A Comparative Study of Perfect and Imperfect SIC in Downlink PD-NOMA based on Sharing Bandwidth

Abstract

In this paper, a scheme for sharing bandwidth-non-orthogonal multiple access (SB-NOMA) based on coordinated multi-point (CoMP) is proposed to improve total sum capacity and user capacity. The proposed algorithm is implemented in a cellular network platform, and the performance is analysed via two cases. First, the network performance is evaluated considerning both channel conditions and interference effects, which is addressed as the worst-case condition. The total network capacity is evaluated assuming Channel Estimation Error (CEE) and Imperfect Successive Interference cancelation (SIC). Second, the network is tested assuming ideal case condition materialized by canceling the effect of inter-channel interference (ICC) of the Base Station (BS) on Near User (NUE). The simulation results show that the capacity increases for SB-NOMA with installed by increasing the number of Cooperative BS (CBSs), where (2bits/Hz/s) is the gain in total capacity that is achieved by increasing the CBSs by one. Moreover, power allocation to the proposed scheme shown (0.15 - 0.85) represents the best value for maintaining capacity achievement.

Capacity Analysis of Intelligent Reflecting Surface assisted RSMA System with Perfect and Imperfect CSI for 6G

“…As an illustration, suppose the computed channel between BS to IRS and IRS to the user is shown as hk 1 and hk 2 . The CEE can be determined from the received signal [19]. The CEE from BS to IRS is obtained by,…”

“…By solving the problem of maximizing WSR in MISO-BC, the author presented RSMA with SDMA and NOMA in ref [18]. In ref [19], a novel IRS-RS framework to enhance the performance of multi-user downlink communication system by employing an IRS near to cell-edge users at the BS. In this paper they have used chi-square distribution to observe the outage probability of each user.…”