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자료유형
학술저널
저자정보
저널정보
한국전자파학회JEES Journal of Electromagnetic Engineering And Science Journal of The Korea Electromagnetic Engineering Society Vol.6 No.2
발행연도
2006.6
수록면
103 - 109 (7page)

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This paper suggests an efficient and comprehensive algorithm of the protection ratio derivation and illustrates some calculated results applicable to the initial planning of frequency coordination in the fixed wireless access networks. The net filter discrimination associated with Tx spectrum mask and overall Rx filter characteristic has been also examined to show the effect of the adjacent channel interference. The calculations for co-channel and adjacent channel protection ratios are performed for the current microwave frequency band of 6.7 ㎓ including Tx spectrum mask and Rx filter response. According to results, fade margin and co-channel protection ratio reveal 41.4 and 75.2 ㏈, respectively, for 64-QAM and 60 km at BER 10??. It is shown that the net filter discrimination with 40 ㎒ channel bandwidth provides 28.9 ㏈ at the first adjacent channel, which yields 46.3 ㏈ of adjacent channel protection ratio. In addition, the protection ratio of 38 ㎓ radio relay system is also reviewed for millimeter wave band applications. The proposed method gives some advantages of an easy and systematic extension for protection ratio calculation and is also applied to frequency coordination in fixed millimeter wave networks.

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Abstract
Ⅰ. Introduction
Ⅱ. Dispersive and Flat Fade Margins
Ⅲ. Protection Ratio and Net Filter Discrimination
Ⅳ. Simulated Results and Discussion
Ⅴ. Conclusions
References
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