Patent
Interference alignment method based on two-layer pre-coding structure in MIMO-IBC system
Jing Xiaorong,Zhao Yuefang,Zhang Zufan,Chen Qianbin +3 more
- 17 Sep 2014
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TL;DR: In this article, an interference alignment method based on a two-layer pre-coding structure was proposed for a multiple input multiple output-interference broadcast channel (MIMO-IBC) system.
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Abstract: The invention belongs to the technical field of communication, and discloses an interference alignment method based on a two-layer pre-coding structure and suitable for a multiple input multiple output-interference broadcast channel (MIMO-IBC) system. In the MIMO-IBC system, interference among communities and interference among users are main factors for limiting channel capacity. The method includes the steps of firstly, aligning ICI signals through base station outer layer pre-coding, eliminating the ICI signals through a receiving matrix, and finally eliminating IUI signals through base station inner layer pre-coding. According to the method, when the number of antennas of a base station meets the condition, the ICI signals can be aligned in a low-dimensional interference signal sub-space through closed solution, and otherwise, the ICI signals are aligned in or gets close to the low-dimensional interference signal sub-space through loop iteration. By means of the method, the ICI signals and the IUI signals can be effectively eliminated, the system capacity can be remarkably improved; the zero-forcing technology can be adopted at a receiving end, and therefore receiving is simplified, and meanwhile the requirement for the number of antennas at the receiving end is low.
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Citations
Patent
Opportunity interference alignment-based method for data transmission in cellular downlink channel
Li Zhaoyu,Ye Zonggang,Zhao Yingzhi,Liu Yuanhang,Huang Xiang +4 more
- 26 Oct 2016
TL;DR: In this article, the authors proposed an opportunity interference alignment-based method for data transmission in a cellular downlink channel, which comprises the following steps: a base station broadcasts S (M*1)-dimensional signal subspaces to all users in a cell, M is the number of antennas of a transmitting end, and a user side designs a reception decoding matrix according to a rule of using a vector orthogonal with an interference vector as far as possible and feeds an interference leakage value back.
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Patent
Topological interference alignment method of MIMO interference broadcast channel
Liu Wei,Chen Dan,Li Jiandong,Liu Qin,Huang Pengyu +4 more
- 10 May 2017
TL;DR: In this paper, a topological interference alignment method of an MIMO interference broadcast channel was proposed for solving the technical problem that the topology interference alignment of generalized MIMOs cannot be realized in the prior art.
4
Patent
User group selection method based on angle information under Massive-MIMO
Wan Chen,Wang Desheng,Xia Pengmin,Liu Wenxu +3 more
- 13 Jul 2016
TL;DR: In this article, a user group selection method based on angle information under massive-MIMO was proposed, which takes into consideration both interference between user groups and fair scheduling of user groups, avoiding complex operations such as processing medium and high-dimension matrix subspace segmentation and projection through direct use of channel correlation information.
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•Proceedings Article
Distributed Interference Alignment in Cellular Systems: Analysis and Algorithms
Jan Schreck,Gerhard Wunder +1 more
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TL;DR: Algorithms, which are based on alternating the optimization of the receive filters and transmit precoders, are proposed and shown to achieve the optimal degrees of freedom under certain conditions.
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Patent
Apparatus and method for signal detection in multiple input multiple output wireless communication system
Ji-Hoon Cho,Ko Kyun Byoung,Jo Sung Kwon,Jae-Hyok Lee +3 more
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TL;DR: In this paper, a multiple-input multiple-output (MIMO) wireless communication system is presented, which includes an estimator for estimating a channel between a plurality of Transmit (Tx) antennas of a transmitting end and a pluralityof Receive (Rx) antennas from a receiving end.
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Patent
Design method for two-level precodes of cognitive MIMO communication system
Li Li,Zhang Huijie,Zhou Xiaoping,Yang Jingwen +3 more
- 07 May 2014
TL;DR: In this paper, a design method for two-level precodes of a cognitive MIMO communication system is presented, under the condition that the interference, on the main user, of the cognitive user is reduced.
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Patent
Interference elimination method based on effective channel parameter semi-orthogonal
Desheng Wang,Wendi Cheng,Hongzhi Lin,Yingzhuang Liu,Wei Lv,Yang Yifan,Fei Qi,Tian Keliang,Bo Yang +8 more
- 04 Jul 2012
TL;DR: In this paper, an interference elimination method based on effective channel parameter semi-orthogonal, comprising the steps of calculating an effective receiving channel parameter of a user side and regarding the parameter as the basis for the selection of a semiorogonal user by a base station according to effective channels and cross channel parameters fed back by a user, was proposed.
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