Multichannel joint capture method of satellite navigation receiver
A technology of satellite navigation and joint capture, which is applied in the field of satellite navigation, can solve the problems of long signal capture time, slow signal search speed, and short signal capture time, and achieve convenient and efficient satellite positioning calculation, navigation star selection, and satellite effective data output. The effect of shortening the start-up time and widening the signal search range
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Embodiment 1
[0030] A method for multi-channel joint acquisition of satellite signals by a satellite navigation receiver, comprising the following steps:
[0031] 1) Establish two signal acquisition systems on the satellite navigation receiver, which are called signal acquisition system A and signal acquisition system B respectively, such as figure 1 As shown, each signal acquisition system includes a processor, memory, 12-way channel correlator and serial communication UART module, the processor controls the channel correlator, memory and serial communication UART module and exchanges data with the three;
[0032] The 12 channel correlators have a parallel structure, so that the same or different satellite signals can be captured and tracked at the same time;
[0033] Each channel correlator in the 12 channel correlators can only search and track one navigation satellite signal at the same time;
[0034] After each channel correlator in the 12 channel correlators completes the search for...
Embodiment 2
[0063] The difference with embodiment 1 is:
[0064] When the signal acquisition system A receives the available stars of the signal acquisition system B as stars 1, 2, 3, and 4, and the local available stars are 0, the union of the available stars is stars 1, 2, 3, and 4 , and the total number reaches 4, then put No. 1, No. 2, No. 3, and No. 4 stars directly into the local channel correlator, and through the placement of accurate stars and Doppler, the signal acquisition system B can complete the alignment within 25s The capture of available stars makes the number of available stars quickly reach 4 for positioning calculation.
Embodiment 3
[0066] The difference with embodiment 1 is:
[0067] When the local available stars of signal acquisition system A are 3, 4, 5, and 6 stars and have been positioned, after receiving the available stars 1, 2, and 3 of signal acquisition system B, although the union of available stars is 1, 2 , 4, 5, and 6 stars, with a total of more than 4 stars. However, since the positioning calculation has been completed locally, the effective navigation star information sent by the signal acquisition system B will not be inserted.
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