Novel multiple access models and their probabilistic description

In conventional frequency hopping the entire available frequency band is divided into N subbands (following the terminology used in (Zigangirov, 2004) we shall further on refer to the set of all subbands available to the user as a hopset.). Each user’s transmitter chooses one of the N subbands in a pseudorandom manner and transmits a signal via the chosen subband using a conventional modulation technique (for the most part FSK is used). In the multiple access theory it is common to refer to each change of the subband in use as a hop. The process of switching between the subbands (which can be also interpreted in terms of assigning subbands to the users) is called frequency hopping. Frequency Hopping can be easily combined with the OFDM technique, which enables to reduce the distortion considered by both fadings and impulse noise (Note that OFDM is the fundamental technique for the most of the advanced telecommunications systems).