A Frequency Synchronization Method for Star-Star Bistatic SAR Imaging with COMPASS Signal
In view of the frequency synchronization error to the star-star bistatic SAR imaging with signal of COMPASS Navigation Satel ite System (CNSS), a novel frequency synchronization method for strong noise environment was presented. A synchronizing channel was constructed with the direct wave of CNSS as the signal source for synchronization. The high accuracy pseudo-random code delay can be got by capture algorithm of the time-frequency optimization in single period . then, base on the synchronization of pseudo-random code , the frequency synchronization error can be got by capture algorithm of the time-frequency with Multi period accumulation. The frequency synchronization errors are less than 1.5Hz in 10 computer simulations with strong noise as SNR=-50db.
signal of CNSSfrequency synchronizationstrong noiseMulti period accumulation
NETL
NSTL
万方数据
维普
