multifunctional airborne navigation equipment
A kind of navigation equipment and multi-functional technology, applied in the direction of instruments, measuring devices, electrical components, etc., can solve the problems of high aircraft flight safety risks, reduce flight safety risks, and not widely used by aircraft, so as to reduce safety risks and strengthen execution capabilities , The effect of reducing the cost of modification
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Embodiment 1
[0075] Such as Figure 1~4 As shown, the multifunctional airborne navigation equipment, the navigation equipment includes a signal processing unit, a service module, an ADS-B communication unit and an antenna, wherein,
[0076] The signal processing unit is used to process all relevant business data onboard, and encode the business data and send it to the ADS-B communication unit as a radio frequency signal; it is used to receive the radio frequency signal sent by the ADS-B communication unit, and analyze the ADS-B The message is sent to the service module after parsing; the signal processing unit includes peripheral hardware and interface circuit, ARM processor and FPGA hardware module, wherein,
[0077] The peripherals and the interface circuit are connected to the service module for information interaction with the service module;
[0078] The ARM processor is used to respond to the information of peripherals and interface circuits, and to comprehensively schedule the info...
Embodiment 2
[0095] Such as Figure 1~5 As shown, on the basis of Embodiment 1, in the FPGA hardware module, the input processing of the radio frequency signal includes the following steps:
[0096] S1: Use a high-speed A / D sampling chip to collect the input RF signal;
[0097] S2: FPGA performs amplitude correlation, preamble detection, and deinterleaving and decoding processing on the sampled data to obtain the value of each bit and add confidence to each bit;
[0098] S3: Send the signal to the CRC verification circuit for CRC verification. When the number of low confidence bits is within the allowable range of the threshold, the bit recovery operation can be performed, otherwise the received message is discarded;
[0099] S4: Send the message after the bit recovery into the FIFO inside the FPGA, and send an interrupt request at the same time, and the ARM processor reads the message from the FIFO.
Embodiment 3
[0101] Such as Figure 1~5 As shown, on the basis of Embodiment 1 or 2, the business module includes a navigation information processing module, an altitude information processing module and a Beidou short message processing module, and the navigation information processing module, an altitude information processing module and a Beidou short message processing module The text data processing modules are all connected with the ARM processor.
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