Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)
Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
Microwave ä³Î ȯ°æ¿¡¼ ´ÜÀÏÀûÀÀµîȱ⸦ ÀÌ¿ëÇÏ´Â OFDM/QPSK-DMR ½Ã½ºÅÛÀÇ ¼º´É ºÐ¼® |
¿µ¹®Á¦¸ñ(English Title) |
Performance Analysis of OFDM/QPSK-DMR System Using One-tap Adaptive Equalizer over Microwave Channel Environments |
ÀúÀÚ(Author) |
¾ÈÁعè
¾çÈñÁø
Á¶¼º¾ð
¿ÀâÇå
Á¶¼ºÁØ
Jun-Bae Ahn
Hee-Jin Yang
Sung-Eon Cho
Chang-Heon Oh
Sung-Joon Cho
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¿ø¹®¼ö·Ïó(Citation) |
VOL 08 NO. 03 PP. 0517 ~ 0522 (2004. 06) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â ¸¶ÀÌÅ©·Î¿þÀ̺ê ä³Î ȯ°æ¿¡¼ ´ë¿ªÁ¦ÇÑÇÊÅÍ(BL-PSF)¸¦ ÀÌ¿ëÇÏ´Â OFDM/QPSK-DMR ½Ã½ºÅÛÀÇ ¼º´É°³¼±¿¡ °üÇÑ ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. ¼º´É°³¼±À» À§ÇØ ´ÜÀÏÀûÀÀµîȱâ(one-tap adaptive equalizer)¸¦ OFDM/QPSK-DMR ½Ã½ºÅÛ¿¡ Àû¿ëÇÏ¿´À¸¸ç, ´ÜÀÏ ¹Ý¼ÛÆĹæ½ÄÀÇ DMR ½Ã½ºÅÛ°ú BER ¹× Ư¼º °î¼±(signature curve) ¼º´ÉÀ» ºñ±³ºÐ¼®ÇÏ¿´´Ù. ½Ã¹Ä·¹ÀÌ¼Ç °á°ú ¸¶ÀÌÅ©·Î¿þÀ̺ê ä³Î ȯ°æ¿¡¼ OFDM/QPSK-DMR ½Ã½ºÅÛ¿¡ ´ÜÀÏÀûÀÀµîȱ⸦ Àû¿ëÇÑ °æ¿ì, ºÎ ¹Ý¼ÛÆÄÀÇ ¼ö°¡ 16À϶§ ´ÜÀÏ ¹Ý¼ÛÆĹæ½ÄÀÇ DMR ½Ã½ºÅÛº¸´Ù 2 dB ÀÌ»óÀÇ ÆäÀÌµå ¸¶ÁøÀ» °®´Â´Ù. ±×¸®°í OFDM/QPSK-DMR ½Ã½ºÅÛÀÇ ºÎ ¹Ý¼ÛÆÄÀÇ ¼ö°¡ ¸¹À»¼ö·Ï ÆäÀÌµå ¸¶ÁøÀÌ ´õ¿í Áõ°¡ÇÏ¿© ¼º´ÉÀÌ Çâ»ó µÇ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In this paper, we have analyzed the performance enhancement of Orthogonal Frequency Division Multiplexing/Quadrature Phase Shift Keying Modulation-Digital Microwave Radio(OFDM/QPSK-DMR) system using Band Limited-Pulse Shaping Filter(BL-PSF) over microwave channel environments. For performance enhancement, the one-tap adaptive equalizer is adopted in the OFDM/QPSK-DMR system and than both BER and signature curve performance are compared with those of single carrier DMR system. Computer simulations confirm that the OFDM/QPSK-DMR system using 16 sub-carrier increase the fade margin about 2 dB over microwave channel environments and that of performance using one-tap adaptive equalizer is highly increased the fade margin as the number of sub-carriers is larger.
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Å°¿öµå(Keyword) |
DMR system
OFDM
One-tap adaptive equalizer
Microwave channel
Band-limited pulse shaping filter
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ÆÄÀÏ÷ºÎ |
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