Ren Yongfeng

Application of Self-adapting Radar Video Echo Acquisition System based on LZW Algorithm

Sampling radar video echo signal is widely known as an effective method to explore the target information in remote sensing. Large number of echoes must be acquired in real time. A typical radar acquisition system involves high-speed ADC, front-end filter and signal process module. A multi-channel adaptive variable sampling rate data acquisition system based on FPGA and I2C bus is introduced. Not only can it be used in the field of radar video echo data acquisition system but also be used to achieve normal data acquisition in industry. By writing the frame data into E2PROM and the design of interface between FPGA and E2PROM, multi-channel data programmable sampling is realized. In addition, in order to reduce the data volume in signal process module, real-time lossless compression algorithm LZW based on FPGA is proposed. It can be realized by programming in FPGA. The algorithm principle of LZW and the coding flow are introduced. By using different file types to test the compression algorithm, satisfactory results can be obtained. This lossless compression algorithm based on hardware can reduce the complexity of the signal processing to some extent. DOI : http://dx.doi.org/10.11591/telkomnika.v12i2.3210 Full Text: PDF

The Design of the Monitoring Circuit for the Rocket Ignition Process

In ignition process of the space rocket engine, design of the monitoring circuit is very important. If the monitoring circuit can not reliably work, separation of the rocket engine will be greatly affected, thereby the safe ignition of the rocket engine will be affected. In this paper, aiming at the real problem in the ignition process, the monitoring circuit has been improved on the design. A large number of tests showed that the improved monitoring circuit can run reliably. In addition, the safe ignition for the rocket engine can be realized by the application of it.