Outage Analysis of Co-Operative Two-Path Relay Channels

Abstract-In this paper, the spatial modulation (SM) technique is employed at the source and relay nodes in a full-duplex twoway relay channel (FD-TWRC) to support spectral-efficient bidirectional communications while guaranteeing a low cost implementation. Maximum likelihood (ML) detectors are employed at each node that is subject to an intrinsic self-loop interference (SI). We first propose a tight upper bound on the average bit error probability (ABEP). Then based on the ABEP upper bound, an asymptotic ABEP expression is derived in the high SNR regime. Exploiting the asymptotic ABEP, an exact SNR threshold for the selection between FD-TWRC-SM and half-duplex (HD)-TWRC-SM is derived in a closed form, which sheds light on when it is beneficial to select the FD (or HD) mode. In addition, the power allocation (PA) among sources and relay is investigated, through which an optimal PA factor in terms of ABEP is obtained. All analytical results derived in this paper are verified by Monte Carlo simulations, from which some new insights are obtained on the performance of FD-TWRC-SM.

show abstract

“…(45), which can be represented in a closed form when N R,2 ≤ 4. If N R,2 > 4, the positive real root of Eq.…”

Section: Proposition 4 the Optimal Pa Factor Is Computed As Followsmentioning

confidence: 99%

On the Performance of Full-Duplex Two-Way Relay Channels With Spatial Modulation

Zhang

Kim

et al. 2016

IEEE Trans. Commun.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This means that depending on whether state H 1 or H 0 occurs in slot t, the relays may or may not suffer from interference, thus leading to different decoding results for x S (t + 1) in time slot (t + 1). In other words, this imposes a dependency of the decoding status of x S (t + 1) on that of x S (t) [20], [21].…”

Section: A a Markov Chain-based Analytical Modelmentioning

confidence: 99%

“…sive time lots, the exact outage probability of FD-MRC is obtained by using a Markov chain-based analytical model [20], [21], which points beyond the state-of-theart where the attainable diversity order is characterized without explicitly analyzing the outage probability [14].…”

mentioning

confidence: 99%

On the Performance of Full-Duplex Multi-Relay Channels With DF Relays

Feng

et al. 2017

IEEE Trans. Veh. Technol.

Self Cite

View full text Add to dashboard Cite

Abstract-In this paper, we consider a two-hop full-duplex multi-relay channel (FD-MRC) for exploiting the high spectral efficiency of FD systems and the diversity gains of multirelay systems. Employing a decode-and-forward (DF) relaying protocol, the single best relay is selected from those relays that have successfully decoded the source message, which then helps forward the source message to the destination. Meanwhile, a new message is broadcasted by the source and all the N relays, including the selected best one, attempt to decode this new message. In view of the effect of both inter-relay interference and self-interference (SI), a one-step correlation exists between the relay decoding results in successive time slots. Then a Markov chain-based analytical model is utilized for analyzing the exact outage probability of FD-MRC. Furthermore, a closeto-full diversity order of (N − 1 + µ) is analytically proved to be attainable for FD-MRC, where µ is a factor characterizing the efficiency of SI mitigation.

show abstract

“…Careful examination of (5) reveals that the ML solution of the data detection over the sub-carrier s can be obtained by employing a Viterbi decoding algorithm with a path metric given by (7). The conceptual block diagram of the first detector is shown in figure 2.…”

Section: Figure 2 the Conceptual Block Diagram Of The First Detectormentioning

confidence: 99%

“…However, this technology faces significant reduction in the spectral efficiency due to the half-duplex constraint at the relays. Two-path cooperative (TPC) transmission protocols have been introduced to enhance such reduction [5,7], where two relays alternatively forward data of the transmitted node to destination. Generally speaking, the previous work on TPC can be categorized into two groups of studies.…”

Section: Introductionmentioning

confidence: 99%