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    • 2. 发明申请
    • PASSIVE INTER-MODULATION POSITION DETECTION METHOD AND DEVICE
    • 被动互调位置检测方法和设备
    • WO2011144103A2
    • 2011-11-24
    • PCT/CN2011074756
    • 2011-05-27
    • HUAWEI TECH CO LTDWANG CHUNYE SIQINGYANG JIANJUNXU JING
    • WANG CHUNYE SIQINGYANG JIANJUNXU JING
    • H04L27/2649H04B17/103H04B17/11H04B17/16
    • The present invention discloses a passive inter-modulation position detection method, which includes that: a dual-tone signal is inputted into a transmission channel of a base station (A1); a passive inter-modulation (PIM) multi-tone signal outputted from an analog-to-digital converter in a reception channel of the base station is obtained (A2); a PIM distribution of the base station is obtained according to the PIM multi-tone signal (A3); the steps A1, A2 and A3 are performed circularly for K times together, wherein, the interval between the dual-tone signals inputted at two neighbor times is an integer multiple of a preset time, the frequency of the dual-tone signal inputted at each time is increased progressively or decreased progressively according to a preset stepping frequency, K is an integer more than 1, and the stepping frequency is the reciprocal of the preset time, the dual-tone interval frequency of the dual-tone signal equals to the integer multiple of the stepping frequency; and a PIM interpretation is performed according to the PIM distribution obtained at K times, and a PIM position detection result is obtained (A4). By the present invention, the PIM distribution is obtained according to the PIM multi-tone signal in the reception channel of the base station, further the PIM interpretation is performed according to the PIM distribution, the PIM position detection result is obtained, and the PIM in the base station is eliminated according to the PIM position detection result.
    • 本发明公开了一种无源互调位置检测方法,包括:将双音信号输入到基站(A1)的传输信道中; 获得在基站的接收信道中从模数转换器输出的被动互调(PIM)多音调信号(A2); 根据PIM多音调信号(A3)获得基站的PIM分布; 步骤A1,A2和A3循环执行K次,其中,在两个相邻时间输入的双音信号之间的间隔是预设时间的整数倍,每个输入的双音信号的频率 时间根据预设的步进频率逐渐增加或逐渐减小,K是大于1的整数,步进频率是预设时间的倒数,双音信号的双音间隔频率等于整数 多个步进频率; 并根据在K次获得的PIM分布进行PIM解释,得到PIM位置检测结果(A4)。 通过本发明,根据基站的接收信道中的PIM多音调信号获得PIM分布,进一步根据PIM分布进行PIM解释,获得PIM位置检测结果,PIM 在基站中根据PIM位置检测结果消除。