CAJ | 학술논문

在穿墙雷达(TWR)接收超宽带(UWB)回波信号的过程中，高速信号采集是其中的关键所在。首先基于传统等效采样方法，改进了其采样模式，能极大地提高等效采样的实时性，并减小精密延时电路的延时时间范围。其次利用跟踪保持芯片设计了一种新型等效采样接收机前端实现方案，不仅能降低等效采样技术对取样脉冲的要求，而且能充分发挥跟踪保持芯片高重复频率、高稳定和高度集成的优势。通过分析和仿真论证，实现了10 GHz 的等效采样频率，理论分析与仿真测试结果一致性良好。这种高度集成、简单高效的电路在超宽带穿墙雷达接收机中具有很好的应用前景。
재천장뢰체(TWR)접수초관대(UWB)회파신호적과정중，고속신호채집시기중적관건소재。수선기우전통등효채양방법，개진료기채양모식，능겁대지제고등효채양적실시성，병감소정밀연시전로적연시시간범위。기차이용근종보지심편설계료일충신형등효채양접수궤전단실현방안，불부능강저등효채양기술대취양맥충적요구，이차능충분발휘근종보지심편고중복빈솔、고은정화고도집성적우세。통과분석화방진론증，실현료10 GHz 적등효채양빈솔，이론분석여방진측시결과일치성량호。저충고도집성、간단고효적전로재초관대천장뢰체접수궤중구유흔호적응용전경。
The high-speed acquisition is the key process of the collection of ultra-wideband(UWB)echo signals in the through-wall radar(TWR).The equivalent sampling mode is optimized,which greatly im-proves the equivalent sampling rate and reduces the delay time range of the precise delay circuit.Moreover, the front-end of the equivalent sampling receiver is also optimized and designed,which not only reduces the demand for the sampling pulse effectively,but also exploits the advantages of high-repetition-frequency, high-stable,and high-integrated track and hold chip to the full.The front-end with maximum 10 GHz equiva-lent sampling rate is analyzed and simulated.Good agreement between the analyzed and the measured results is achieved.With features such as high-integrated structure,stable performance,and low cost,the proposed design is ideal for the UWB equivalent sampling receiver.