The book is devoted to the use of the MATLAB matrix system in radio engineering calculations and in the modeling of electronic devices and systems. For the first time, the latest versions of MATLAB R2007a,b2008a,b2009a with extension packages Simulink 67, Signal Processing Toolbox, Filter Design Toolbox, RF Toolbox and Blockset, Wavelet Toolbox, Control Systems, SimPowerSystems, etc. are described. The latest Simscape and SimElectronics electronic circuit modeling packages are described.