[전파 전자] Propagation model in CDMA

등록일 2002.04.25 한글 (hwp) | 10페이지 | 가격 500원

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꾸준히 함 올리볼랍니다.

목차

On the model of wireless channel

1. Instruction
2. channel model
2-1 Lee model
2-2 Ray tracing model
2-3 Hata model
3. Trend and Issuse
4. Reference

본문내용

1. Instruction

we studied propagation model.There are many propagation model.
These model are used to predict the received signal as different method.
we need to study these model minutely.
technology transform rapidly. so, we deal with these circumstances
now, I introduce some of propagation model.

2. Channel model

2-1 Lee model
Lee model is one of the most widely used propagation models due to its ability to achieve good prediction.
another very important feature of the Lee model is that its predidtion ability can be significantly improved by the incorporation of measurement data.
so,Lee model has been used successfully throughtout the mobile systems.
The Lee model is a terrain based,statistical propagation tool that predicts
RF signal long-nomal signal fading charateristics over distance.
The pridicted signal strength value for an area is the average signal strength representative of the region.

참고 자료

[1] W.C.Y. Lee "Lee's model" a condensed version shown in Appendix ∥
Februry 1988.pp 68-70
[2] W.C.Y Lee and David J.Y.Lee,"hand off effects on Cellular CDMA
System", 2nd international conference on Rersonal,mobile and spread
spectrum communication
[3] W.C.Y Lee and David J.Y.Lee," Microcell prediction in dende urban
area, "IEEE,VTC, Feb,97
[4] W.C.Y Lee and David J.Y.Lee," Microcell prediction in dende urban
area,"Accepted by Vehicular Technology, 1996
[5] M.F.Catedra et al."Efficient Ray-tracing techniques for Three Dimention
analysis of propagation in mobile communication application to picocell
and microcell Cenarios,"IEEE antennas propagation . Mag , vol40, no2
pp.15-28, Apr.1998
[6] G.Liang,H.L.Bertoni,"A new approach to 3-D ray-tracing for propagation
prediction in cities."IEEE Trans. Antenna propagat, vol 46,no.6,
pp.853-863, Jun.1998
[7] S.Y.Seidel and T.S.Rappaport."Site-Spectific propagation prediction for
Wireless In-Building personal communication system Design." IEEE Trans
veh.Technol,vol43,no.4,pp879-891,Nov.1994
[8] K.Rizk,J.F.Wagen and F. Gardiol,"two-Dimensional ray-tracing model for
propagation prediction in microcellular environments,"IEEE Trans
veh.Technol vol 46,no 2,pp.508-518,May.1994

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