Satellite modem synchronous interface data processing system and method
A data processing system and modem technology, applied in the field of satellite communication, can solve problems such as bit error, FIFO reading empty or overflow, synchronous interface out of sync, etc., to improve service rate, make up for the difference between service rate and clock frequency, and stabilize transmission Effect
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[0023] This embodiment proposes a method for implementing a synchronous interface in a satellite modem to solve the problem of how to deal with the problem between the working clock frequency of the synchronous interface and the equivalent data rate in the FPGA of the satellite modem. In the DCE working mode, the present invention controls the operating clock frequency of the V.35 synchronous interface through the clock control module, so that the number of data in the FIFO buffer module is stable within a certain interval, will not overflow, and will not read empty, thereby ensuring synchronization Stable transmission of interface data; refer to figure 1 as shown, figure 1It is a schematic diagram of the synchronous interface and the FPGA internal data interface in DCE mode. Taking the synchronous interface to transmit 2.048Mbps data stream as an example, the internal clock frequency of the DDS module is 60MHz, which generates a 2.048MHz clock. At this time, the FPGA send cl...
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