| 摘要 |
A base transceiver 3 used for radio communication with one or more distant transceiver units 5 (mobile stations) is operable to apply a downlink interference detection mode wherein (i) the base transceiver periodically generates and sends a test signal to the one or more distant transceiver units; (ii) the base transceiver senses whether or not a response signal is sent, possibly within a predetermined time interval, by a distant transceiver in response to receipt of the test signal; and (iii) if no response signal is detected the base transceiver generates an interference detection signal. The base transceiver may further issue an auxiliary control signal to a receiver to initiate identification of the interference level on the downlink channel and possibly distinguish between the following interference conditions: (i) the downlink transmitter has a fault causing noise, (ii) the downlink transmission is subject to interference or (iii) no distant transceiver has received the transmitted test signal. Furthermore the base transceiver may send an interference detection signal to a system controller 7 which may in response change one of its operating parameters to avoid the interference. A method of operation of the base transceiver and a transceiver for use as the distant transceiver are also described. |
