Development of pseudo random coded subsurface UWB GPR

作者：Wang Wei^*; Zhang Qunying; Fang Guangyou

来源：Chinese Journal of Scientific Instrument, 2012, 33(8): 1902-1908.

• Code length
• Coded signal
• Data rates
• Design complexity
• Detection capability
• Digital chips
• Field experiment
• Ground Penetrating Radar
• Ground penetrating radar (GPR)
• Large-time bandwidths
• Low Power
• M sequence
• Pseudo random
• Real-time sampling
• Sampling method
• Sampling technique
• Serial-to-parallel conversion
• UWB
• UWB signal generation
• UWB signals

Pseudo random coded signal has great potential for its use in ground penetrating radar since it has large time bandwidth product and good autocorrelation characteristics. In this article, the principle and specific implementation method of a pseudo random coded UWB GPR system is introduced. The UWB signal generation and sampling method based on digital chip largely reduce the design complexity and make the system debugging easy. Serial-to-parallel conversion technique realizes the data rate conversion from FPGA to high speed DAC. Compound sampling technique reduces the real-time sampling rate and therefore reducers the cost. Field experiment results show that pseudo random coded UWB signal can be used in GPR effectively;it can detect the targets under ground with very low power. Increasing the code length can increase the transmitted energy while keeping the resolution unchanged, therefore the detection capability can be improved.

• 出版日期2012
• 单位中国科学院大学