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- W1993572629 abstract "DS-CDMA 방식은 하나의 무선 채널을 다수의 이동국들이 시간과 주파수를 공유하여 사용하게 되는데, 이때 이동국 간의 간섭 최소화를 목적으로 PN 부호(Pseudo-noise Code)를 사용한다. 하지만 PN 부호는 상관 특성으로 시간지연이 0일 때 상관 값이 1이 되지만, 시간지연이 0이 아닐 때는 상관 값이 1/N이 되어 완전한 상관 특성을 이루지 못하게 된다. 이로 인해 사용자가 증가될 경우 사용자 간의 간섭에 의해 성능 저하 및 시스템 용량 제한 문제가 여전히 발생할 수 있다. 따라서 본 논문에서는 PN 부호가 이상적인 자기 상관관계를 가지게 하고, 오프셋(offset)을 가진 PN 부호를 사용함으로써 사용자들 간의 다원접속간섭(Multiple Access Interferemce)을 제거함을 증명하였다. In DS-CDMA method, Mobile Stations own jointly one radio channel and are made to use a PN code (Pseudo-Noise Code) for the purpose of minimize interference. However, corelation value of PN code is one when time delay is zero but the corelation value is 1 / N when time delay is not 0. Therefore corelation characteristic does not fully attained. As a result, when the user increase, the performance degradation and system capacity problem will be able to occur by interference among users. In this paper, the PN code has ideally self corelation. It was proved that PN code could depress interference from other users in multiple access system." @default.
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- W1993572629 date "2010-08-31" @default.
- W1993572629 modified "2023-10-14" @default.
- W1993572629 title "PN Code Algorithm for Improving Interference Cancellation of Multiple Access" @default.
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- W1993572629 doi "https://doi.org/10.5762/kais.2010.11.8.3053" @default.
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