A method for ambiguity solving based on rotary interferometer

Based on rotary interferometer, an approach for phase difference measurement and ambiguity solving is presented. First analyzes the changes of phase difference when using a rotating interferometer to find direction, then aiming at the problem for Ka-band radar signals, difficult to deal with existing algorithms, that the phase difference becomes greater when using a rotating interferometer to find direction, twice modified ambiguity solving algorithm is established. Adopting this method, the hardware structure is easy to be achieved in the passive seeker. According to the result of simulation, probability of ambiguity solving is better than 90% when SNR is above -8dB.