Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels
As we know, the degree of freedom approximates the capacity of a network. To improve the achievable degree of freedom in the K -user interference network, we propose a rank minimization interference minimization algorithm. Unlike the existing methods concentrating on the promotion of degree of freed...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Distributed Sensor Networks |
| Online Access: | https://doi.org/10.1177/1550147716686351 |
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| _version_ | 1849412082033754112 |
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| author | Yi-bing Li Xue-ying Diao Qian-hui Dong |
| author_facet | Yi-bing Li Xue-ying Diao Qian-hui Dong |
| author_sort | Yi-bing Li |
| collection | DOAJ |
| description | As we know, the degree of freedom approximates the capacity of a network. To improve the achievable degree of freedom in the K -user interference network, we propose a rank minimization interference minimization algorithm. Unlike the existing methods concentrating on the promotion of degree of freedom, our rank optimization method works directly with the interference matrix rather than its projection using the receive beamformers. Moreover, we put the trace constraint of the square root of desired matrix into the rank optimization to prevent the received signal-to-interference-plus-noise ratio from reduction. The decoders are designed through a weight interference leakage minimization method. Considering that the practical obtainable signal-to-noise ratio may be limited, we improve the design of decoders in rank minimization interference minimization, and propose the rank minimization rate maximization. Rank minimization rate maximization aims to reduce the impact of interference on undesired users as much as possible while improving the desired data rate. Simulation results show that rank minimization interference minimization algorithm can provide more interference-free dimensions for desired signals than other rank minimization methods. Rank minimization rate maximization outperforms rank minimization interference minimization at low-to-moderate signal-to-noise ratios, and its performance gets closer to rank minimization interference minimization with the increase in signal-to-noise ratio. Furthermore, in an improper system, rank minimization rate maximization still performs well. |
| format | Article |
| id | doaj-art-5ec24e272e314d0c8e8e7abf18e46d4a |
| institution | Kabale University |
| issn | 1550-1477 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Distributed Sensor Networks |
| spelling | doaj-art-5ec24e272e314d0c8e8e7abf18e46d4a2025-08-20T03:34:33ZengWileyInternational Journal of Distributed Sensor Networks1550-14772017-01-011310.1177/1550147716686351Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channelsYi-bing LiXue-ying DiaoQian-hui DongAs we know, the degree of freedom approximates the capacity of a network. To improve the achievable degree of freedom in the K -user interference network, we propose a rank minimization interference minimization algorithm. Unlike the existing methods concentrating on the promotion of degree of freedom, our rank optimization method works directly with the interference matrix rather than its projection using the receive beamformers. Moreover, we put the trace constraint of the square root of desired matrix into the rank optimization to prevent the received signal-to-interference-plus-noise ratio from reduction. The decoders are designed through a weight interference leakage minimization method. Considering that the practical obtainable signal-to-noise ratio may be limited, we improve the design of decoders in rank minimization interference minimization, and propose the rank minimization rate maximization. Rank minimization rate maximization aims to reduce the impact of interference on undesired users as much as possible while improving the desired data rate. Simulation results show that rank minimization interference minimization algorithm can provide more interference-free dimensions for desired signals than other rank minimization methods. Rank minimization rate maximization outperforms rank minimization interference minimization at low-to-moderate signal-to-noise ratios, and its performance gets closer to rank minimization interference minimization with the increase in signal-to-noise ratio. Furthermore, in an improper system, rank minimization rate maximization still performs well.https://doi.org/10.1177/1550147716686351 |
| spellingShingle | Yi-bing Li Xue-ying Diao Qian-hui Dong Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels International Journal of Distributed Sensor Networks |
| title | Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels |
| title_full | Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels |
| title_fullStr | Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels |
| title_full_unstemmed | Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels |
| title_short | Spatial–degree of freedom improvement of interference alignment in multi-input, multi-output interference channels |
| title_sort | spatial degree of freedom improvement of interference alignment in multi input multi output interference channels |
| url | https://doi.org/10.1177/1550147716686351 |
| work_keys_str_mv | AT yibingli spatialdegreeoffreedomimprovementofinterferencealignmentinmultiinputmultioutputinterferencechannels AT xueyingdiao spatialdegreeoffreedomimprovementofinterferencealignmentinmultiinputmultioutputinterferencechannels AT qianhuidong spatialdegreeoffreedomimprovementofinterferencealignmentinmultiinputmultioutputinterferencechannels |