Vector Precoding Design Based on Nested-lattice-coding for MU-MIMO Relay Systems

JIANG Hua; JIAO Juncai; DU Sidan

doi:10.11999/JEIT210729

Volume 44 Issue 10

Oct. 2022

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JIANG Hua, JIAO Juncai, DU Sidan. Vector Precoding Design Based on Nested-lattice-coding for MU-MIMO Relay Systems[J]. Journal of Electronics & Information Technology, 2022, 44(10): 3485-3491. doi: 10.11999/JEIT210729

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JIANG Hua, JIAO Juncai, DU Sidan. Vector Precoding Design Based on Nested-lattice-coding for MU-MIMO Relay Systems[J]. Journal of Electronics & Information Technology, 2022, 44(10): 3485-3491. doi: 10.11999/JEIT210729

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Vector Precoding Design Based on Nested-lattice-coding for MU-MIMO Relay Systems

doi: 10.11999/JEIT210729

JIANG Hua^{1, 2
,
,},
JIAO Juncai²,
DU Sidan¹

1.
Shool of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
2.
School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing 211816, China

Funds: The National Natural Science Foundation of China(61702259), The Natural Science Foundation of the Jiangsu Higher Education Institutions of China (17KJB510024)

Received Date: 2021-07-19
Accepted Date: 2022-02-15
Rev Recd Date: 2022-01-17

Available Online: 2022-02-18

Publish Date: 2022-10-19

Abstract

Abstract

This paper focused on the problem of the multi-access transmission in multiuser Multiple-Input Multiple-Output (MIMO) relay systems. In order to improve the performance in terms of system capacity and bit error rate, a joint precoding approach for the base station and the relay station is proposed by exploiting nested lattice coding which is capable of achieving modulo-channel capacity with additive Gaussian noise. At base station, the nested lattice coding is equipped up with Vector Perturbation (VP) precoding, leading to a reduction in transmit power. Since the modulo operation with respect to VP precoding is identical to that in nested coding, the relay can not only depress the noise power but also remove the redundant information with one-step modulo operation. An integer-forcing precoding method is designed for the relay to reduce the equivalent noise. Moreover, the acquisition of both the integral coefficient matrix and the vector perturbation matrix is provided. The transmit power allocation between the base station and the relay is optimized to maximize the system sum rate. The outstanding performance of the proposed scheme is validated by the simulation results.
- Multiple-Input Multiple-Output (MIMO) relays,
- Multiuser,
- Precoding,
- Nested lattice codes

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References(24)

References

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