对连续三角波进行FM调制与解调。先生成单个三角波，将单个波连成连续波，通过FM调制后通过信噪比为20dB的信道，再通过限幅器和低通滤波器将信号恢复-Continuous triangular wave FM modulation and demodulation. Mr. triangular wave into a single, connected into a single continuous wave waves through FM modulation by the channel