Performance Assessment for 5g Access Techniques /

Abstract

Nowadays, Non-Orthogonal Multiple Access (NOMA) has gained great attention due to its higher spectral efficiency (SE) over Orthogonal Multiple Access (OMA). NOMA can play a vital role in improving the capacity of future networks. Moreover, power domain NOMA multiplexes the users in power domain utilizing the Superposition Coding (SC) and allows them to access the whole spectrum simultaneously. Furthermore, at the receiver side Successive Interference Cancelation (SIC) is applied for signal detection. In this thesis, the Nakagami-m fading channel is more suitable to study the channel model. Therefore, the generation of the Nakagami-m fading channel represents the main contribution of this work. This is why the special Nakagami-m function will be generated. This thesis addresses two main channel models. First of all, the effect of conventional channel model on dual NOMA user (conventional NOMA system two users) is studied. This will be done to get complete modelling of the NOMA system. Secondly, the channel model is changed to be based on a statistical Nakagami-m generation function. The channel statistical model is used by taking into consideration the correlation coefficient matrix. Finally, the statistical channel model is deployed with multi user and perform the assessment technique. The obtained results show that the maximum efficiency that may be reached for conventional NOMA (two users NOMA) will occur at transmitted power of 25dBm. Whereas, by increasing the number of users up to sixteen users the maximum Energy Efficiency (EE) will be achieved at power level of 32dBm. Therefore, increasing more power the system will suffer from more interference, so that the obtained EE will be degraded.