发明名称 |
A METHOD DISTINGUISHING LINE OF SIGHT (LOS) FROM NON-LINE OF SIGHT (NLOS) IN CDMA MOBILE COMMUNICATION SYSTEM |
摘要 |
<p>A method that identifies whether a channel is LOS or NLOS in a mobile communication system. After coherent accumulation and non-coherent accumulation have been made by the system, first the method takes power difference of a LOS path and a NLOS path in a same power delay profile to identify a channel; and then the result is further determined by tau / sigma difference of a LOS channel and a NLOS channel (where tau and sigma is a mean delay and a RMS delay spread of a multipath power profile, respectively). A channel is determined as a LOS channel, if the power ratio of the Maximum Path to the Local Maximum Path is greater than a threshold K, and simultaneously the arrival time difference between the First Path and said Maximum Path is less than a time interval T; otherwise it is a NLOS channel. The method is easier to implement and compatible with the present mobile communication system. <IMAGE></p> |
申请公布号 |
EP1469685(A1) |
申请公布日期 |
2004.10.20 |
申请号 |
EP20020706591 |
申请日期 |
2002.03.29 |
申请人 |
HUAWEI TECHNOLOGIES CO., LTD. |
发明人 |
DIAO, XINXI;GUO, FANGFU |
分类号 |
G01S5/02;H04B1/707;H04Q7/38;(IPC1-7):H04Q7/00;G01S5/00;H04J13/00 |
主分类号 |
G01S5/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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