| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio monitoring device capable of deciding the cause of a packet error in a communication trouble.SOLUTION: A radio monitoring device receives a radio wave transmitted from a radio node, to decide whether an error occurs in a signal. Also, the radio monitoring device decides whether average signal power in a packet is greater than reception sensitivity, and further, detects EVM of a transmission signal from the radio node symbol-by-symbol, to calculate the expansion of EVM distribution in the packet. When an error occurs in the packet and the average power is greater than the reception sensitivity, the radio monitoring device decides fading or interference is the cause of the packet error according to the expansion of the EVM distribution. |
