| 摘要 |
Present invention relates to A method distinguishing a line of sight (LOS) from a non-line of sight (NLOS) in CDMA mobile communication system. In this invention, on the basis of coherent cumulating and non-coherent cumulating completed by system, according to a difference between power levels of direct path and non-direct on power delay distributing, and by using difference between tau / sigma of the LOS power delay distributing and tau / sigma of the LOS power delay distributing ( tau and sigma is average delay and root mean square delay spread of multi-path power distributing,respectively), it is made for distinguishing the LOS from NLOS. By using inter-path power difference on same power delay distributing, the decision be made, comprising: whether ratio of max-path and local max-path is greater than threshold K (when no local max-path exist, it be replaced with thetatimes average noise power); whether difference between time of first path arrival and time of max-path arrival is less than given value, if the both decision results are yes, the LOS be decided, contrarily, the NLOS be decided. This method can simply be achieved, and facilely incorporate with current system.
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