Distributed Closed-Loop Quasi-Orthogonal Space Time Block Coding with four relay Nodes: overcoming Imperfect Synchronization

Elazreg, Abdulghani M.; Abdurahman, F.; Chambers, Jonathon A.

doi:10.1109/wimob.2009.61

Cited by 5 publications

(14 citation statements)

References 16 publications

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“…For example, to reach BER at

10^{- 3}

, the new proposed approach including received signals through DT connection link requires approximately 9 dB and approximately 14 dB without including receiver signals through DT connection link. While, the distributed open‐loop QO‐STBC approach in [16] and [17] requires approximately 32 dB. Therefore, this figure illustrates that when the SNR region between 6 dB and 40 dB the BER performance of the new proposed approach including DT connection link is considerably smaller by 23 dB than the BER performance distributed open‐loop QO‐STBC scheme.…”

Section: Simulation Resultsmentioning

confidence: 89%

“…The simulation result in Figure 5, illustrates the BER performance of the new proposed scheme in the case of perfect synchronisation (PS) combined with and without received signal through DT connection link. Moreover, the open‐loop scheme for QO‐STBC in [16] and [17] are included as reference. It can be observed from Figure 5, the new proposed approach including and not including the received signals through DT connection link are provided performance improvement over the distributed open‐loop QO‐STBC in [16] and [17].…”

Section: Simulation Resultsmentioning

confidence: 99%

“…It can be seen that from the above analysis, the detection complexity of sub‐optimum scheme is low by using the innovative distributed OSTBC approach, and also this new approach does not require any feedback information from the receiver side to achieve full cooperative diversity order of

2 R

as compared with the approaches in [15] and [16].…”

Section: Improved Sub‐optimum Detection With New Distributed Ostbcmentioning

confidence: 96%

“…In this section, the proposed scheme so‐called sub‐optimum detection is introduced to overcome synchronisation issue between transmitting cooperative relay nodes. It can be used to combat the interference term of

{boldH}^{scriptH} I false(k false)

in (18), where

s^{*} false(3, k - 1 false)

and

s^{*} false(4, k - 1 false)

are known if the detection procedure has been adjusted correctly [15–17]. Therefore, the interference term

I (1, k)

in (15) can be removed before applying the linear transformer in (18).…”

Section: Improved Sub‐optimum Detection With New Distributed Ostbcmentioning

confidence: 99%

“…Finally, by substitutingŝ (3, k) in (24), when t = 4 to detect transmitted signalŝ(4, k), therefore the term (4, k) in ( 24) can be FIGURE 5 The BER performance of new distributed OSTBC assuming perfect synchronisation among the relay nodes with and without DT connection link. Also, BER performance of DT link and open-loop QO-STBC scheme in [16] and [17] are included as reference re-written as follows…”

Section: Improved Sub-optimum Detection With New Distributed Ostbcmentioning

confidence: 99%

See 4 more Smart Citations

Mitigating interference and reducing detection complexity in asynchronous cooperative relay network utilising new distributed space time block coding

Elazreg

Kharaz

2020

IET Communications

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The synchronisation in wireless cooperative relay networks is impossible to achieve in real environment utilising orthogonal space time block coding. There have been several approaches proposed to mitigate the effect of synchronisation among the relay nodes at the receiver. All have managed to reduce the inter-symbol interference at the expense of low data rate with high detection complexity. Others achieved full data rate and high cooperative diversity using high decoding complexity that requires a feedback link. In this paper, a new approach is presented that reduces inter-symbol interference, achieves full data rate and full cooperative diversity with low complexity. This uses a new efficient distributed orthogonal space time block coding design with a sub-optimum detection scheme utilising dual relay nodes. This reduces the number of timing misalignments among the relay nodes and minimises the detection complexity. Furthermore, the new proposed method uses linear decoding process to achieve full data rate and full cooperative diversity without the need for any a feedback link. The analytical analysis and simulation results confirmed that sub-optimum approach with the new efficient design are very effective at reducing the lack of synchronisation among the relay nodes at the destination node with low encoding and decoding complexities. How to cite this article: Elazreg AM, Kharaz AH. Mitigating interference and reducing detection complexity in asynchronous cooperative relay network utilising new distributed space time block coding.

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“…For example, to reach BER at

10^{- 3}

Section: Simulation Resultsmentioning

confidence: 89%

Section: Simulation Resultsmentioning

confidence: 99%

2 R

as compared with the approaches in [15] and [16].…”

Section: Improved Sub‐optimum Detection With New Distributed Ostbcmentioning

confidence: 96%

{boldH}^{scriptH} I false(k false)

in (18), where

s^{*} false(3, k - 1 false)

and

s^{*} false(4, k - 1 false)

are known if the detection procedure has been adjusted correctly [15–17]. Therefore, the interference term

I (1, k)

in (15) can be removed before applying the linear transformer in (18).…”

Section: Improved Sub‐optimum Detection With New Distributed Ostbcmentioning

confidence: 99%

Section: Improved Sub-optimum Detection With New Distributed Ostbcmentioning

confidence: 99%

See 3 more Smart Citations

Mitigating interference and reducing detection complexity in asynchronous cooperative relay network utilising new distributed space time block coding

Elazreg

Kharaz

2020

IET Communications

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show abstract

Sub-Optimum Detection Scheme for Distributed Closed-Loop Quasi Orthogonal Space Time Block Coding in Asynchronous Cooperative Two Dual-Antenna Relay Networks

Elazreg

Kharaz

2015

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Enhancing Performance of Asynchronous Cooperative Relay Network with Partial Feedback

Tran

2018

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Distributed Closed-Loop Quasi-Orthogonal Space Time Block Coding with four relay Nodes: overcoming Imperfect Synchronization

Cited by 5 publications

References 16 publications

Mitigating interference and reducing detection complexity in asynchronous cooperative relay network utilising new distributed space time block coding

Mitigating interference and reducing detection complexity in asynchronous cooperative relay network utilising new distributed space time block coding

Sub-Optimum Detection Scheme for Distributed Closed-Loop Quasi Orthogonal Space Time Block Coding in Asynchronous Cooperative Two Dual-Antenna Relay Networks

Enhancing Performance of Asynchronous Cooperative Relay Network with Partial Feedback

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