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Orthogonal index modulation method based on diagonal space-frequency codes

An index modulation and space-frequency technology, applied in radio transmission systems, digital transmission systems, electrical components, etc., can solve the problems of increasing the processing complexity of the sending end and receiving end, and achieve the effect of good bit error performance

Active Publication Date: 2021-05-07
XI AN JIAOTONG UNIV
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Problems solved by technology

An obvious feature of the MIMO system is that it has extremely high spectrum utilization efficiency. On the basis of making full use of existing spectrum resources, space resources are used to obtain gains in reliability and effectiveness, but the cost is to increase the cost of transmission. The processing complexity of the receiving end
To a certain extent, the MIMO system can use the multipath components in the propagation process to resist multipath fading, but for the frequency selective fading, the MIMO system is still powerless

Method used

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  • Orthogonal index modulation method based on diagonal space-frequency codes
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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0039] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art w...

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Abstract

The invention discloses an orthogonal index modulation method based on diagonal space-frequency codes. The diagonal space-frequency codes are used as a sending signal matrix. According to the invention, firstly, two modulation symbols are associated through a Hadamard matrix and a rotation matrix to construct a diagonal code, in addition, index numbers in a space-frequency resource block (RB) are independently selected twice, and different space-frequency units are utilized to modulate and construct homodromous and orthogonal components of the diagonal code to obtain a DSFC-QIM sending signal matrix. According to the invention, DSFC-QIM code word design is carried out on each resource block, so that second-order transmit diversity can be obtained. Simulation results show that under independent and related Rayleigh channels, the method provided by the invention obtains better bit error rate performance than the existing QSFIM scheme.

Description

technical field [0001] The invention belongs to the technical field of transmit diversity transmission in a multi-antenna wireless communication system, and relates to an orthogonal index modulation method based on a diagonal space-frequency code. Background technique [0002] Multiple-input multiple-output (MIMO) technology is one of the key technologies to improve the system capacity and reliability of wireless communication networks. Because it uses multiple antennas at both the transmitting end and the receiving end, it forms an antenna system with multiple channels between the transceivers. , thus greatly improving the channel capacity. An obvious feature of the MIMO system is that it has extremely high spectrum utilization efficiency. On the basis of making full use of existing spectrum resources, space resources are used to obtain gains in reliability and effectiveness, but the cost is to increase the cost of transmission. processing complexity at the receiving end. ...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04L5/00
CPCH04B7/0456H04L5/0023H04L5/006
Inventor 王磊聂高阳
Owner XI AN JIAOTONG UNIV
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