计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
16期
25-30
,共6页
唐志军%吴笑峰%詹杰%胡仕刚%席在芳
唐誌軍%吳笑峰%詹傑%鬍仕剛%席在芳
당지군%오소봉%첨걸%호사강%석재방
射频识别%传播模型%多径环境%路径损耗%识别距离
射頻識彆%傳播模型%多徑環境%路徑損耗%識彆距離
사빈식별%전파모형%다경배경%로경손모%식별거리
radio frequency identification%propagation model%multipath environment%path loss%identification distance
针对自由空间模型在预测射频识别系统识别距离时存在的偏差，综合考虑射频识别系统应用的多径传播环境，建立一种无源超高频射频识别系统电波传播模型，并重点分析了前向链路路径损耗的主要影响因素及其计算方法。基于该电波传播模型，探索性地提出实际环境下的无源超高频射频识别应用模拟思路。仿真和测量结果表明，该模型在预测无源超高频射频识别系统识别距离时更为准确。
針對自由空間模型在預測射頻識彆繫統識彆距離時存在的偏差，綜閤攷慮射頻識彆繫統應用的多徑傳播環境，建立一種無源超高頻射頻識彆繫統電波傳播模型，併重點分析瞭前嚮鏈路路徑損耗的主要影響因素及其計算方法。基于該電波傳播模型，探索性地提齣實際環境下的無源超高頻射頻識彆應用模擬思路。倣真和測量結果錶明，該模型在預測無源超高頻射頻識彆繫統識彆距離時更為準確。
침대자유공간모형재예측사빈식별계통식별거리시존재적편차，종합고필사빈식별계통응용적다경전파배경，건립일충무원초고빈사빈식별계통전파전파모형，병중점분석료전향련로로경손모적주요영향인소급기계산방법。기우해전파전파모형，탐색성지제출실제배경하적무원초고빈사빈식별응용모의사로。방진화측량결과표명，해모형재예측무원초고빈사빈식별계통식별거리시경위준학。
There is a deviation in predicting identification distance of the radio frequency identification system for free-space model, a radio propagation model for passive UHF RFID systems is proposed by taking into full consideration to the application of RFID system in multipath propagation environment. Main affecting factors and its calculation methods of path loss are analyzed emphatically for the forward link of passive UHF RFID systems. Furthermore, a simulated method of passive UHF RFID applications in the actual environment is presented based on the proposed propagation model. The simulated and measured results show that the identification distance of passive UHF RFID is predicted more accurately by using the proposed model.
