A Network Coding Approach to Non-Regenerative Multi-Antenna Multi-Group Multi-Way Relaying

Degenhardt, Holger; Klein, Anja

doi:10.1109/vtcspring.2013.6691829

Cited by 7 publications

(18 citation statements)

References 12 publications

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“…For the receive filters at the nodes, matched filters are considered. For RS, the processing matrix presented in [7] is used as a baseline and it is modified to consider that only L nodes transmit in the MAC phase.…”

Section: Filters At the Relay Station And At The Nodesmentioning

confidence: 99%

“…The relay transceiver filter of [7] minimizes the mean squared error in each BC phase. Let the signal s l,c from S l be broadcast in BC phase t on subcarrier c. The estimate of s l,c on the receiving node S k , denoted byŝ k,l,c , is calculated aŝ…”

Section: B Transceiver Filter At the Relay Stationmentioning

confidence: 99%

“…Considering that only L nodes transmit on each subcarrier, the optimization problem of [7], for the calculation of G c,t , is rewritten as…”

Section: B Transceiver Filter At the Relay Stationmentioning

confidence: 99%

“…The calculation of G c,t follows the procedure described in [7]. The detailed derivation is omitted here and only the final results are presented.…”

Section: B Transceiver Filter At the Relay Stationmentioning

confidence: 99%

“…As stated in [5]- [7], applications like video conferences or multiplayer gaming require the exchange of messages among a group of nodes, i.e., each node has to transmit its own message and has to receive the messages from the other nodes in the group. This exchange of messages can be performed via multiway relaying [5].…”

Section: Introductionmentioning

confidence: 99%

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A resource requirement aware transmit strategy for non-regenerative multi-way relaying

Ortiz

Degenhardt

Klein

2015

2015 IEEE Wireless Communications and Networking Conference (WCNC)

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Non-regenerative multi-antenna multi-way relaying is considered. The scenario consists of a group of single-antenna nodes that want to communicate using multiple subcarriers. Each node has a message which every other node in the group should receive. The communications between the nodes are performed via a half-duplex multi-antenna relay station. It is assumed that the nodes have individual resource requirements. A new transmit strategy, in which the individual resources requirements of the nodes are considered, is proposed. To ensure that the relay station has enough spatial dimensions to separate the incoming signals, it is proposed that the number of transmitting nodes per subcarrier is equal to the number of antennas at the relay station. Moreover, it is proposed that the required numbers of subcarriers are calculated according to the buffer level of the nodes, reflecting the amount of data a node has to transmit. To allocate the required number of subcarriers to each node, the proposed transmit strategy performs an efficient subcarrier allocation. Numerical results show that the proposed strategy outperforms existing transmit strategies especially when the number of antennas at the relay station is smaller than the number of nodes.

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Section: Filters At the Relay Station And At The Nodesmentioning

confidence: 99%

Section: B Transceiver Filter At the Relay Stationmentioning

confidence: 99%

“…Considering that only L nodes transmit on each subcarrier, the optimization problem of [7], for the calculation of G c,t , is rewritten as…”

Section: B Transceiver Filter At the Relay Stationmentioning

confidence: 99%

“…The calculation of G c,t follows the procedure described in [7]. The detailed derivation is omitted here and only the final results are presented.…”

Section: B Transceiver Filter At the Relay Stationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A resource requirement aware transmit strategy for non-regenerative multi-way relaying

Ortiz

Degenhardt

Klein

2015

2015 IEEE Wireless Communications and Networking Conference (WCNC)

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Known-interference aware iterative MMSE filter design for non-regenerative multi-way relaying

Degenhardt

Klein

2013

2013 5th IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)

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Multi-group multi-way relaying with reduced number of relay antennas

Ganesan

Al-Shatri

et al. 2014

2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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In this paper, multi-group multi-way relaying is considered. There are L groups with K nodes in each group. Each node wants to share d data streams with all the other nodes in its group. A single MIMO relay assists the communications. The relay does not have enough antennas to spatially separate the data streams. However, the relay assists in performing interference alignment at the receivers. In order to find the interference alignment solution, we generalize the concept of signal and channel alignment developed for the MIMO Y channel and the two-way relay channel to group signal alignment and group channel alignment. In comparison to conventional multi-group multi-way relaying schemes [1,2], where at least R ≥ LKd − d antennas are required, in our proposed scheme, exploiting the multiple antennas at the nodes, only R ≥ LKd − Ld antennas are needed. The number of antennas required at the nodes to achieve this is also derived. It is shown that the proposed interference alignment based scheme achieves more degrees of freedom than the reference schemes without interference alignment.Index Terms-Multi-way relaying, group communication, interference alignment.

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A Network Coding Approach to Non-Regenerative Multi-Antenna Multi-Group Multi-Way Relaying

Cited by 7 publications

References 12 publications

A resource requirement aware transmit strategy for non-regenerative multi-way relaying

A resource requirement aware transmit strategy for non-regenerative multi-way relaying

Known-interference aware iterative MMSE filter design for non-regenerative multi-way relaying

Multi-group multi-way relaying with reduced number of relay antennas

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