CAJ | 학술논문

非正弦时域正交调制系统解调时采用匹配滤波法,利用脉冲组间正交性实现脉冲同时分离与检测。然而,在接收端,通常情况下脉冲组很难保持严格正交,导致系统性能下降。为了提高在脉冲组非严格正交情况下系统的解调性能,对白化变换解相关检测法进行了分析,结果表明,该方法性能优于匹配滤波法,与传统解相关法相比,低信噪比时性能较好,而高信噪比时则性能要差。该结论对系统的工程化实现具有一定的参考意义。
비정현시역정교조제계통해조시채용필배려파법,이용맥충조간정교성실현맥충동시분리여검측。연이,재접수단,통상정황하맥충조흔난보지엄격정교,도치계통성능하강。위료제고재맥충조비엄격정교정황하계통적해조성능,대백화변환해상관검측법진행료분석,결과표명,해방법성능우우필배려파법,여전통해상관법상비,저신조비시성능교호,이고신조비시칙성능요차。해결론대계통적공정화실현구유일정적삼고의의。
It is necessary to keep orthogonality of pulses of the non-sinusoidal orthogonal modulation sys- tem in time domain. But it is usually difficult. Several methods of demodulation are analyzed. The simu- lations demonstrate that the performance of the decorrelation method based on whiting transform is better than that of matching filter. Comparison with the traditional decorrelation method, it is better when SNR is low and worse when SNR is high.