CAJ | 학술논문

为了对具有微小波形差的超窄带EBPSK调制信号进行检测,提出了一种特殊的共轭零极点滤波器.该滤波器可将调制的相位信息转化为幅度信息,产生上凸或下凹现象.通过分析分解波形的滤波响应,运用叠加原理对该滤波器产生的特殊现象进行了定性的解释;利用频率响应的相频特性表达式对其进行了直观分析.实验结果表明:利用零极点滤波器产生的寄生调幅现象可以采用门限判决,从而简化了EBPSK系统接收机结构,仿真的误码率曲线表明了该滤波器对EBPSK传输系统性能有很大的提升作用.
위료대구유미소파형차적초착대EBPSK조제신호진행검측,제출료일충특수적공액령겁점려파기.해려파기가장조제적상위신식전화위폭도신식,산생상철혹하요현상.통과분석분해파형적려파향응,운용첩가원리대해려파기산생적특수현상진행료정성적해석;이용빈솔향응적상빈특성표체식대기진행료직관분석.실험결과표명:이용령겁점려파기산생적기생조폭현상가이채용문한판결,종이간화료EBPSK계통접수궤결구,방진적오마솔곡선표명료해려파기대EBPSK전수계통성능유흔대적제승작용.
In order to detect the EBPSK (extended binary phase shift keying) modulation signal with very tiny waveform difference,a special conjugate pole-zero filter is proposed,which can transform the phase information into amplitude information,resulting in up convex or down concave.By analyzing the filter response of decomposition waveform,the special phenomenon produced by the filter is qualitatively interpreted using the superposition principle,and a visual analysis is given by the expression of the phase-frequency characteristics.The simulation results show that the simple threshold decision can be used according to the phenomena of parasitical amplitude modulations,which simplifies the EPBSK receiver structure.The BER (bit error rate) curve indicates that this filter may achieve a great improvement in the performance of the EBPSK transmission system.