Acquisition algorithm of weak GPS/GLONASS signals

The design project of double receiver on GPS/GLONASS was given in the paper,GPS/GLONASS signals acquisition were researched in weak signal circumstance,GLONASS signals and GPS signals were acquired using parallel code phase search algorithm and circle correlation integration acquisition algorithm.Finally,performance of double receiver was simulated using real signals,the capacity of detection weak signal,and acquisition probability with different signals to noise and different data length were discussed.The results showed that double receiver could acquire satellite signals in low signals to noise circumstance with lesser data length,which improves receiver sensitivity.