The deployment of maritime communication networks (MCNs) enables Internet-of-Things (IoT) applications, related to autonomous navigation, offshore facilities and smart ports. Still, the majority nodes, residing in MCNs lacks reliable connectivity. Towards this end, integrating unmanned aerial vehicles (UAVs) sixth generation (6G) MCN topologies results formation an segment, complementing shore base stations that may offer insufficient coverage, satellite communication, characterized by...

In sixth generation (6 G) networks, a massive number of users and devices must be connected, necessitating flexible resource allocation. this context, non-orthogonal multiple access (NOMA) has been proposed as promising technique to enable mass connectivity. This study presents performance analysis for the impact co-channel interference (CCI) on uplink NOMA networks. More specifically, it is considered that CCI introduced by randomly deployed terminals within cellular coverage area,...

This study investigates the opportunistic source-pair selection (OSPS) strategy for intercell interference (ICI) challenge in multi-user amplify-and-forward-based bi-directional wireless relaying networks. The method relies on of an appropriate SP node among N available nodes based each SP's maximum sum capacity (SC). According to analytical, asymptotic and Monte Carlo simulation results, OSPS strategy, besides achieving near-optimal solution ICI challenge, if number user-pair increases,...

Abstract Non-orthogonal multiple access (NOMA) is a promising solution to enhance the spectral efficiency of sixth generation (6G) networks. NOMA enables users be concurrently served, relying on superposition coding at transmitter and successive interference cancellation (SIC) receivers. However, in practice, hardware impairments channel estimation errors will lead incorrect signal ordering. This study analyses inverse (ISIC) downlink power-domain In worst case, ISIC inversely order N...

This paper proposes an advanced successive interference cancellation strategy for the non-orthogonal multiple access technique. The is based on mapping received signals into sub-groups. process aims to achieve highest rates each of After this process, conventional applied sub-groups signal separation process. According analytical, asymptotic and Monte-Carlo simulation results, outperforms in terms outage performance. In addition, new also provides a perspective user delay decoding

This paper investigates the opportunistic source-pair selection (OSPS) strategy for co-channel interference challenge in multiuser amplify-and-forward based bi-directional wireless relaying networks. The method relies upon of appropriate node among N available nodes on each source pair's maximum sum capacity. According to simulation results, OSPS strategy, besides achieving near optimal solution challenge, and if number user pair increases, also achieves diversity order by selecting...

This study investigates the impact of imperfect channel state information that is caused by feedback delay with time‐variant channels and also estimation errors an opportunistic source‐pair selection strategy. The investigation considers multi‐user bi‐directional wireless relaying networks. strategy selects appropriate node among N available nodes. based on each source pair's maximum sum‐rate in time slot. According to analytical, asymptotic, Monte–Carlo simulation results, strategy, besides...

This paper investigates the impact of imperfect channel state information that is caused by estimation errors on physical layer security. The investigation considers a dual-hop single amplify-and-forward (AF) based untrustworthy half/full-duplex bi-directional relay with finite number friendly jammers in system model. According to Monte-Carlo simulation results, error causes coding gain losses at low signal-to-noise ratio (SNR) regimes both for half and full-duplex cases. Results also show...

Abstract This study investigates power‐domain non‐orthogonal multiple access based wireless information exchange process. The investigation considers a dual‐hop non‐regenerative full‐duplex one‐way relaying networks in the system model, where source terminal transmits two different types of and subtracts interference signal at destination by using successive cancellation technique. outage probability, error achievable rate, ergodic rate considered is analytically derived. In addition,...

This paper investigates the inverse successive interference cancellation strategy for non-orthogonal multiple access. Unlike conventional strategy, technique firstly decodes information, which has least power allocation coefficient, and treats others as also subtracts decoded information from total received information. After this process, second-lowest interference. Analytical, asymptotic, Monte-Carlo simulations reveal that achieves better outage throughput performance allocated while it...

This paper investigates the opportunistic relay selection method for bi-directional wireless relaying networks. The investigation considers a dual-hop network with multiple half/full-duplex two-way terminal in system model. sum-rate based (SR-ORS) strategy selects best on maximum of user-pair and related terminal. According to analytical, asymptotic Monte-Carlo simulation results, SR-ORS provides better performance results when operates full-duplex mode.

This paper investigates the physical layer security of orthogonal frequency division multiplexing based wireless relaying network. The investigation considers a multi-user untrustworthy amplify-and-forward one-way full-duplex network in system model. According to Monte-Carlo simulation results, friendly jammers severely affect achievable secrecy outage probability performance and degrade curves high signal-to-noise ratio regimes. Results also show that model contains large number user-pairs...

This study investigates the effects of imperfect channel state information on leakage rate‐based untrustworthy relay selection strategies. The investigation considers that is because estimation errors and also feedback delay with time‐variant channels. three different types strategies, which are half‐duplex, full‐duplex, hybrid. a dual‐hop one/two‐way amplify‐and‐forward‐based half‐/full‐duplex wireless relaying network in system model. In addition, order to mitigate leakage, finite number...

This paper investigates the leakage rate based hybrid untrustworthy relay selection strategy. The investigation considers a dual-hop multiple half/full-duplex bidirectional amplify-and-forward wireless relaying network in system model. also that terminals are under effect of finite number friendly jammers' interference. According to analytical, asymptotic and Monte Carlo simulation results, strategy achieves cooperative diversity order high signal-to-noise regimes. However, jammers loop...

This paper investigates the low-density parity-check codes and orthogonal frequency division multiplexing technique effects on relay assisted sensor networks. The investigation utilizes Rician Rayleigh fading environments for performance analysis. also considers two different types of information exchange processes, which are direct cases. In case, terminal operates in amplify-and-forward decode-and-forward modes. Monte-Carlo based computer simulations reveal that 10-5 bit error rate value...

This paper investigates the feedback delay effects on physical layer security. The investigation considers a dual-hop single amplify-and-forward based untrustworthy half/full-duplex two-way relay with finite number of friendly jammers in system model. According to Monte-Carlo simulation results, degrades secrecy achievable rate and causes coding gain losses high signal-to-noise regimes. Results also show that if model increases then tends degrade losses. better can be achieved when terminal...

Abstract Non‐orthogonal multiple has the potential to improve connectivity of wireless networks by simultaneously allowing users and devices access medium. Meanwhile, full‐duplex communication can increase spectral efficiency network as transmission reception are concurrently performed. This article investigates two‐way relay relying on non‐orthogonal in power‐domain. More specifically, exchange superimposed signals perform utilizing echo‐cancellation successive interference cancellation....

<p>In this study, we focus on an MCN where the direct links towards a shore BS are not available, due to excessive fading conditions. For case, use UAV swarm provide improved wireless connectivity, adopting non-orthogonal multiple access (NOMA) for high resource efficiency. In downlink communication, UAVs take into consideration desired service rate and channel quality of their maritime nodes. uplink, employ dynamic decoding ordering enhance performance successive interference...

This paper investigates the channel estimation error effects on opportunistic relay selection strategy. The strategy is based selecting maximum sum-rate of half/full-duplex terminal among N. investigation considers a dual-hop multiple bi-directional wireless relaying networks in system model. According to Monte-Carlo simulation results, achieves cooperative diversity high signal-to-noise regimes both for cases. However, full-duplex case, if loop interference variances are relatively high,...