Study on outage performance gap of two destinations on CR-NOMA network

• Published in: Telkomnika 2020-02, Vol.18 (1), p.191-198
• Main Authors: Nguyen, Hong-Nhu, Le, Chi-Bao, Nguyen, Nhat-Tien, Do, Dinh-Thuan
• Format: Article
• Language: English
• Subjects: Advantages; Cognitive radio; Energy efficiency; Interference; Noise; Nonorthogonal multiple access; Performance evaluation; Random variables; Signal to noise ratio; Spectrum allocation; Wireless networks
• ISSN: 1693-6930; 2302-9293
• DOI: 10.12928/telkomnika.v18i1.13271

The results show that CR-NOMA provide fairness to two users in term of OP. 2.SYSTEM MODEL We assume that the system model with a downlink dual-hop underlay cognitive radio-non-orthogonal multiple access (CR-NOMA) network shown in Figure 1, in which there are a primary destination (Pd) who is located in primary network (PN), a secondary source (BS), a relay (R) operating in half-duplex mode and two destination users (U1; U2). By using NOMA, to detect signal ⅝ R decodes and removes si from the received signal. [...]it need be determined the signal-to-interference-plus noise ratio (SINR) and signal-to-noise ratio (SNR) to detect si and s2 at R as follows ... (4) Then, within the second slot, R forwards the detected superimposed signal УР^а1§1(κ) + jPRa2s2(k), where Pr is the transmitted power at R, š1(fc)and š2(fc)are the detected and forwarded data to the respective receivers. [...]U receives the following signal: ... [...]by alleviate interference existing in (6) it can be detected the remaining signal. [...]to detects its own signal at U2 , SNR is given by ...