| 摘要 |
The hand-off asuchparatus for a call-in-progres is arranged that both a ratio of a length of time, in which a measured value of SNP (at 9, 10, 11) is below a predetermined threshold to a total lengtratio of a of the measuring time, and a second length of time in which a measured value of RSSI (at 14) is below a predetermined threshold to a total length of the measuring time are detected. The first ratio functions mainly when the threshold of RSSI is predetermined to a relatively low value. The second ratio functions mainly when the threshold of RSSI is predetermined to a relatively high value. The received signal is converted into an IR signal, and the SNR and RSSI are calculated. High frequency signals received by the antenna (1) are amplified and mixed with signals from the oscillator (4) to produce IF signals.
|
