A method for eliminating interference between terminals in a same-frequency simultaneous full-duplex system based on transmit beamforming
A technology of same-frequency simultaneous and system terminal, applied in transmission system, space transmit diversity, duplex signal operation, etc., can solve the problem that wireless communication signals cannot be separated, and achieve the effect of improving communication efficiency and eliminating interference
Active Publication Date: 2020-06-26
北京大学(天津滨海)新一代信息技术研究院
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Currently, wireless communication signal detection and nonlinear processing cannot separate the two signals.
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[0018] A terminal communication node is equipped with more than two antennas, the terminal works in half-duplex mode, and the base station node works in full-duplex mode. Taking two terminals B1 and B2 as an example, the B1 terminal will transmit training sequences to the surroundings, and the adjacent B2 terminal After receiving the training sequence of the terminal B1, such as figure 1 As shown, the terminal first performs signal detection. The purpose of signal detection is to determine the signal type, whether it belongs to the base station signal or the B1 interference signal, and then uses the multi-antenna beamforming algorithm to form the transmit beam zero point of the antenna pattern for the interference terminal B1. The main lobe is aligned with the direction of the base station, so that when terminal B2 communicates with the base station, it can reduce interference to B1 and improve communication effectiveness. Such as figure 2 As shown, the beamforming algorithm...
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The invention relates to a method for eliminating interference between mobile phones by using multi-antenna technology in a co-frequency co-time full-duplex communication system. Among the involved communication nodes, a base station operates in a full-duplex state and mobile phones operate in a half-duplex state. Each mobile phone is equipped with more than two antennas, first, the mobile phone receives a training sequence sent by a surrounding mobile phone, according to signal detection, the directions of signals from the interfering mobile phone and the base station are distinguished, and then, the beam forming principle of the antenna is used to align the beam zero point to the interfering mobile phone and the beam maximum direction to the base station. In this way, when the mobile phone performs uplink communication, the interference to the surrounding downlink communication mobile phone can be reduced and the communication efficiency is improved.
Description
technical field [0001] The present invention relates to a same-frequency simultaneous full-duplex system, a method for combining multi-antenna technology and inter-terminal interference elimination, in particular to a multi-antenna-based method for inter-terminal interference elimination in a same-frequency simultaneous full-duplex system and The system belongs to the field of wireless communication. Background technique [0002] A basic task of the wireless communication system is to realize the information exchange between two communication nodes (A1 and A2), and the transmission of information is divided into two directions: (1) from A1 to A2 and (2) from A2 to A1. If a communication node uses two antennas, one as a transmitting antenna and the other as a receiving antenna, and the communication node cancels the signal from its own transmitting antenna in the receiving antenna signal, two-way communication can be realized in the same frequency and the same time slot . T...
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IPC IPC(8): H04B7/06H04B7/08H04L5/14H04L5/16
CPCH04B7/0408H04B7/0617H04L5/14H04L5/16
Inventor 焦秉立段晓辉马猛史亚博
Owner 北京大学(天津滨海)新一代信息技术研究院