Efficient data compression method realized based on FPGA (Field Programmable Gate Array)

Abstract

The invention discloses an efficient data compression method realized based on an FPGA, which comprises the following steps of: inputting data subjected to pulse compression, determining an operation coefficient of logarithm compression according to the bit width and the compression ratio of the input data, establishing an LOG quantizer, and forming a quantization coding table; enabling the data to pass through an LOG quantizer, and outputting a compressed coding value; transmitting the coded value to the ground, and enabling the ground data processing system to decompress the coded value by using the compressed operation coefficient; and finally carrying out imaging and outputting. The compression error of the method is smaller than that of a BAQ algorithm, the high compression ratio of 4: 1 and 2.5: 1 can be achieved through the method, the proportion of occupied FPGA resources is small, and the method is a novel on-orbit enforceable data compression method.

Description

technical field [0001] The invention relates to the technical field of radar data processing, in particular to an efficient data compression method based on FPGA. Background technique [0002] Ground penetrating radar realizes the detection of shallow underground targets through the emission of pulse waves and the collection of echo signals. Ground penetrating radar is widely used due to its advantages of fast speed, easy implementation and high resolution. [0003] The GPR echo signal may have the problem of large amount of information and large data files, especially the GPR system used in space missions, such as the TW-1 Mars rover radar, which has limited data storage space and satellite-ground link transmission. Practical problems such as large delays, limited transmission bandwidth, and inability to occupy satellite-ground communication channels in real time. In order to solve the above problems, the spaceborne radar system needs to use the compression algorithm to c...

AI Technical Summary

Problems solved by technology

[0009] Through the above analysis, due to the weak correlation of radar data, the compression ratio of the lossless compression algorithm is between 1.12 and 1.36, which cannot meet the high compression ratio requirements, while the spaceborne ground penetrating radar requires a compression ratio of 2.5:1 and 4:1 , so the spaceborne GPR data compression needs to use lossy compression algorithm

Images