Optimization of the Nonlinear Behavior of Power Amplifiers in Satellite Digital Image Transmission Using Particle Swarm Method

Nonlinear behavior of the power amplifiers in satellite transmitters causes a lot of errors in digital image transmission. So, even by using a moderate linearizer, the bit error rate (BER) will greatly improve. In this paper, the particle swarm optimization has been used as an effective method with good conversion speed. Effects of an optimized cubic linearizer on digital image transmission are evaluated. The simulations results for the bit error rate as a function of signal to noise ratio (SNR), third order intercept point (TOI), and noise figure (NF) of low noise amplifier (LNA) are compared with each other.