Research on Users Joint Precoding and Detection in Two-way Relay Systems

Wang Lin; Rui Guo-sheng; Zhang Hai-bo

doi:10.11999/JEIT141455

Volume 37 Issue 7

Jul. 2015

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Wang Lin, Rui Guo-sheng, Zhang Hai-bo. Research on Users Joint Precoding and Detection in Two-way Relay Systems[J]. Journal of Electronics & Information Technology, 2015, 37(7): 1550-1555. doi: 10.11999/JEIT141455

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Wang Lin, Rui Guo-sheng, Zhang Hai-bo. Research on Users Joint Precoding and Detection in Two-way Relay Systems[J]. Journal of Electronics & Information Technology, 2015, 37(7): 1550-1555. doi: 10.11999/JEIT141455

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Research on Users Joint Precoding and Detection in Two-way Relay Systems

doi: 10.11999/JEIT141455

Received Date: 2014-11-20
Rev Recd Date: 2015-03-13
Publish Date: 2015-07-19

Abstract

Abstract

Two-way relay cooperative communication system demonstrates significant gain in spectral efficiency when two user nodes exchange information via a relay node. For improving the Bit Error Rate (BER) performance, a joint precoding and detection algorithm is proposed based on Lattice Reduction (LR) when all the nodes equipped with multiple antennas. The proposed algorithm modifies the channel gain matrix into more orthogonal matrix by the complex lattice reduction. Precoding and detection algorithms are combined to apply the modified matrix. The relay node processes the receiving signal by simple modulo operation and amplification. The main complexity of the algorithm is in the two user nodes. The simulation evaluations show that, the computational complexity of the algorithm is increasing just because the channel gain matrix is modified by lattice reduction. The proposed joint precoding and detection algorithm can significantly improve the performance of BER and achieve full diversity, hence it is applicable to engineering.
- Cooperative communication,
- Two-way relaying,
- Lattice Reduction (LR),
- Precoding,
- Detection

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References(20)

References

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