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Co-frequency co-time full duplex communication system and method based on spatial modulation

A simultaneous and spatial modulation technology of the same frequency, applied in duplex signal operation, transmission system, digital transmission system, etc., can solve the problem that spectrum resources are not fully utilized

Active Publication Date: 2020-07-07
PEKING UNIV
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Problems solved by technology

[0003] In existing wireless communication systems, it is generally considered that the same wireless device (such as a base station and a mobile terminal) cannot transmit and receive signals on the same frequency band at the same time, so the wireless device can only work in half-duplex mode, which makes spectrum resources underutilized

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  • Co-frequency co-time full duplex communication system and method based on spatial modulation

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Embodiment Construction

[0036] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0037] like figure 1 As shown, the same-frequency simultaneous full-duplex communication system based on spatial modulation in this embodiment includes a plurality of communication nodes, and each communication node transmits and receives information at the same frequency and time; the i-th communication node includes: Source, serial-to-parallel conversion unit, antenna selection unit, constellation modulation unit, space modulation precoding unit, N i root antenna, maximum likelihood detection unit, transmit vector demodulation unit and information combination unit; wherein, the source is connected to the serial-to-parallel conversion unit; the serial-to-parallel conversion unit is respectively connected to the antenna selection unit and the constellation modulation unit; the antenna selection unit and the constellation The modulation un...

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Abstract

The invention discloses a co-frequency co-time full duplex communication system and method based on spatial modulation. According to the invention, a sending information flow is divided into an antenna selection information flow and a constellation modulation information flow by using the spatial modulation technology, the antenna selection information transmits one part of sending information, and the emission symbol obtained after constellation modulation transmits the other part of sending information, so that the spatial multiplexing gain of the communication system is improved; a precoding vector is obtained through a self-interference channel matrix, a transmitting symbol is multiplied by the precoding vector, and is eliminated on a receiving antenna, so that the part of antennas canbe used for receiving same-frequency simultaneous signals from another communication node, and a same-frequency simultaneous full duplex communication mode is realized; and the combination of the twomeans improves the spectral efficiency of the communication system.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a same-frequency simultaneous full-duplex communication system and a communication method based on space modulation. Background technique [0002] A basic task of a wireless communication system is to realize 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 , This communication method is called simultaneous full-duplex at the same frequency. [0003] In existing wireless communication systems, it is generally considered that the same wir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/06H04B7/08H04L5/14
CPCH04B7/0456H04B7/0602H04B7/0802H04L5/14H04L5/143
Inventor 马猛王忠龙魏来
Owner PEKING UNIV
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