Modeling, Simulation of Multi Standard Wireless Receivers in MATLAB/SIMULINK

We present modeling of different block sets of direct conversion receiver in SIMULINK tool-kit environment for wireless local area network (WLAN) applications. Main block set of RF receiver circuit viz. low noise amplifiers (LNA), mixers, oscillators, filters and programmable gain amplifiers are implemented. While modeling different block sets, we have incorporated both ideal and non-ideal characteristics. Main incorporated non-idealities are due to thermal noise, characterized by the noise figure and the signal-to-noise ratio (SNR) non-linearity due to second order input-intercept point (IIP2) and third-order input intercept points (IIP3). Complete RF receiver for 4G standard is implemented. Our results show that SNR of RF receiver is improved compared to similar other implementations. Gain and noise parameters have been discussed at different frequencies to show usefulness of our work.