DDS-based Doppler compensation device in real-time water sound communication
A technology of Doppler compensation and underwater acoustic communication, applied in the field of high-precision Doppler compensation processing platform structure, can solve the problems of small calculation amount, large calculation amount and storage amount, difficult sampling rate, etc., and achieves strong applicability. , The effect of high-speed and stable application
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[0033] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0034] combine figure 1 , the field programmable logic device FPGA2 is the connection node of each functional module circuit of the processing board. It has abundant on-chip resources and general I / O pins, and plays the role of interconnecting circuits and storage control. The analog-to-digital conversion circuit 4 at the front end of the processing board is connected with the general-purpose I / O port of the FPGA2 through a set of data buses through a parallel interface, and mainly completes digital quantization of analog signals. The high-performance DSP1 is the core processing chip of the entire processing board. It is connected to the FPGA2 through the data bus of the EMIFA interface on the chip. The chip selection, read and write control lines, and some address lines of the EMIFA interface are all connected to the general I / O of the FPGA2. , to realize the t...
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