Non-Linearity in Satellite Systems

This course covers the intricate concept of non-linearity in communication systems, with a special focus on wireless communication. It provides a comprehensive understanding of the challenges faced in long-distance wireless communication due to high error probability and delay. The course delves into the role of power amplifiers in transmitting large power from satellites to the ground and vice versa, and how the non-linear characteristics of practical devices impact the communication system. For instance, the course uses the example of a non-linear device receiving voltage input and producing voltage output to illustrate the concept of non-linearity. The course also explores the impact of non-linearity on cascaded systems and mitigation techniques. It further discusses amplifier characteristics, the concept of intermodulation products, and how non-linearity can be expressed in terms of Taylor coefficient. The course concludes with an introduction to the term 'noise power ratio', its significance, and the effects of non-linearity on spectrum spreading and adjacent channel interference.