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    • 4. 发明申请
    • METHOD FOR INTERFERENCE SOURCE IDENTIFICATION
    • 干扰源识别方法
    • WO2003063532A1
    • 2003-07-31
    • PCT/SE2002/000139
    • 2002-01-25
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)LARSSON, KjellSVENSSON, BjörnGUSTAFSSON, Jörgen
    • LARSSON, KjellSVENSSON, BjörnGUSTAFSSON, Jörgen
    • H04Q7/34
    • H04W24/00
    • The present invention relates to a method to identify one or more interference sources in a mobile radio system, preferably in a GSM radio network for mobile telephones. A received signal (r) consists of a wanted signal and a number of interference signals of which one is a dominating interference signal and where all signals includes a known training sequence (TK1,TK2,... ). The carrier is estimated and subtracted from the received signal (r) giving a remaining interference signal (s).This signal is correlated against known training sequences (TKj, j=0,1,2,...,7) resulting in a training sequence associated with the interfering signal.According to the invention, the identification code (BCC) of a possible interference source (BS1) from said training sequence is determined. After that, a number of candidates (CA1,CA2, ), each corresponding with a certain cell from the identification code (BCC) are determined and also the frequency which is disturbed and the timing offset (t1,t2,... Fig 7) for the frequencies used by said candidates. Finally it is investigated if one or more (fa,fb ) of these have the same time offset as the interference signal (t0) resulting in that at least one candidate (CA3) with the best matching offsets on its frequencies is identified as the interference source.
    • 本发明涉及一种在移动无线电系统中,优选地在用于移动电话的GSM无线电网络中识别一个或多个干扰源的方法。 接收信号(r)由有用信号和多个干扰信号组成,其中一个是主导干扰信号,其中所有信号包括已知的训练序列(TK1,TK2,...)。 估计载波并从接收到的信号(r)中减去给出剩余干扰信号(s)。该信号与已知的训练序列(TKj,j = 0,1,2,...,7)相关,导致 训练序列与干扰信号相关联。根据本发明,确定来自所述训练序列的可能的干扰源(BS1)的识别码(BCC)。 之后,确定从识别码(BCC)分别对应于特定小区的多个候选(CA1,CA2,...),并且确定被干扰的频率和定时偏移(t1,t2,...) )用于所述候选者使用的频率。 最后,调查其中一个或多个(fa,fb)是否与干扰信号(t0)具有相同的时间偏移,导致在其频率上具有最佳匹配偏移的至少一个候选(CA3)被识别为干扰 资源。