Coded Bi-directional Relaying

Larsson, Peter; Johansson, Niklas; Sunell, Kai-Erik

doi:10.1109/vetecs.2006.1682945

Cited by 332 publications

(271 citation statements)

References 2 publications

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“…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 (DF) protocol was first introduced to TWRNs. By allowing two sources to transmit simultaneously to the relay, a two TS analog network coding (ANC) scheme with amplify-and-forward (AF) protocol [8], [9] and a two TS physical-layer network coding (PNC) scheme using estimated-and-forward (EF) protocol [10], [11] were proposed for 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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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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“…Network coding is emerged as a promising solution to achieve higher bandwidth efficiency in both wired [1][2][3] and wireless networks [4][5][6] . Especially in wireless network, a network-coded bi-directional relaying (NCBR) has been proposed to improve system throughput [5] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…Especially in wireless network, a network-coded bi-directional relaying (NCBR) has been proposed to improve system throughput [5] . The key features of NCBR are that packets from the mobile station (MS) and base station (BS) are jointly encoded through bit-wise network coding, e.g., XOR, and then the composite packet is broadcasted back to each station.…”

Section: ⅰ Introductionmentioning

confidence: 99%

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Network-Coded Bi-Directional Relaying Over an Asymmetric Channel

Ryu¹,

Lee²,

Kang³

2013

The Journal of Korea Information and Communications Society

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In this paper, we consider network-coded bi-directional relaying (NCBR) schemes over an asymmetric channel, in which bi-directional links have the different channel quality, as well as the asymmetric traffic load. In order to deal with asymmetric nature, two different types of NCBR schemes are considered: network coding after padding (NaP) and network coding after fragmentation (NaF). Even if NaP has been known as only a useful means of dealing with the asymmetry in traffic load up to now, our analysis shows that its gain can be significantly lost by the asymmetry in channel quality, under the given bit error performance constraint.Furthermore, it is shown that NaF always outperforms NaP, as well as traditional bi-directional relaying scheme.주저자：고려대학교 전기전자파공학과 무선정보시스템공학 연구실,

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“…In 3P-TWR, two source nodes send information to the relays successively over the first two phases, and the relays broadcast a mixture of the received signal during the third Broadcasting (BC) phase. The 3P-DF-TWR is first proposed in [6] for the single-relay case, where the relays perform Network Coding (NC) [7] at bit-level through exclusive-or operations. NC is power efficient in that the relays only need to send a single symbol, based on which both sources can uniquely decode the information from the other end by use of its own side information.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Two-Way Relaying with Non-Coherent Differential Modulation

Guan

Liu

2011

IEEE Trans. Wireless Commun.

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Abstract-This work focuses on a two-way denoise-andforward relaying system using non-coherent Differential Binary Phase-Shift Keying (DBPSK) modulation, which has the welldefined relay denoising function when channel state information is unknown. We first design the relay denoising function and source decoders using Maximum Likelihood (ML) principles for the general case with parallel relays. As the ML denoising function is hard to manipulate, we approximate it as a multi-user detector followed by a physical layer network coding encoder and obtain the closed-form relay decoding error. For the singlerelay case, we show that the ML source decoder is actually equivalent to the typical DBPSK decoder for the relay-source channel and thus derive the exact end-to-end Bit Error Rate (BER). To minimize the average BER, we also investigate the power allocation problem by use of asymptotic analysis at high Signal-to-Noise Ratio (SNR). We show that the optimal source power is inversely proportional to the square root of the channel gain of the source-relay channel, and the optimal relay power decreases with SNR. For the multi-relay case, though the exact analysis is intractable, we develop upper bound and lower bound on BER and show that the diversity order is exactly ⌈ 2 ⌉ .Index Terms-Two-way relaying, differential modulation, BER, diversity order, power allocation.

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Coded Bi-directional Relaying

Cited by 332 publications

References 2 publications

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

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

Network-Coded Bi-Directional Relaying Over an Asymmetric Channel

Performance Analysis of Two-Way Relaying with Non-Coherent Differential Modulation

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