Diversity-Multiplexing Trade-Off of Half-Duplex Single Relay Networks

Parvaresh, Farzad; Soltanizadeh, Hediyeh

doi:10.1109/tit.2017.2654241

Cited by 11 publications

(13 citation statements)

References 15 publications

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“…For example, we often expect to see an increase in the capacity of the network when the half-duplex relays are replaced with full-duplex ones. Regardless of this fact, for certain multiplexing gains and average SNR exponents of different links, the two networks perform the same in terms of DMT [6], [7], [25].…”

Section: B Proofsmentioning

confidence: 99%

On the Diversity-Multiplexing Trade-off of Hybrid Diamond Relay Channels

Jorjani¹,

Narimani²,

Tabataba³

et al. 2022

Preprint

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The diversity-multiplexing trade-off (DMT) of a diamond relay channel in a quasi-static slow Rayleigh fading environment is studied, where one of the relays operates in half-duplex mode while the other one is full-duplex; hence, the term hybrid is used to refer to this channel. DMT is a known powerful tool that captures the inherent tension between the reliability and the transmission rate in a wireless communication network at high signal-to-noise ratios (SNR). In this study, we have assumed that the average SNRs of different links vary at different rates, each represented by an exponent at high SNR. These average SNR exponents are categorized into two different classes: In Class I, both of the relays are placed either in close proximity to the source or in close proximity to the destination, whereas in Class II one of the relays is closer to the source while the other one is closer to the destination. Subsequently, for Class I and for a special symmetric case of Class II, an explicit expression of the DMT of the static quantize-map-and-forward (SQMF) strategy and the optimal static schedule in the half-duplex relay, is derived. The non-symmetric case of Class II can numerically be studied using the optimization problem provided in the paper for any given parameters. As a corollary, our analysis shows that for Class I, the SQMF strategy in the proposed hybrid diamond relay channel reaches the ideal full-duplex DMT upper bound if the degrees of freedom provided by the path through the full-duplex relay is greater than or equal to that provided by the path through the half-duplex relay, or if the degrees of freedom provided by the former is less than that provided by the latter, but still large enough to support the desired multiplexing gain.

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Section: B Proofsmentioning

confidence: 99%

On the Diversity-Multiplexing Trade-off of Hybrid Diamond Relay Channels

Jorjani¹,

Narimani²,

Tabataba³

et al. 2022

Preprint

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“…To understand the relationship between achievable diversity and multiplexing gains, diversity multiplexing tradeoff (DMT) [15] has been popularly used in various channels [16]- [19]. In [16] and [17], DMT was improved via the time-sharing scheme between IA and joint decoding in a 4-user clustered Z interference channel and K-user interference channel, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The authors of [18] derived the DMT at the secondary receiver for the multiple-access channel and user-selection schemes in an interweave multiuser cognitive radio system, considering the spectrum sensing effect. In [19], the authors analyzed DMT of a dynamic quantize-map-and-forward strategy in halfduplex single-relay networks. It showed that by optimizing listening time of the relay, the strategy can achieve the optimal DMT for half-duplex single-relay networks with local channel state information.…”

Section: Introductionmentioning

confidence: 99%

On-off Switched Interference Alignment for Diversity Multiplexing Tradeoff Improvement in the 2-User X-Network With Two Antennas

Kim

Kang

Choi

2019

IEEE Trans. Wireless Commun.

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To improve diversity gain in an interference channel and hence to maximize diversity multiplexing tradeoff (DMT), we propose on-off switched interference alignment (IA) where IA is intermittently utilized by switching IA on/off. For on-off switching, either IA with symbol extension or IA with Alamouti coding is adopted in this paper. Deriving and analyzing DMT of the proposed schemes, we reveal that the intermittent utilization of IA with simultaneous non-unique decoding can improve DMT in the 2-user X-channel with two antennas. Both the proposed schemes are shown to achieve diversity gain of 4 and DoF per user of 4 3 . In particular, the on-off switched IA with Alamouti coding, to the best of our knowledge, surpasses any other existing schemes for the 2-user X-channel with two antennas and nearly approaches the ideal DMT.

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“…On the other hand, most of previous works focus on halfduplex relaying (see [9]- [13] and references therein), where the relay cannot receive and forward simultaneously. Thus, more time slots are needed compared with the full-duplex relaying, and further decreasing the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

Full-Duplex Relaying With Quantize-Map-and-Forward

2018

IEEE Access

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The quantize-map-and-forward (QMF) has been recently proved to achieve the capacity of arbitrary networks within a bounded gap and optimal diversity-multiplex tradeoff performance. This paper investigates and analyzes the QMF for the full-duplex (FD) relaying. Different from previous works, the relay has no access to any instantaneous channel state information (CSI), and only the statistical CSI of all channels is available. A closed-form expression for the outage probability is then derived. Due to the nonsmoothness of the resulting expression, an approximate one with the smooth outage performance is further given. However, the resulting one is non-convex in general, and four suboptimal solutions of the quantizer design are derived. For comparison, the FD relaying with hybrid QMF/decode-and-forward is also studied. Besides, when the direct transmission (DT) is not available in both schemes, outage probability analysis and optimal quantizer design are also investigated. Simulation results demonstrate the correctness and tightness of the derived closed-form expressions for outage probabilities and close-to-optimal performance of the suboptimal quantizer design with DT.INDEX TERMS Full-duplex, quantize-map-and-forward, hybrid quantize-map-and-forward/decode-andforward.

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Diversity-Multiplexing Trade-Off of Half-Duplex Single Relay Networks

Cited by 11 publications

References 15 publications

On the Diversity-Multiplexing Trade-off of Hybrid Diamond Relay Channels

On the Diversity-Multiplexing Trade-off of Hybrid Diamond Relay Channels

On-off Switched Interference Alignment for Diversity Multiplexing Tradeoff Improvement in the 2-User X-Network With Two Antennas

Full-Duplex Relaying With Quantize-Map-and-Forward

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