Position and speed combined estimation method for satellite navigation
A technology of joint estimation and speed estimation, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems that cannot be applied to the application environment with high requirements for speed measurement accuracy
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[0087] The invention provides a joint estimation method of satellite navigation position and velocity. Embodiment structural block diagram such as figure 2 As shown, it includes three parts: GNSS receiver 201 , position and velocity estimation unit 202 and timer 203 . Wherein, the GNSS receiver includes two parts: a radio frequency module 204 and a baseband signal processing module 205 . The GNSS satellite signal is sent to the input terminal of the radio frequency module 204 through the antenna, and the signal is converted into an analog intermediate frequency signal after being down-converted by the module. The analog intermediate frequency signal output by the radio frequency module 204 is sampled by the AD according to the 48MHz clock to form a digital intermediate frequency signal, which is input to the baseband signal processing module 205 . The baseband signal processing module 205 is realized by FPGA, and completes the work of GNSS satellite signal acquisition, trac...
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