Abstract: Impulse ground penetrating radar (GPR) has some obvious advantages in the field survey, such as simple waveform generation, high pulse repetition, no interference in frequency domain and so on. The common GPR systems are based on the impulse radar technique and are prevalent in the commercial market. However, small dynamic range is the common problem in the GPR receiver system currently, which limits its application in the field of deep penetrating. In this thesis, the large dynamic range receiver technology of impulse GPR system is studied deeply and time-varying gain dynamic range compression technology is proposed for the equivalent sampling circuit. The technology can provide 20 dB dynamic range compression for the received signal. A physical receiver has also been developed with good performance.