Modern researches in field of mobile network depend on network infrastructure in a specific region. Nowadays, the actual issue is reforming of the existing frequency range for LTE deployment. The most common band is 900/1800 MHz, which in usual licensed for the GSM networks. It known that LTE net-work core can be easily integrated with the existing GSM infrastructure. The convergent base stations had been already known which can operate with GSM/LTE/WCDMA simultaneously.
It carried out the theoretical researches of bit error probability and efficiency of subchannels of wireless networks based on LTE / LTE-Advanced technologies in case of use of quadrature phase manipulation (QPSK), М-ary quadrature amplitude modulation (M-QAM) and offer М-ary amplitude modulation of many components (M-AMMC). The theoretical researches of bit error probability executed in case of use of offer correlation.