Multipath¸¦ °í·ÁÇÑ ¼öÁß¿µ»ó Àü¼Û ½Ã½º´ï ¼³°è
¿µ¹®Á¦¸ñ(English Title) A Design of Acoustic ìébased Underwater Image Transmission System Based on the Multipath Analysis.
ÀúÀÚ(Author) ÀÓ¿ë°ï   ¹ÚÁ¾¿ø   ÃÖ¿µÃ¶   Yong-Kon Lim   Jong-Won Park   Young-Chol Choi  
¿ø¹®¼ö·Ïó(Citation) VOL 05 NO. 01 PP. 0202 ~ 0211 (2001. 05)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®Àº ¼öÁß¿¡¼­ ÃÊÀ½Æĸ¦ ÀÌ¿ëÇÏ¿© µ¥ÀÌÅͺí Àü¼ÛÇÒ ¶§ Àüü Àü¼Û¼º´É¿¡ ¿µÇâÀ» ÁÖ´Â Multipath¸¦ ¼öÇÐÀûÀ¸·Î ºÐ¼®ÇÏ¿´°í£¬ ºÐ¼®µÈ °á°úÇà ÀÌ¿ëÇÏ¿© ´ÙÁß°æ·ÎÀÇ ¿µÇâºí °í·ÁÇÑ ¼öÁß ÃÊÀ½ÆÄ ¿µ»óÅë½Å ½Ã½ºÅÛÀ» ¼³°èÇÏ¿´´Ù. ÁÖÆļö Á¦¾àȯ°æ¿¡ °­ÀÎÇÑ ¥ð/4 QPSK ¾Ë°í¸®µëÀ½ äÅÃÇÏ¿´°í, ¼öÁß ÃÊÀ½ÆÄ Åë½Å¿¡¼­ ¹ß»ýÇÏ´Â ½ÅÈ£ÀÇ Ringing È¿°ú¸¦ »ó¼âÇϱâ À§ÇÏ¿© FM º¯Á¶¹æ½ÄÀ» °¡¸¶ÇÑ Hybrid º¯º¹Á¶ ½Ã½ºÅÛÀ» ¼³°èÇÏ¿´´Ù. ¶ÇÇÑ£¬ ´ÙÁß°æ·Î ÀÇ ¿µÇâÀ» »ó¼âÇϱâ À§ÇÏ¿© Àû¿õ µîÈ­±â¸¦ ¼³°èÇÏ¿´À¸¸ç£¬ Baseline ]PEG ±â¹ýÀ» ÀÌ¿ëÇÏ¿© ¼öÁ¾¿µ»ó ¾ÐÃà¿¡ ´ëÇÑ ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù.
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(English Abstract)
This paper deals with an analysis of mu1tipath which affect a transmission performance in underwater acoustic channel. Underwater acoustic channel with multipath structure is introduced to mathematical modelling for a basin environment. In this paper, SMR(Signal to Multipath Ratio) which is defined as a parameter of multipath's effect is presented as a mathematical equation, and the equation of SMR is simulated by MATLAB program.
Furthermore, this paper is also dealt with an implementation of modulation and demodulation system for acoustic transmission. Acoustic Transmission is limited by frequency bandwidth, so ¥ð/4 QPSK(Quadrature Phase Shift Keying) methods which is ver¥ã useful at frequency limitation and FM(Frequency Modulation) are used at acoustic communication system. This implemented hybrid modulation/demodulation system is used as an analog board of image transmission system. In this system, adaptive equalization for reducing the multipath effect and baseline .JPEG used for an image compressing are also stated.
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