CAJ | 학술논문

CDMA移动通信系统中，受到建筑物和地形地貌的影响，通信环境十分复杂，通信系统的通信质量受到严重影响。CDMA系统采用RAKE接收技术，它可以在时间上分辨出细微的多径信号，这样便把多径信号加以利用，克服了多径衰落带来的影响，达到增强接收效果的目的。在对RAKE接收机基础理论进行分析的基础上，采用Matlab仿真软件对不同用户状态下的RAKE接收机性能进行仿真，并对最大比合并、等增益合并、选择式合并这三种合并方式进行比较，给出仿真结果及误码率性能参数。然后，针对CDMA系统中RAKE接收机的性能进行建模仿真，仿真结果表明，CDMA系统中采用RAKE 接收机起到了抗多径干扰、提高系统性能的目的。
CDMA이동통신계통중，수도건축물화지형지모적영향，통신배경십분복잡，통신계통적통신질량수도엄중영향。CDMA계통채용RAKE접수기술，타가이재시간상분변출세미적다경신호，저양편파다경신호가이이용，극복료다경쇠락대래적영향，체도증강접수효과적목적。재대RAKE접수궤기출이론진행분석적기출상，채용Matlab방진연건대불동용호상태하적RAKE접수궤성능진행방진，병대최대비합병、등증익합병、선택식합병저삼충합병방식진행비교，급출방진결과급오마솔성능삼수。연후，침대CDMA계통중RAKE접수궤적성능진행건모방진，방진결과표명，CDMA계통중채용RAKE 접수궤기도료항다경간우、제고계통성능적목적。
Since the CDMA mobile communication system is affected by the building and landform,its communication envi?ronment is very complex,and its communication quality are badly affected. CDMA system using RAKE receiving technology can distinguish the subtle multipath signal in time,and can take advantage of the multipath signal to overcome the effects of multipath fading and enhance the reception capacity. Based on the basic theory analysis of RAKE receiver,Matlab simulation software is adopted to perform performance simulation of RAKE receiver under different user states. Three combining modes of maximum ratio, gain,selection are compared. The simulation results and bit error rate performance parameters are given. The performance of the RAKE receiver in the CDMA system is modeled and simulated. The simulation results show that RAKE receiver used in CDMA system can play a role of anti?multipath interference,and can improve system performance.