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    • 24. 发明公开
    • 쇼트코드를사용하여CDMA시스템에서초기전력램프-업을제어하는방법
    • 通过使用短码来控制CDMA系统中的初始功率放大的方法
    • KR1020000022540A
    • 2000-04-25
    • KR1019980710988
    • 1997-06-23
    • 인터디지탈 테크날러지 코포레이션
    • 오즈루투럭패신엠.롬프그레이알.헤임존더블유.
    • H04B7/005H04B7/26
    • H04W52/60H04B1/707H04B1/7075H04B1/70753H04B1/70755H04B1/70758H04B1/7077H04B1/708H04B2201/70701H04B2201/70702H04B2201/70703H04B2201/70707H04B2201/7071H04W52/36H04W52/362H04W52/367H04W52/50
    • PURPOSE: A method of controlling initial power ramp-up is provided to control transmission power during the establishment between CDMA subscriber units and stationary in CDMA system by using short codes. CONSTITUTION: A system and method of controlling transmission power during the establishment of a channel in a CDMA communication system utilize the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The subscriber unit quickly increases transmission power while repeatedly transmitting the short code until the signal is detected by the base station. The short code is a sequence for detection by the base station which has a much shorter period than a conventional spreading code. The use of short codes limits power overshoot and interference to other subscriber stations and permits the base station to quickly synchronize to the spreading code used by the subscriber unit. The ramp-up starts from a power level that is guaranteed to be lower than the required power level for detection by the base station. Once the base station detects the short code, it sends an indication to the subscriber unit to cease increasing transmission power.
    • 目的:提供一种控制初始功率提升的方法,以便在CDMA用户单元之间的建立过程中控制发送功率,并通过使用短码在CDMA系统中固定。 构成:在CDMA通信系统建立信道期间控制发射功率的系统和方法利用在初始功率提升期间从用户单元向基站传输短码。 用户单元快速增加发射功率,同时重复发送短码直到基站检测到信号。 短码是用于基站检测的序列,其具有比常规扩展码短得多的周期。 使用短码限制了对其他用户站的功率过冲和干扰,并允许基站快速同步到用户单元使用的扩展码。 斜坡上升从功率电平开始,该功率电平保证低于基站检测所需的功率电平。 一旦基站检测到短码,它就向用户单元发送指示,以停止增加发射功率。