Detection apparatus and detection method for received signal strength indicator

An apparatus for detecting a received signal strength indicator (RSSI), the apparatus comprising:

• an amplification unit configured to receive a modulated signal data stream from a microwave transmit end, perform an amplification on the modulated signal data stream according to an amplification control signal, and send the amplified modulated signal data stream to an analog-to-digital conversion unit, wherein the amplification control signal indicates a number of amplification times for the amplification performed by the amplification unit on the modulated signal data stream;
• the analog-to-digital conversion unit configured to perform an analog-to-digital conversion on the amplified modulated signal data stream to obtain a first digital signal data stream and send the first digital signal data stream to a filtering unit, to a first power detection unit and to a bandwidth information extraction unit;
• the filtering unit configured to filter the first digital signal data stream and send a filtered first digital signal data stream to a second power detection unit;
• the bandwidth information extraction unit configured to acquire, from the first digital signal data stream, information that a bandwidth of the first digital signal data stream is going to change after a time T and notify a delay alignment unit;
• the delay alignment unit configured to calculate a switching time t, and at a moment when the switching time t expires, notify the filtering unit to perform switching on a bandwidth of a filtering channel;
• the first power detection unit configured to perform a power detection on the first digital signal data stream to obtain a first average power value and send the first average power value to an amplification control unit;
• the second power detection unit configured to perform a power detection on the filtered first digital signal data stream to obtain a second average power value and send the second average power value to a RSSI calculation unit;
• the amplification control unit configured to obtain the amplification control signal according to the first average power value and send the amplification control signal to the RSSI calculation unit and the amplification unit;
• and
• an RSSI calculation unit configured to obtain an RSSI value by a calculation according to the amplification control signal and the second average power value.