Degrees of freedom of MIMO interference channel with distributed space-time interference alignment
In the context of K-user MIMO interference channel (IC),achievable degrees of freedom (DoF) were investigated with distributed space-time interference alignment (DSTIA).By precoding with distributed current and outdated channel state information at the transmitters (CSIT),new tradeoff regions betwee...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2018-01-01
|
| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2018017/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841539452408692736 |
|---|---|
| author | Tengda YING Wenjiang FENG Weiheng JIANG Guoling LIU Chunan YAO Taotao BAO |
| author_facet | Tengda YING Wenjiang FENG Weiheng JIANG Guoling LIU Chunan YAO Taotao BAO |
| author_sort | Tengda YING |
| collection | DOAJ |
| description | In the context of K-user MIMO interference channel (IC),achievable degrees of freedom (DoF) were investigated with distributed space-time interference alignment (DSTIA).By precoding with distributed current and outdated channel state information at the transmitters (CSIT),new tradeoff regions between achievable DoF and CSI feedback delay/frequency were achieved for MISO system.The impact of the number of transmit antennas on achievable DoF in the MISO system was analyzed,revealing that DoF results approach to the outer bound as the number of transmit antennas increases.Further,the impact of the number of receive antennas on achievable DoF was characterized,deriving the range of CSI feedback delay that preserves achievable DoF in the MIMO system.Theoretical and numerical analyses show that,the proposed DSTIA scheme can achieve better sum-DoFs by eliminating inter-user interference perfectly,tighten the gap between achievable DoF and outer bound,as well as improve the achievable rate of the system. |
| format | Article |
| id | doaj-art-b6d09bcb742a4e5ba80a82eeff7896d0 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2018-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-b6d09bcb742a4e5ba80a82eeff7896d02025-01-14T07:14:09ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2018-01-013913714659716124Degrees of freedom of MIMO interference channel with distributed space-time interference alignmentTengda YINGWenjiang FENGWeiheng JIANGGuoling LIUChunan YAOTaotao BAOIn the context of K-user MIMO interference channel (IC),achievable degrees of freedom (DoF) were investigated with distributed space-time interference alignment (DSTIA).By precoding with distributed current and outdated channel state information at the transmitters (CSIT),new tradeoff regions between achievable DoF and CSI feedback delay/frequency were achieved for MISO system.The impact of the number of transmit antennas on achievable DoF in the MISO system was analyzed,revealing that DoF results approach to the outer bound as the number of transmit antennas increases.Further,the impact of the number of receive antennas on achievable DoF was characterized,deriving the range of CSI feedback delay that preserves achievable DoF in the MIMO system.Theoretical and numerical analyses show that,the proposed DSTIA scheme can achieve better sum-DoFs by eliminating inter-user interference perfectly,tighten the gap between achievable DoF and outer bound,as well as improve the achievable rate of the system.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2018017/degree of freedomdistributed space-time interference alignmentMIMO interference channellimited CSI feedback |
| spellingShingle | Tengda YING Wenjiang FENG Weiheng JIANG Guoling LIU Chunan YAO Taotao BAO Degrees of freedom of MIMO interference channel with distributed space-time interference alignment Tongxin xuebao degree of freedom distributed space-time interference alignment MIMO interference channel limited CSI feedback |
| title | Degrees of freedom of MIMO interference channel with distributed space-time interference alignment |
| title_full | Degrees of freedom of MIMO interference channel with distributed space-time interference alignment |
| title_fullStr | Degrees of freedom of MIMO interference channel with distributed space-time interference alignment |
| title_full_unstemmed | Degrees of freedom of MIMO interference channel with distributed space-time interference alignment |
| title_short | Degrees of freedom of MIMO interference channel with distributed space-time interference alignment |
| title_sort | degrees of freedom of mimo interference channel with distributed space time interference alignment |
| topic | degree of freedom distributed space-time interference alignment MIMO interference channel limited CSI feedback |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2018017/ |
| work_keys_str_mv | AT tengdaying degreesoffreedomofmimointerferencechannelwithdistributedspacetimeinterferencealignment AT wenjiangfeng degreesoffreedomofmimointerferencechannelwithdistributedspacetimeinterferencealignment AT weihengjiang degreesoffreedomofmimointerferencechannelwithdistributedspacetimeinterferencealignment AT guolingliu degreesoffreedomofmimointerferencechannelwithdistributedspacetimeinterferencealignment AT chunanyao degreesoffreedomofmimointerferencechannelwithdistributedspacetimeinterferencealignment AT taotaobao degreesoffreedomofmimointerferencechannelwithdistributedspacetimeinterferencealignment |