| 1. | Aiming to achieve mini - type designment , and transmitting farther on the setting frequency band , direct frequency modulation is chosen after comparing the advantage of amplitude modulation with that of frequency modulation
为了实现微小型化的设计,并且使系统在设定的传输频段上传输距离较远,在比较调幅与调频的优缺点后,我们选择了直接调频的调制方式。 |
