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구분 출원국
출원년도 ~ 키워드

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등록 빔형성을 이용한 랜덤액세스 송신 다이버시티 방법

빔형성을 이용한 랜덤액세스 송신 다이버시티 방법
이미지 확대
발명자
이효석, 김일규, 고영조, 장갑석, 김영훈, 방승찬, 박형근
출원번호
12297745 (2007.04.19)
공개번호
20090175161 (2009.07.09)
등록번호
8165097 (2012.04.24)
출원국
미국
초록
A transmission method performed by a mobile station for random access channel (RACH) burst transmission diversity gain is provided. According to the method, by combining and using switching diversity by beam forming, frequency hopping, and power ramping, the probability that when the speed of a mobile station is low, the mobile station falls into a deep fading environment is lowered, thereby increasing the probability of detecting an RACH signature of the base station. Also, by using the transmission parameters (subbands, precoding matrixes, power, etc.) which are used for successful transmission of an RACH burst, for transmission of a successive user packet data, reliable transmission of the successive user packet data can be performed.
KSP 제안 키워드
Burst transmission, Deep fading, Diversity gain, Mobile station(MS), Random Access, Random access channel(RACH), base station(BS), beam-forming, channel diversity, fading environments, frequency hopping, packet data, reliable transmission, transmission method, transmission parameters
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