Why do we need angle modulation?

We need angle modulation, including frequency modulation (FM) and phase modulation (PM), for several reasons:

1. Improved noise resistance: Angle modulation is less susceptible to noise interference than amplitude modulation (AM), which makes it more reliable for transmitting information over long distances or in noisy environments.

2. Higher fidelity: FM can transmit high-quality audio signals with superior fidelity, which is important for applications such as radio broadcasting and music transmission.

3. Compatibility with existing receivers: FM is compatible with existing radio receivers, which makes it an attractive option for broadcasting and other applications.

 4. Efficient use of bandwidth: PM and FM can transmit more data per unit of bandwidth than other modulation techniques, which makes them well-suited for modern digital communication systems.

 5. Flexibility: Angle modulation techniques can be adapted to different communication needs and signal requirements, making them versatile and flexible for a wide range of applications.

Overall, angle modulation is a reliable and efficient technique for transmitting information over a communication channel, and it has many advantages over other modulation techniques.