Multiobjective optimization of input low noise amplifier for common GPS/Galileo/GLONASS/Compass satellite navigation system receiver

As all the four main navigation systems (GPS, Galileo, GLONASS, and Compass) work in similar frequency bands, it is reasonable to create a common input low noise amplifier for all of them. Although the whole chip including a lot of correlators and other digital circuits is quite complicated, a common low noise antenna preamplifier operating at the frequencies from 1.1 to 1.7 GHz could be quite simple and efficient. We have proposed finding a compromise between the amplifier´s amplification and noise figure under several natural constrains by multiobjective optimization. Moreover, we have utilized our enhancement of known optimization algorithm (the goal attainment method) to improve its efficiency, which led to finding a very good design tradeoff for the amplifier.