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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 :

ÇѱÛÁ¦¸ñ(Korean Title) Àü·ÂÁõÆø±â ºñ¼±Çü º¸»ó ±â¼úÀ» °í·ÁÇÑ PSA-QAMÀÇ ¼º´ÉºÐ¼®
¿µ¹®Á¦¸ñ(English Title) Performance Analysis of Pilot Symbol Assisted QAM (PSA-QAM) with Power Amplifiers Nonlinear Compensation Technique
ÀúÀÚ(Author) À̺´·Î   ÀÓ¿µÈ¸   ÀÓµ¿¹Î   À̱¤¼®   ±èÇö´ö   Byeong-Ro Lee   Young-Hoe Lim   Dong-Min Lim   Kwang-Seok Lee   Hyun-Duk Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 02 NO. 02 PP. 0249 ~ 0258 (1998. 06)
Çѱ۳»¿ë
(Korean Abstract)
À̵¿Åë½Å¿¡¼­, ½ÅÈ£ÀÇ ÆäÀ̵ùÀ» º¸»óÇϱâ À§ÇÏ¿© pilot symbol assisted modulation (PSAM)¿¡ ´ëÇÑ ¸¹Àº ¿¬±¸°¡ ÁøÇà µÇ¾î¿Ô´Ù. º» ³í¹®¿¡¼­´Â ÃÖ´ëºñÇÕ¼º ´ÙÀ̹ö½ÃƼ¸¦ »ç¿ëÇÏ´Â PSA-QAM¿¡¼­ Àü·ÂÁõÆø±â ºñ¼±Çü¼º ÀÇ È¿°ú¸¦ ºÐ¼®ÇÏ¿´´Ù. ¸ÕÀú, PSAM¼º´ÉÀÇ ÇѰ踦 ±¸Çϱâ À§ÇÏ¿©, ÆäÀ̵ù¿¡ ´ëÇÑ ¿Ïº®ÇÑ Á¤º¸°¡ ÁÖ¾îÁø »óÅ¿¡¼­ ÃÖ´ëºñÇÕ¼º ´ÙÀ̹ö½ÃƼ¸¦ °®´Â QAMÀÇ ÀÌ·ÐÀû ¼º´ÉÀ» ºÐ¼®ÇÏ¿´´Ù. ½ÇÁ¦ PSAM¿¡¼­, ÆäÀ̵ù¿¡ ´ëÇÑ Á¤º¸´Â ÆÄÀÏ·µ ½Éº¼ÀÇ º¸°£¿¡ ÀÇÇÏ¿© ¾ò¾îÁø´Ù. ¿ÀÂ÷ÀÇ Æò±ÕÀü·ÂÀ» ÃÖ¼ÒÈ­ÇÏ´Â º¸°£ÇÊÅ͸¦ »ç¿ëÇÏ¿© ÇÊÅÍÀÇ ÅǼö, ÆÄÀÏ·µ ½Éº¼ ÇÁ·¹ÀÓ ÁÖ±â, µµÇ÷¯ ÁÖÆļö°¡ ¼º´É¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ºÐ¼®ÇÏ¿´´Ù. ºñ¼±Çü Àü·ÂÁõÆø±â AB, B, C±Þ ÀÇ AM/AM, AM/PM Ư¼ºÀ» ¼º´ÉºÐ¼® ¿¡ °í·ÁÇÏ¿´´Ù. ºñ¼±Çü º¸»ó±â¼úÀÎ Cartesian Feedback Loop (CFB) ÀÌ¿ëÇÏ¿© AWGN ä³Î°ú Rayleigh ÆäÀ̵ù ä³Î¿¡¼­ ºñ¼±Çü Àü·ÂÁõÆø±â Á¾·ù¿¡ µû¸¥ ¼º´Éº¯È­¸¦ ³ªÅ¸³»¾ú´Ù.
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(English Abstract)
In land mobile communication, very extensive studies on pilot symbol assisted modulation (PSAM) have been made on fading compensation. This paper analyzes the effect of power amplifier nonlinearity on PSA-QAM with maximal ratio combining space diversity. In practical PSAM, information on fading is obtained through interpolation of the pilot symbols. We employed the interpolation filter which could minimize the average power of error and analyzed effects on the system performance of the number of filter taps, period of the pilot symbol frame, and the Doppler frequency. Nonlinear power amplifiers of class AB, B, and C were incorporated in the system models and their AM/AM and AM/PM characteristics were taken into account in the performance analysis. We showed the performance variations according to the types of the nonlinear power amplifiers in the AWGN and Rayleigh fading channels using nonlinear compensation technique, Cartesian Feedback Loop (CFB).
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