Abstract
In this paper, we investigate power domain division-based multiple access (PDMA) to support the base stations (BS) equipped with multiple antennas to serve mobile users. Such a system deploys multiple input single output (MISO)-based wireless transmission and a full-duplex (FD) scheme. Furthermore, such MISO PDMA system consists of BS employing transmit antenna selection to reduce complexity in signal processing at the receivers. We distinguish two kinds of mobile users, device-to-device (D2D) users and traditional users. In such MISO PDMA, there exists a trade-off between outage performance of each PDMA user and power allocation factors. Since the implementation of the FD scheme at PDMA users, bandwidth efficiency will be enhanced despite the existence of self-interference related to such FD. In particular, exact expressions of outage probability are derived to exhibit system performance with respect to D2D users. Finally, valuable results from the simulated parameters together with the analytical results show that MISO PDMA can improve its performance by increasing the number of transmit antennas at the BS.
Highlights
To adapt fast development in wireless techniques, many protocols and topologies have been introduced
The results indicate the probability that both D2D users obtain improved outage performance in multiple input single output (MISO) power domain division-based multiple access (PDMA) depends on the power level of the base station (BS) and the required target rates
The exact analytical results and simulation results are in excellent agreement, and the outage probability will be constant at high-signal to noise ratio (SNR) regimes
Summary
To adapt fast development in wireless techniques, many protocols and topologies have been introduced. Multiple users need to be served to access the core network, and it requires the base station in a cellular network that can transmit a mixture of signals to them To address this shortcoming, PDMA or non-orthogonal multiple access (NOMA) has been recently introduced to improve the spectral efficiency and to provide fairness in resource allocation. This scheme can be mainly described as follows: by using CSI feedback, the best transmit antenna out of all transmit candidates to maximize the post processing signal to noise ratio (SNR) at the MRC output of receive antennas, is selected to transmit data for the corresponding user These analytical discussions motivate us to explore improved performance of MISO PDMA. With resource allocation scheme is promising approach They further derived expressions of the outage probability that both users obtain higher rates in NOMA under a fixed power control strategy. Notation: The cumulative distribution function of a real-valued random variable X is denoted by FX (.), f X (.) stands for probability density functions, while Pr (.) symbolizes outage probability
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