High-Performance Cooperative Demodulation With Decode-and-Forward Relays

Wang, Tairan; Cano, Alfonso; Giannakis, Georgios B.; Laneman, J. Nicholas

doi:10.1109/tcomm.2007.900631

Cited by 599 publications

(521 citation statements)

References 11 publications

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“…We also assume that each node is operated in a half-duplex mode, 1 To expound a little further, in [10] it was demonstrated that the generalized STSK scheme subsumes many other MIMO arrangements, such as OSTBCs, BLAST, LDCs and SM schemes. 2 The synchronization accuracy achieved by the Medium Access Control (MAC) layer is typically lower than the symbol-synchronized simultaneous transmissions of the relays. either receiving or transmitting in a given time slot.…”

Section: System Modelmentioning

confidence: 99%

“…1, the SN transmits its information to the M RNs as well as to the DN. As noted in [2], the SN first attaches Cyclic Redundancy Check (CRC) bits to its information bits in order for the RNs to be able to detect the potential decoding errors and hence to avoid the propagation of DF errors to the DN. Then the CRC-encoded bits are mapped to the L −constellation point PSK/QAM scheme in order to generate the symbols…”

Section: A Source Modelmentioning

confidence: 99%

“…In recent years, cooperative Space-Time Codes (STCs) [1], [2] have been extensively investigated due to their potential to achieve a high transmit diversity gain, where a collection of distributed nodes act as a Virtual Antenna Array (VAA), which are positioned sufficiently far apart for experiencing uncorrelated Multiple-Input Multiple-Output (MIMO) channels. Furthermore, this VAA arrangement enables us to avoid the employment of multiple RF chains at each node.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Packet-Reliability-Based Decode-and-Forward Distributed Space-Time Shift Keying

Sugiura

Chen

Hanzo

2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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Abstract-Motivated by the recent concept of Space-Time Shift Keying (STSK), we propose a novel cooperative STSK scheme, which is capable of achieving a flexible rate-diversity tradeoff, in the context of cooperative space-time transmissions. More specifically, in our cooperative STSK scheme each Relay Node (RN) activates Decode-and-Forward (DF) transmissions, depending on the success or failure of Cyclic Redundancy Checking (CRC). We propose a novel bit-to STSK mapping rule, where according to the input bits, one of the Q pre-assigned dispersion vectors is activated to implicitly convey log 2 Q bits, which are transmitted in combination with the classic log 2 L-bit modulated symbol. Additionally, we introduce a beneficial dispersion vector design, which enables us to dispense with symbol-level Inter-Relay Synchronization (IRS). Furthermore, the Destination Node (DN) is capable of jointly detecting the signals received from the source-destination and relay-destination links, using a low-complexity single-stream-based Maximum Likelihood (ML) detector, which is an explicit benefit of our Inter-Element Interference (IEI)-free system model. More importantly, as a benefit of its design flexibility, our cooperative STSK arrangement enables us to adapt the number of the RNs, the transmission rate as well as the achievable diversity order.

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Section: System Modelmentioning

confidence: 99%

Section: A Source Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Packet-Reliability-Based Decode-and-Forward Distributed Space-Time Shift Keying

Sugiura

Chen

Hanzo

2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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“…Jointly with Orthogonal Frequency Division Multiplexing (OFDM) [3] or Orthogonal Frequency Division Multiple-Access (OFDMA) [4] it can also provide reliability. Additionally, the idea of increasing coverage, capacity and reliability in future wireless networks by using cooperative single-antenna relays has recently attracted much attention [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

mentioning

confidence: 99%

“…Relay schemes can be categorized into three different groups: Amplify-and-Forward (AF) [7,8,12,[15][16][17][18], Compress-and-Forward (CF) [21,9] and Decode-and-Forward (DF) [5-7, 10,11,13,20]. In the AF schemes, relays amplify (and sometimes transform [8]) the received signal and broadcast it to the destination.…”

mentioning

confidence: 99%

Virtual Maximum Ratio Transmission for Downlink OFDMA Relay-based Networks

Jiménez

Gameiro

Armada

2010

Wireless Pers Commun

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In this paper, a novel and practical transmission scheme for a Multiple Input Multiple Output-Orthogonal Frequency Division Multiple Access (MIMO-OFDMA) relaybased network is proposed and evaluated. We coin the term Virtual Maximum Ratio Transmission (VMRT) for the scheme which obtains diversity and array gain at both links in a two-hop transmission, while keeping the complexity low. Besides, the requirements of Channel State Information needed at the different network elements such as the Base Station, Relay Station or User Terminals are also limited, and so the feedback. The obtained global performance by using proposed VMRT outperforms other schemes. Diversity gains larger than 6 can be easily obtained with a reduced number of relays. For this reason, VMRT is a good candidate to achieve high speed transmission or increase coverage and reliability in slow varying channels for relay-based networks.

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References

2010

Cooperative Communications

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High-Performance Cooperative Demodulation With Decode-and-Forward Relays

Cited by 599 publications

References 11 publications

Packet-Reliability-Based Decode-and-Forward Distributed Space-Time Shift Keying

Packet-Reliability-Based Decode-and-Forward Distributed Space-Time Shift Keying

Virtual Maximum Ratio Transmission for Downlink OFDMA Relay-based Networks

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