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A parallel navigation satellite signal tracking method and system based on GPU

ActiveCN103278829BPowerful floating-point parallel computing capabilityTake full advantage of hardware performanceSatellite radio beaconingDiscriminatorCarrier signal
The invention discloses a parallel navigation satellite signal tracking method based on GPU (graphics processing unit) and a system thereof. The method comprises the following steps: constructing a multichannel carrier tracking loop and a pseudo code tracking loop on CPU(central processing unit)-GPU, wherein the CPU is in charge of data reading, loop phase discrimination and control functions and the like, and the GPU is in charge of the relevant calculation and integral summation functions of a great quantity of data sequences; after the GPU finishes the integral summation calculation, adopting a two-stage binary tree calculation structure; calculating an error by a carrier phase discriminator and a CA (certification authority) code phase discriminator on the CPU; and controlling a local carrier phase and a CA code phase to correct to realize the tracking. According to the invention, the defects of poor flexibility and black box operation of a hardware receiver system and the defect that various navigation satellite signal systems can not be supported are overcome. Meanwhile, the processing speed and precision of a software receiver can be enhanced, the cost of the software receiver is lowered, and a GNSS (global navigation satellite system) software receiver can track the multichannel navigation satellite signal in real time.
Owner:SOUTHEAST UNIV
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