Patent
MIMO (multiple input multiple output) interference alignment algorithm based on Stiefel manifold upper conjugate gradient method
Li Jiandong,Dong Quan,Zhao Linjing,Chen Rui,Yan Jilei,Li Zhao,Huang Jinjing,Wei Liu,Sheng Min,Li Hongyan +9 more
- 31 Dec 2014
3
TL;DR: In this article, an MIMO interference alignment algorithm based on a Stiefel manifold upper conjugate gradient method is proposed to solve the problem that traditional interference alignment method cannot well improve the overall rate of a network.
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Abstract: The invention discloses an MIMO (multiple input multiple output) interference alignment algorithm based on a Stiefel manifold upper conjugate gradient method, mainly aiming at solving the problem that the traditional interference alignment method cannot well improve the overall rate of a network. The method concretely comprises the steps of (1) initializing a precoding matrix Vl (l=1, L, K) at a user transmission terminal; (2) building an optimal object with the maximal speed; (3) working out decoding matrix Uk (k=1, L, K); (4) after the decoding matrix Uk is obtained, acquiring the precoding matrix Vl; (5) enabling the steps (3) and (4) to be carried out in a circulating way till convergence or maximum iterations. After the MIMO interference alignment algorithm is used, the overall rate of the network can be better improved; the MIMO interference alignment algorithm is used for the interference alignment coding design of users in the MIMO network environment, and can also be used for the precoding design for inhibiting the interference of the master user and the secondary user in cognitive radio.
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Citations
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TL;DR: In this article, a low-complexity precoding method, combining a conjugate gradient method and a Jacobi iterative method, was proposed for a large-scale multi-antenna system, and belongs to the technical field of wireless communication.
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- 05 Oct 2017
TL;DR: In this article, a cognitive network receiving terminal decoding method is proposed for use in a user control device of a user signal transmission device, where the device determines a target decoding matrix of a main user on the basis of transmission power, the number of sending signals, a channel matrix, and noise power, and using a maximum signal to interference plus noise ratio algorithm, determining a target pre-coding matrix of an SUs on a secondary SUs.
References
Subspace optimisation-based iterative interference alignment algorithm on the grassmann manifold
TL;DR: An iterative interference alignment (IA) algorithm for the multi-user multi-input multi-output interference channel is proposed, which optimises on the Grassmann manifold to improve the performance of conventional interference subspace (ISS) alignment algorithm without the assumption of channel reciprocity.
8
Patent
Interference alignment precoding method based on Stiefel manifold
Chen Zhang,Huarui Yin,Guo Wei +2 more
- 03 Oct 2012
TL;DR: In this paper, an interference alignment precoding method for transmitter unilateral optimization based on a Stiefel manifold is proposed, which is characterized in that the interference intensity in a minimum space signal is taken as an objective function, the objective function is reconfigured on the STF and an orthogonality constraint is removed.
6
Interference alignment with hybrid optimization and receiver cooperation
Jhanak Parajuli,Giuseppe Abreu +1 more
- 16 Jun 2013
TL;DR: Simulation results show that the proposed algorithm with receiver cooperation and hybrid optimization outperforms the well known distributed interference alignment scheme proposed by Gomadam et al.
2
Interference alignment in cognitive radio networks
Fatemeh Rezaei,Aliakbar Tadaion +1 more
TL;DR: The proposed iterative algorithm is an improved version of minimum weighted leakage interference algorithm with a much faster convergence rate and the analytical results are confirmed through simulations.