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    • 8. 发明公开
    • A POWER CONTROL METHOD AND A RADIO SYSTEM
    • LEISTUNGSSTEUERUNGSVERFAHREN UND FUNKSYSTEM
    • EP1212908A1
    • 2002-06-12
    • EP00964848.6
    • 2000-09-15
    • Telefonaktiebolaget L M Ericsson (Publ)
    • ALMGREN, MagnusOLOFSSON, HakanSVANBRO, Krister
    • H04Q7/32
    • H04W52/228H04W52/362
    • The present invention relates to methods of controlling transmitting power in a cellular radio communication system comprising one or several base stations each communicating with mobile terminals located within its respective area of coverage in which method the desired power change is calculated by means of an adaptive algorithm. Power drift between the desired output power and actually used output power is reduced by making the algorithm reduce the influence of the previously used output power by multiplying it with a "forgetting function" lambda with values between 0 and 1. At the receiving end is a decision made whether the received power order commands are reliable or not by checking the soft value of the power order commands. This proposed power control algorithm provides a delta-modulated fast power control method which is robust to errors in the signalling channel and at the same time reacts quickly to fast fading variations.
    • 本发明涉及一种控制蜂窝无线电通信系统中的发射功率的方法,所述蜂窝无线电通信系统包括一个或多个基站,每个基站与位于其各自覆盖区域内的移动终端进行通信,在该方法中,通过自适应算法计算所需功率变化。 通过使算法通过将其与“0”和“1”之间的值的“忘记函数”λ相乘,从而降低了先前使用的输出功率的影响,从而降低了所需输出功率与实际使用的输出功率之间的功率漂移。在接收端是 通过检查电力订单命令的软值来决定接收到的电力订单命令是否可靠。 该提出的功率控制算法提供了一种增量调制快速功率控制方法,其对于信令信道中的错误是鲁棒的,并且同时对快速衰落变化做出快速反应。