Method and system for calibration in an fm transceiver system with off-chip control

Abstract

Aspects of a method and system for calibration in an FM transceiver system with off-chip control may include, in an integrated FM system comprising an FM radio transmitter, an FM radio receiver and a common local oscillator, receiving one or more control signals that control calibration of the integrated FM system. Responsive to the one or more control signals, one or more RF carrier signals and corresponding phase-shifted versions of the generated one or more RF carrier signals may be generated via the common local oscillator. The FM radio transmitter and/or the FM radio receiver may be calibrated based on an RF calibration signal generated from the one or more RF carrier signal and/or the corresponding phase-shifted versions of the generated one or more RF carrier signals. An in-phase baseband signal component associated with the generated RF calibration signal may be zeroed.

1 . A method for processing communication signals, the method comprising:
 in an integrated FM system comprising an FM radio transmitter, an FM radio receiver and a common local oscillator, receiving one or more control signals that control calibration of said integrated FM system;   responsive to said one or more control signals, generating via said common local oscillator, one or more RF carrier signals and corresponding phase-shifted versions of said generated one or more RF carrier signals; and   calibrating said FM radio transmitter and/or said FM radio receiver based on an RF calibration signal generated from said one or more RF carrier signals and/or said corresponding phase-shifted versions of said generated one or more RF carrier signals.   
   
   
       2 . The method according to  claim 1 , comprising adjusting a phase between said one or more RF carrier signals and said corresponding phase-shifted versions of said generated one or more RF carrier signals, based on said generated RF calibration signal. 
   
   
       3 . The method according to  claim 2 , comprising zeroing an in-phase baseband signal component associated with said generated RF calibration signal. 
   
   
       4 . The method according to  claim 3 , comprising measuring a signal power of an in-phase signal component after demodulating said generated RF calibration signal. 
   
   
       5 . The method according to  claim 2 , comprising zeroing a quadrature baseband signal component associated with said generated RF calibration signal. 
   
   
       6 . The method according to  claim 5 , comprising measuring a signal power of an in-phase signal component after demodulating said generated RF calibration signal. 
   
   
       7 . The method according to  claim 1 , comprising adjusting a tuning range of said FM radio receiver based on said generated RF calibration signal 
   
   
       8 . The method according to  claim 1 , comprising calibrating a tuning range of said FM radio transmitter based on said generated RF calibration signal. 
   
   
       9 . The method according to  claim 1 , comprising adjusting one or more gain stages in said FM radio receiver based on said generated RF calibration signal. 
   
   
       10 . The method according to  claim 1 , comprising calibrating one or more gain stages in said FM radio transmitter based on said generated RF calibration signal. 
   
   
       11 . The method according to  claim 1 , comprising calibrating one or more gain stages in said FM radio receiver based on said generated RF calibration signal. 
   
   
       12 . The method according to  claim 1 , comprising adjusting one or more parameters of a power amplifier based on said generated RF calibration signal. 
   
   
       13 . The method according to  claim 1 , wherein said one or more control signals is generated by an external test system. 
   
   
       14 . A system for processing communication signals, the system comprising:
 one or more circuits in an integrated FM system comprising an FM radio transmitter, an FM radio receiver and a common local oscillator, said one or more circuits enable:   receiving of one or more control signals that control calibration of said integrated FM system;   generation via said common local oscillator, one or more RF carrier signals and corresponding phase-shifted versions of said generated one or more RF carrier signals, in responsive to said one or more control signals; and   calibration of said FM radio transmitter and/or said FM radio receiver based on an RF calibration signal generated from said one or more RF carrier signals and/or said corresponding phase-shifted versions of said generated one or more RF carrier signals.   
   
   
       15 . The system according to  claim 14 , wherein said one or more circuits adjust a phase between said one or more RF carrier signals and said corresponding phase-shifted versions of said generated one or more RF carrier signals, based on said generated RF calibration signal. 
   
   
       16 . The system according to  claim 15 , wherein said one or more circuits zero an in-phase baseband signal component associated with said generated RF calibration signal. 
   
   
       17 . The system according to  claim 16 , wherein said one or more circuits measure a signal power of an in-phase signal component after demodulating said generated RF calibration signal. 
   
   
       18 . The system according to  claim 15 , wherein said one or more circuits zero a quadrature baseband signal component associated with said generated RF calibration signal. 
   
   
       19 . The system according to  claim 18 , wherein said one or more circuits measure a signal power of an in-phase signal component after demodulating said generated RF calibration signal. 
   
   
       20 . The system according to  claim 14 , wherein said one or more circuits adjust a tuning range of said FM radio receiver based on said generated RF calibration signal 
   
   
       21 . The system according to  claim 14 , wherein said one or more circuits calibrate a tuning range of said FM radio receiver based on said generated RF calibration signal. 
   
   
       22 . The system according to  claim 14 , wherein said one or more circuits adjust one or more gain stages in said FM radio receiver based on said generated RF calibration signal. 
   
   
       23 . The system according to  claim 14 , wherein said one or more circuits calibrate one or more gain stages in said FM transmitter based on said generated RF calibration signal. 
   
   
       24 . The method according to  claim 14 , wherein said one or more circuits calibrate one or more gain stages in said FM radio receiver based on said generated RF calibration signal. 
   
   
       25 . The system according to  claim 14 , wherein said one or more circuits adjust one or more parameters of a power amplifier based on said generated RF calibration signal. 
   
   
       26 . The system according to  claim 14 , wherein said one or more control signals is generated by an external test system.