Optimal Precoding for a QoS Optimization Problem in Two-User MISO-NOMA Downlink

Zhiyong Chen; Zhiguo Ding; Peng Xu; Xuchu Dai

doi:10.1109/LCOMM.2016.2555907

Optimal Precoding for a QoS Optimization Problem in Two-User MISO-NOMA Downlink

Zhiyong Chen, Zhiguo Ding, Peng Xu, Xuchu Dai

Electrical Engineering

University of Science and Technology of China

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

In this letter, based on the non-orthogonal multiple access (NOMA) concept, a quality-of-service optimization problem for two-user multiple-input-single-output broadcast systems is considered, given a pair of target interference levels. The minimal power and the optimal precoding vectors are obtained by considering its Lagrange dual problem and via Newton's iterative algorithm, respectively. Moreover, the closed-form expressions of the minimal transmission power for some special cases are also derived. One of these cases is termed quasi-degraded, which is the key point and will be discussed in detail in this letter. Our analysis further figures out that the proposed NOMA scheme can approach nearly the same performance as optimal dirty paper coding, as verified by computer simulations.

Original language	British English
Article number	7456242
Pages (from-to)	1263-1266
Number of pages	4
Journal	IEEE Communications Letters
Volume	20
Issue number	6
DOIs	https://doi.org/10.1109/LCOMM.2016.2555907
State	Published - Jun 2016

Keywords

5G
multiple input- single-output
non-orthogonal multiple access
precoding
quality-of-service

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10.1109/LCOMM.2016.2555907

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title = "Optimal Precoding for a QoS Optimization Problem in Two-User MISO-NOMA Downlink",

abstract = "In this letter, based on the non-orthogonal multiple access (NOMA) concept, a quality-of-service optimization problem for two-user multiple-input-single-output broadcast systems is considered, given a pair of target interference levels. The minimal power and the optimal precoding vectors are obtained by considering its Lagrange dual problem and via Newton's iterative algorithm, respectively. Moreover, the closed-form expressions of the minimal transmission power for some special cases are also derived. One of these cases is termed quasi-degraded, which is the key point and will be discussed in detail in this letter. Our analysis further figures out that the proposed NOMA scheme can approach nearly the same performance as optimal dirty paper coding, as verified by computer simulations.",

keywords = "5G, multiple input- single-output, non-orthogonal multiple access, precoding, quality-of-service",

author = "Zhiyong Chen and Zhiguo Ding and Peng Xu and Xuchu Dai",

note = "Funding Information: Manuscript received March 8, 2016; revised March 30, 2016; accepted April 10, 2016. Date of publication April 21, 2016; date of current version June 8, 2016. This work was supported in part by the National Natural Science Foundation of China (No. 61471334) and the National High Technology Research and Development Program of China (863 Program) with Grant No. 2012AA01A502. The work of Z. Ding was supported by the Royal Society International Exchange Scheme and the UK EPSRC under grant number EP/N005597/1. The associate editor coordinating the review of this letter and approving it for publication was X. Zhou. Publisher Copyright: {\textcopyright} 1997-2012 IEEE.",

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doi = "10.1109/LCOMM.2016.2555907",

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N1 - Funding Information: Manuscript received March 8, 2016; revised March 30, 2016; accepted April 10, 2016. Date of publication April 21, 2016; date of current version June 8, 2016. This work was supported in part by the National Natural Science Foundation of China (No. 61471334) and the National High Technology Research and Development Program of China (863 Program) with Grant No. 2012AA01A502. The work of Z. Ding was supported by the Royal Society International Exchange Scheme and the UK EPSRC under grant number EP/N005597/1. The associate editor coordinating the review of this letter and approving it for publication was X. Zhou. Publisher Copyright: © 1997-2012 IEEE.

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N2 - In this letter, based on the non-orthogonal multiple access (NOMA) concept, a quality-of-service optimization problem for two-user multiple-input-single-output broadcast systems is considered, given a pair of target interference levels. The minimal power and the optimal precoding vectors are obtained by considering its Lagrange dual problem and via Newton's iterative algorithm, respectively. Moreover, the closed-form expressions of the minimal transmission power for some special cases are also derived. One of these cases is termed quasi-degraded, which is the key point and will be discussed in detail in this letter. Our analysis further figures out that the proposed NOMA scheme can approach nearly the same performance as optimal dirty paper coding, as verified by computer simulations.

AB - In this letter, based on the non-orthogonal multiple access (NOMA) concept, a quality-of-service optimization problem for two-user multiple-input-single-output broadcast systems is considered, given a pair of target interference levels. The minimal power and the optimal precoding vectors are obtained by considering its Lagrange dual problem and via Newton's iterative algorithm, respectively. Moreover, the closed-form expressions of the minimal transmission power for some special cases are also derived. One of these cases is termed quasi-degraded, which is the key point and will be discussed in detail in this letter. Our analysis further figures out that the proposed NOMA scheme can approach nearly the same performance as optimal dirty paper coding, as verified by computer simulations.

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Optimal Precoding for a QoS Optimization Problem in Two-User MISO-NOMA Downlink

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