Asil Koc

Outage probability of full-duplex fixed-gain AF relaying in Rayleigh fading channels

In this study, we investigate the outage performance of full-duplex fixed-gain amplify-and-forward (AF) relaying systems over Rayleigh fading channels. New exact outage probability expression of full-duplex fixed-gain AF relaying is derived analytically in single-integral form by using the cumulative distribution function (CDF) approach. The analytical results for outage performance are verified by Monte-Carlo type computer simulations. We observe that the error floor caused by loop-interference at the full-duplex fixed-gain relay occurs for larger values of the loop interference power. Furthermore, the results are compared with full-duplex variable-gain AF relaying results given in the literature. In addition to simpler structure advantage of fixed-gain relaying compared to variable-gain relaying, it is shown that full-duplex fixed-gain AF relaying provides better outage performance. Contrary to the full-duplex fixed-gain AF relaying, the error floor is observed for the full-duplex variable-gain AF relaying for even small values of the loop interference power.

Full-duplex spatial modulation systems under imperfect channel state information

In this paper, we investigate the performance of bi-directional full-duplex (FD) systems using spatial modulation (SM) technique, called as FD-SM systems, over Rayleigh fading channels in the presence of imperfect channel state information (I-CSI). The effect of residual loop-interference (LI) due to the FD transmission is also taken into consideration. The upper bounds for bit error rate (BER) expressions of FD-SM systems are derived for both PSK and QAM constellations by pairwise error probability (PEP) calculations. The analytical results are verified by Monte Carlo simulation results and shown to become very tight when signal-to-noise ratio (SNR) increases. Additionally, we observe that FD-SM system outperforms the conventional bi-directional half-duplex (HD) systems as long as either the spectral efficiency increases or the LI cancellation improves.

Two-Way Full-Duplex Spatial Modulation Systems With Wireless Powered AF Relaying

This letter proposes a dual-hop two-way full-duplex cooperative system, where spatial modulation is used at the sources and energy harvesting is employed at the wireless powered relay. We combine the physical-layer network coding and the fixed-gain amplify-and-forward relaying techniques for two-way transmission. For the simultaneous information and wireless power transfer, the power-splitting protocol is employed at the relay, which has no external power supply. A new unified tight upper-bound bit error rate (BER) expression is derived in a closed-form for both full-duplex and half-duplex transmission schemes. The accuracy of our analyses is verified by various Monte Carlo type computer simulations. The numerical results reveal that the full-duplex scheme can provide considerably better BER performance compared to the conventional half-duplex scheme as the quality of loop-interference cancellation improves and/or the spectral efficiency requirement increases.

Outage Probability of Two-Way Full-Duplex AF Relay Systems over Nakagami-m Fading Channels

In this paper, performance of two-way full-duplex cooperative systems under residual loop- interference (LI) is analyzed in terms of outage probability over Nakagami-

Performance analysis of full-duplex spatial-modulated communication systems

m

Unified outage performance analysis of two-way/one-way full-duplex/half-duplex fixed-gain AF relay systems

fading channels. At the relay node of the proposed system, physical- layer-network-coding technique and variable-gain full-duplex amplify-and-forward relaying method are combined for two-way transmission. End-to-end signal-to-interference-plus-noise-ratio (SINR) expression is derived for different power transmissions at the source and relay nodes. New exact outage probability expression is obtained in a single-integral form by using cumulative distribution function of the end-to-end SINR. The analytical results are verified by Monte-Carlo simulations. We also provide lower-bound and asymptotic expressions in closed-form for the outage performance. It is shown that the outage performance of the system is enhanced as long as either the transmit power or the efficiency of LI cancellation process increases. We also observe that the outage probability converges to an error floor due to the residual LI component at the source and relay nodes.

Relay selection in two-way full-duplex relay networks over Nakagami-m fading channels

In this work, the performance of full-duplex spatial-modulated communication systems is investigated over Rayleigh fading channels. An upper bound for the average bit error probability of the proposed system is derived in a closed-form. During the analyses, the effect of the residual loop interference due to the full-duplex transmission is also considered. The accuracy of the theoretical analysis is verified by Monte Carlo type computer simulations. It is observed that the proposed system provides better performance compared to the conventional spatial-modulated systems with half-duplex transmission.

Outage performance of full duplex physical layer network coding systems in Nakagami-m channels

In this paper, the outage performance of two-way/one-way full-duplex/half-duplex fixed-gain amplify-and-forward (AF) relay systems are investigated over Rayleigh fading channels in the presence of residual loop-interference (LI). A unified end-to-end signal-to-interference-plus-noise expression is obtained. Then, a new unified exact outage probability expression for all fixed-gain AF relay systems is derived in a closed-form by using cumulative distribution function approach. The accuracy of theoretical analyses are validated by Monte Carlo type computer simulations. We show that two-way full-duplex fixed-gain AF relay systems provide better outage performance as long as the quality of LI cancellation improves and/or the bandwidth efficiency increases.

Outage performance of fixed-gain and variable-gain AF full-duplex relaying in non-identical Nakagami- m fading channels

We analyze the outage performance of relay selection in two-way full-duplex amplify-and-forward cooperative systems in the presence of residual loop-interference (LI) over Nakagami-m fading channels. In the proposed system, a relay node is selected according to max-min policy and the physical-layer-network-coding technique is applied for two-way transmission. By using end-to-end signal-to-interference-plus-noise-ratio, a new exact outage probability expression is derived in a single-integral form. The numerical and Monte-Carlo simulation results verify the analysis. Moreover, lower-bound and asymptotic expressions for the outage probability are obtained in closed-form. The numerical results reveal that the max-min selection policy provides a significant performance improvement for two-way full-duplex relaying. We observe that the outage performance can be enhanced as long as either the number of relay nodes, the transmit power, or the efficiency of the LI cancellation process increases.

Tam-Çift-Yönlü AF Röle Seçim Sistemlerinin Nakagami-m Kanallardaki Performansı

In this paper, outage performance of full duplex physical layer network coding systems under residual self-interference over Nakagami-m fading channels is investigated. Physical layer network coding technique and amplify-and-forward method with variable-gain relaying are used at the relay node of the proposed system. End-to-end signal-to-interference-plus-noise-ratio is derived for the equal power transmission at the source and relay nodes. The outage probability expression is obtained in a single-integral form by using cumulative distribution function approach. The analytical results are verified by Monte-Carlo simulations.