Abstract
기존의 이동 통신시스템에서 사용하는 변조방식의 단점을 개선하기 위하여, 본 논문에서는 채널의 환경이 변함에 따라 적응적으로 변조방식을 변화시킴으로써 채널의 처리율을 향상시킬 수 있는 적응변조방식을 사용한 채널 예측 방법을 제안한다. 제안된 방식은 요구되는 채널의 비트 에러율에 따라 부호율을 결정하기 위해 채널 특성을 실시간으로 측정하여 채널의 비트 에러율이 증가하면 부호율을 감소시켜 최대 처리율을 유지하도록 하는 방법을 사용하며, Matlab을 이용한 시뮬레이션을 통하여 제안된 방식의 성능을 분석하였다. To improve drawback of existing modulation method, in this paper, we propose the channel forecast method using adaptive modulation which can improve throughput of channel. This method adaptively changes modulation method to the change of channel environments. In proposed method, channel's characteristics are measured in realtime to determine code rate to the changes of demanded channel's bit error rate. If bit error rate is increased, this method reduce code rate to maintain maximum throughput. We analysis performance of proposed method by Matlab.
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