A distributed differential space-time coding scheme with analog network coding in two-way relay networks

Huo, Qiang; Song, Lingyang; Li, Yonghui; Feng, Yange; Jiao, Bingli

doi:10.1109/glocom.2012.6503864

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…However, in the fast fading environment, e.g., mobile-to-mobile (M2M) scenarios [9], it is difficult for source nodes and relay nodes to estimate the channel gain accurately and the periodical inserted pilot symbols for channel estimation will significantly reduce the data rate of the whole networks [2], [10], [11]. Since channel estimation is challenging and costly, differential modulation without need of any CSI is a practical solution for multihop networks, particularly when the number of relays is large.…”

Section: Introductionmentioning

confidence: 99%

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Novel multihop transmission schemes using selective network coding and differential modulation for two-way relay networks

Huo

Song

et al. 2013

2013 IEEE International Conference on Communications (ICC)

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In this paper, we propose a novel multihop transmission scheme using selective network coding (NC) and differential modulation (SNC-DM) for two-way relay networks (TWRNs) when neither the source nodes nor the relay nodes know the channel state information (CSI). We first develop a bidirectional transmission scheme using NC where the information exchange in a two-way multihop relay network with the arbitrary number of hops can be completed in four transmission phases. As a result, the maximum achievable throughput does not decrease as the number of hops increases. To overcome the error propagation in the multihop transmission with decode-and-forward (DF) protocol in wireless fading channels, a selective NC scheme is proposed. In addition, we apply differential modulation in the proposed scheme to avoid channel estimation in the multihop networks. The performance of the proposed scheme is analyzed, and a closedform frame error rate (FER) expression is derived. It is shown that the proposed scheme achieves significant improvements in both FER performance and network throughput compared to the conventional multihop DF scheme in TWRNs. The analytical results are verified through numerical simulations.

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Section: Introductionmentioning

confidence: 99%

“…Recently NC has attracted significant interest in wireless networks to bring the benefits of potential overall network throughput increase [2]. Particularly, the application of NC in a simple threenode two-way relay network (TWRN) has attracted significant interests [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Novel multihop transmission schemes using selective network coding and differential modulation for two-way relay networks

Huo

Song

et al. 2013

2013 IEEE International Conference on Communications (ICC)

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“…A few proposals in the literature consider the design of distributed space–time coding (DSTC) coupled with differential modulation for synchronous TWR systems, for example, . The models in assume two‐phase transmission and the lack of a direct link between the two users. On the other hand, assumes a three‐phase transmission and that a direct link between the two users exists.…”

Section: Introductionmentioning

confidence: 99%

Differential modulation for asynchronous two‐way relay systems over frequency‐selective fading channels

Salim

Duman

2016

Wireless Communications

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In this paper, we propose two schemes for asynchronous multi-relay two-way relay (MR-TWR) systems in which neither the users nor the relays know the channel state information (CSI). In an MR-TWR system, two users exchange their messages with the help of N R relays. Most of the existing works on MR-TWR systems based on differential modulation assume perfect symbol-level synchronization between all communicating nodes. However, this assumption is not valid in many practical systems, which makes the design of differentially modulated schemes more challenging. Therefore, we design differential modulation schemes that can tolerate timing misalignment under frequency-selective fading. We investigate the performance of the proposed schemes in terms of either probability of bit error or pairwise error probability. Through numerical examples, we show that the proposed schemes outperform existing competing solutions in the literature, especially for high signal-to-noise ratio (SNR) values.

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“…Network coding (NC) has been known as an efficient technique to significantly increase the capacity of communication networks [1][2][3]. Recently, it has been applied to improve the transmission efficiency of two-way relay networks (TWRNs) [4,5]. In [6,7], a three time slot (TS) NC scheme based on decode-and-forward protocol was first introduced to TWRNs.…”

Section: Introductionmentioning

confidence: 99%

Source and physical‐layer network coding for correlated two‐way relaying

Huo

Song

et al. 2016

IET Communications

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In this paper, we study a half-duplex two-way relay channel (TWRC) with correlated sources exchanging bidirectional information. In the case, when both sources have the knowledge of correlation statistics, a source compression with physical-layer network coding (SCPNC) scheme is proposed to perform the distributed compression at each source node. When only the relay has the knowledge of correlation statistics, we propose a relay compression with physical-layer network coding (RCPNC) scheme to compress the bidirectional messages at the relay. The closed-form block error rate (BLER) expressions of both schemes are derived and verified through simulations. It is shown that the proposed schemes achieve considerable improvements in both error performance and throughput compared with the conventional non-compression scheme in correlated two-way relay networks (CTWRNs).

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A distributed differential space-time coding scheme with analog network coding in two-way relay networks

Cited by 4 publications

References 21 publications

Novel multihop transmission schemes using selective network coding and differential modulation for two-way relay networks

Novel multihop transmission schemes using selective network coding and differential modulation for two-way relay networks

Differential modulation for asynchronous two‐way relay systems over frequency‐selective fading channels

Source and physical‐layer network coding for correlated two‐way relaying

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