Automatic gain adjustment and control method and device for eliminating interference between GSM and LTE in MSR receiver

An automatic gain adjustment and control device for eliminating the interference between Global System for Mobile Communication (GSM) and Long-Term Evolution (LTE) in Multi-Standard Radio (MSR) receiver, comprising the following components configured in the MSR receiver:

• a threshold setting component, configured to set an upper threshold and a lower threshold which are used for starting up gain control function;
• an Analogue-to-Digital Converter (ADC) power detector, configured to detect the ADC power of the ADC of the MSR receiver when LTE Orthogonal Frequency Division Multiplexing (OFDM) starts, wherein an LTE OFDM starting time is determined by using a synchronous frame header (CP) of a received LTE OFDM symbol;
• a comparing component, configured to compare the detected ADC power with the upper threshold and the lower threshold respectively;
• and
• a gain control start-up component, configured to start up the gain control function of the MSR receiver according to a comparison result of the comparing component, wherein when the comparison result is that the ADC power is larger than the upper threshold or the ADC power is smaller than the lower threshold, the gain control function of the MSR receiver is started up.