Distributed Space-Time Codes for Cooperative Networks with Partial CSI

Rajan, G. Susinder; Rajan, B. Sundar

doi:10.1109/wcnc.2007.171

Cited by 22 publications

(26 citation statements)

References 22 publications

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“…The A&F based distributed space time coding is of special interest because the operations at the relay nodes are greatly simplified and moreover there is no need for every relay node to inform the destination once every quasi-static duration whether it will be participating in the distributed space time coding process as is the case in D&F based distributed space time coding [13]. The design of practical DSTCs leading to reliable communication in wireless relay networks has been considered in [43][44][45].…”

Section: Distributed Space-time Codingmentioning

confidence: 99%

Distributed GABBA space-time codes in amplify-and-forward relay networks

Maham

Hjørungnes

Abreu

2009

IEEE Trans. Wireless Commun.

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Section: Distributed Space-time Codingmentioning

confidence: 99%

Distributed GABBA space-time codes in amplify-and-forward relay networks

Maham

Hjørungnes

Abreu

2009

IEEE Trans. Wireless Commun.

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“…From (26), it is clear that the condition for achieving maximum diversity is identical to that of co-located MIMO (14). Theorem 3 means that by using any STBC which satisfies the conditions (12) and achieves full diversity in co-located MIMO system, it is possible to do decoding of one symbol at a time and achieve full diversity, though not optimal in the ML sense, in a distributed setup with phase compensation done at the relay, even if (15) and (16) 8 proposed in [13].…”

Section: A Full-diversity Single-symbol Non-ml Detectionmentioning

confidence: 99%

“…where D j1,j2,j3 and D j1,j2,j3 , 1 ≤ j 1 , j 2 , j 3 ≤ N , are block diagonal matrices of the form in (13).…”

Section: Theoremmentioning

confidence: 99%

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Single-symbol ML decodable distributed STBCs for partially-coherent cooperative networks

Sreedhar¹,

Chockalingam

Rajan

2009

IEEE Trans. Wireless Commun.

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Abstract-Space-time block codes (STBCs) that are single-symbol decodable (SSD) in a co-located multiple antenna setting need not be SSD in a distributed cooperative communication setting. A relay network with N relays and a single source-destination pair is called a partially-coherent relay channel (PCRC) if the destination has perfect channel state information (CSI) of all the channels and the relays have only the phase information of the sourceto-relay channels. In this paper, first, a new set of necessary and sufficient conditions for a STBC to be SSD for co-located multiple antenna communication is obtained. Then, this is extended to a set of necessary and sufficient conditions for a distributed STBC (DSTBC) to be SSD for a PCRC, by identifying the additional conditions. Using this, several SSD DSTBCs for PCRC are identified among the known classes of STBCs. It is proved that even if a SSD STBC for a co-located MIMO channel does not satisfy the additional conditions for the code to be SSD for a PCRC, single-symbol decoding of it in a PCRC gives full-diversity and only coding gain is lost.

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“…This method does not require decoding at the relays and for high SNR it achieves the optimal diversity factor [19]. Design of practical D-STC that lead to reliable communication in wireless relay networks has also been recently considered [18], [20], [21] . In [18], practical distributed space-time codes were proposed using orthogonal and quasi-orthogonal designs which are originally used in the design of spacetime codes for multiple-antenna systems.…”

Section: Introductionmentioning

confidence: 99%

Alamouti distributed space-time coding with relay selection

Al-Qahtani

Alsanie

2014

16th International Conference on Advanced Communication Technology

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Abstract-This paper examines the impact of relay selection on the performance of Alamouti distributed orthogonal spacetime block coding (Al-DSTC) in a two-relay network. The SNRmaximizing is implemented at the receiver based on selecting the relay to cooperate or not. The receiver can always find the optimal selected relay by exhaustive search where the number of relays is only two. It is shown in this work that the proposed scheme obtains full diversity order and provides an additional array gain compared to conventional Al-DSTC. The proposed scheme has a lower bit error rate if compared to the beamforming when the transmit power is high. Our results show that the proposed scheme is more power efficient than the conventional Al-DSTC and cooperative beamforming. Also, the proposed scheme increase life time of the relay since 50% of the time the relay is off.

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Distributed Space-Time Codes for Cooperative Networks with Partial CSI

Cited by 22 publications

References 22 publications

Distributed GABBA space-time codes in amplify-and-forward relay networks

Distributed GABBA space-time codes in amplify-and-forward relay networks

Single-symbol ML decodable distributed STBCs for partially-coherent cooperative networks

Alamouti distributed space-time coding with relay selection

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