15 years experience in Software Defined Radio (SDR), communication system, RF & mixed mode. main skill : ACSP (Analog Circuits & Signal processing) which includes RF, ADC section and take the user to Base Band FPGA Circuit. my favorite research subject is Receiver configurations (superheterodyne, Direct Conversions & Direct RF Sampling). So, Experience using GNURadio and USRPs.* Skills:- Design, Simulation and implementation of superheterodyne SDR systems (RF Down Convertor, ADC & FPGA Board)- Design and implementation of SDR systems Base on USRP B200 mini, LimeSDR LMS7002M and other hardware like them.- Connecting SDR Hardware (Like LimeSDR and …) and raspberry pi 4 mini computer in Linux.- Writing this software in C, C++, Python or other languages in a Linux or Windows environment- experience with RF communication link requirements* Knowledge:- Knowledge of developing RF link budgets- Digital Signal Processing- Familiar with Spread spectrum techniques and concepts(Frequency Hopping, direct Sequence)- Good understanding of ADC and DAC principles of operation- Spectral analysis- Experienced with bench equipment; spectrum analyzers, oscilloscopes, etc.- Strong fundamentals in "signals and systems" (basic transforms, filters, aliasing, analysis in both continuous and discrete domains, interpolation, decimation, etc).- Strong fundamentals in digital communications (modulation, coding, synchronization, fading, doppler, multiple access, channel capacity, etc)- Strong fundamentals analog concepts (amplifiers, analog filters, gain and delay variation, reflections, compression, etc)- Strong Knowledge of digital communication systems