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Dynamic interference guiding method

A directional and dynamic technology, applied in the field of communication, which can solve the problems of reducing the achievable data rate, excessive power overhead of the interference management method, and reducing the power of the desired signal, so as to maximize the spectral efficiency, realize the rational utilization, and eliminate the interference effect.

Active Publication Date: 2016-10-12
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a dynamic interference steering method, which aims to solve the problem that the power overhead of the interference management method is too large to reduce the power used to transmit the desired signal, thereby reducing the achievable data rate.

Method used

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Embodiment 1

[0035]With the rapid development of wireless communication technology, people's demand for data transmission continues to increase, and there will be a large number of users and data connections in a limited area. On the one hand, people strive to find efficient resource utilization methods, on the other hand, they also realize that interference has become an important factor restricting the improvement of network performance. Therefore, the importance of interference management techniques has become increasingly prominent. Many interference management methods have been proposed so far, but none of the existing interference management methods considers the power overhead of interference management. Under the condition that the transmission power of the transmitter is limited, the power overhead for interference management will also reduce the power used to transmit the desired signal while implementing interference suppression. Therefore, an effective interference management ...

Embodiment 2

[0054] A kind of dynamic interference steering method is the same as embodiment 1, and in step (3), the target communication transmitter calculates the interference steering signal precoding vector, including the following steps:

[0055] (3a) The target communication transmitter calculates the direction of the desired signal and the direction of the signal synthesized from the original interfering signal and the guiding signal And the original interference signal is required to be directed to the direction orthogonal to the desired signal, which satisfies the condition Among them, H 0 Indicates the channel matrix between target communication pairs, H 10 Indicates the channel matrix between the interfering communication transmitter and the target communication receiver, p 0 Indicates the target communication transmitter pair x 0 The precoding vector of p 1 Indicates the target communication transmitter pair x 1 The precoding vector of p IS Indicates the precoding vec...

Embodiment 3

[0060] A kind of dynamic interference steering method is the same as embodiment 1-2, in step (4), the target communication transmitter calculates the best dynamic interference steering coefficient ρ * , to achieve the best compromise between the power overhead required for interference steering and residual interference, including the following steps:

[0061] (4a) The target communication transmitter calculates the spatial feature PH of the target communication filter vector and the projection component of the interference signal in the direction of the desired signal 10 p 1 Spatial correlation between in Denotes the target communication receiver pair x 0 Conjugate transpose of the filter vector.

[0062] (4b) The target communication transmitter transmits power P according to the target communication transmitter 0 Calculate the upper limit of the value range of the interference steering coefficient, that is, the maximum value

[0063] ρ max Subject to the transmit...

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Abstract

This invention discloses a dynamic interference guiding method, and mainly solves the problem that the data rate of a user is reduced due to overlarge power expense in the interference management method. The method comprises the following steps: channel state and data information among transmitters are shared; a target communication pair and an interference communication pair design a respective precoding vector and a filtering vector; a target communication transmitter calculates the precoding vector of the interference guiding signal, so that the direction of projection component of the interference guiding signal is opposite to the direction of projection component of the interference signal in the direction of an expected signal; and then, the optimal dynamic interference guiding coefficient is calculated; the interference guiding power expense and the residual interference are compromised; hereby, the dynamic interference guiding signal is constructed; the dynamic interference guiding signal and the expected signal are sent to the target communication receiver to realize interference dynamic guiding; and at last, the receiver restores expected data. Through reasonably distributing the transmitting power of the transmitter corresponding to the interfered receiver, the spectrum efficiency of the interfered receiver is maximized, and the method is used for transmitting data when the receiver is interfered.

Description

technical field [0001] The invention belongs to the technical field of communication, and further mainly relates to an interference steering method, in particular to a dynamic interference steering method. It can be used in wireless communication network systems such as hybrid cellular networks and enterprise networks. Background technique [0002] With the rapid development of wireless communication technology, people's demand for data transmission continues to increase, and there will be a large number of users and data connections in a limited area. On the one hand, people strive to find efficient resource utilization methods, on the other hand, they also realize that interference has become an important factor restricting the improvement of network performance. Therefore, the importance of interference management techniques has become increasingly prominent. [0003] Existing interference management methods include Zero-forcing Beamforming (ZFBF), Zero-forcing receptio...

Claims

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Application Information

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IPC IPC(8): H04W52/02H04W52/24H04B7/04
CPCH04B7/0456H04W52/0206H04W52/244Y02D30/70
Inventor 李钊郭风娟舒灿宇肖丽媛丁汉清姚俊良马骁韩维佳
Owner XIDIAN UNIV
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