CAJ | 학술논문

简要介绍了利用现代数字信号处理技术实现的适合宽带超宽带接收机的数字边带分离混频器的数学原理，同时对数字边带分离混频器进行了优化，并用MATLAB在L波段（1～2 GHz）对数字边带分离混频器优化进行了仿真验证，在500 MHz的带宽内实现了优于300 dB的边带抑制率。这些工作为利用数字技术实现数字边带分离混频器提高了运算速度，符合射电天文接收机向宽带超宽带和集成化发展的趋势。
간요개소료이용현대수자신호처리기술실현적괄합관대초관대접수궤적수자변대분리혼빈기적수학원리，동시대수자변대분리혼빈기진행료우화，병용MATLAB재L파단（1～2 GHz）대수자변대분리혼빈기우화진행료방진험증，재500 MHz적대관내실현료우우300 dB적변대억제솔。저사공작위이용수자기술실현수자변대분리혼빈기제고료운산속도，부합사전천문접수궤향관대초관대화집성화발전적추세。
We describe the mathematical principle of a Digital Sideband-Separating Mixer ( DSSM ) to work with a wideband or ultra-wideband receiver based on modern digital signal-processing technologies .We also realize certain optimization of a DSSM .We present MATLAB simulations of an optimized DSSM in the L-band (1GHz to 2GHz).Sideband Rejection Ratios better than 300dB are achieved at all frequencies in a band of a width of 500MHz.Our work can improve computing speeds of future DSSMs , and it fits development trends of radio-astronomy receivers , i.e.those toward hardware integration and using wider bands .