"Navigare necesse est!" - If one compares wired and wireless/mobile communications several differences can berecognized in such fields as security, power consumption, mediumaccess, channel behavioretc. However, themost differently handled resource is bandwidth. In case ofwired networkslink capacity can overcome almost any limitations by deploying optical fibres. Spectral efficiency is one of the mostsignificant key parameters of every mobile system. Spectrally efficient wireless solutionsare fairly complex, they consist of techniques applied in physical and data link layers.Call Admission...