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A Generalized Space Time Shift Keying Modulation Method Based on the Cyclic Structure of Identity Matrix

A technology of cyclic structure and modulation method, which is applied in the direction of digital transmission system, electrical components, and error prevention, etc., to achieve the effects of reduced decoding complexity, reduced design complexity, and high spectral efficiency

Inactive Publication Date: 2017-10-20
XI AN JIAOTONG UNIV
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Problems solved by technology

Unfortunately, the SM-OSTBC method is only suitable for MIMO systems with an even number of transmitting antennas and RF links, and at least 4 RF links must be configured at the transmitting end

Method used

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  • A Generalized Space Time Shift Keying Modulation Method Based on the Cyclic Structure of Identity Matrix
  • A Generalized Space Time Shift Keying Modulation Method Based on the Cyclic Structure of Identity Matrix
  • A Generalized Space Time Shift Keying Modulation Method Based on the Cyclic Structure of Identity Matrix

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0023] see figure 1 , both conventional M-PSK / QAM and activated scattering matrices can be used to transmit information bits. The invention utilizes unit matrix to move circularly in the matrix to construct the scattering matrix. Firstly, the scattering matrix of the GSTSK-CI scheme can be designed simply and systematically, and does not require angle optimization and computer optimal search; secondly, the GSTSK-CI scheme is suitable for any situation where the number of transmitting antennas is greater than 2, and it is better than the existing solution, the present invention can achieve higher spectral efficiency, especially in each transmission interval, when P is activated from Q scattering matrices, when When the value of is larger, the spectral efficiency is higher; finally, the complexity of the maximum likelihood decoding detection algorithm at the receivin...

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Abstract

The invention discloses a generalized space-time-shift keying modulation method based on a unit matrix loop structure. Information transmission is carried out by spatial modulation (SM) and space shift keying (SSK) by means of spatial dimensions, and extra frequency spectrum efficiency can be obtained compared with a traditional MIMO scheme. According to the modulation method, a unit matrix moves in a loop mode inside a scattering matrix, and no auxiliary computer search needs to be carried out on the scattering matrix; the GSTSK-CI method is applicable to any MIMO system with the number of transmitting antennas larger than 2, and transmit diversity can be obtained except for two special conditions; meanwhile, the GSTSK-CI method has the lower decoding complexity compared with a traditional GSTSK scheme, and has higher spectral efficiency compared with an SM-OSTB scheme on the condition that the numbers of transmitting antennas are the same; the simulation result verifies theoretical analysis and indicates that the GSTSK-CI method is better than the GSTSK scheme and the SM-OSTBC scheme.

Description

technical field [0001] The invention belongs to the technical field of multi-antenna wireless communication, and relates to a transmit diversity transmission technology in a multi-antenna wireless communication system, in particular to a generalized space-time shift keying modulation method based on a unit array cyclic structure. Background technique [0002] Spatial Modulation (Spatial Modulation, SM) and Space Shift Keying (Space Shift Keying, SSK) use spatial dimensions to transmit information, and can obtain additional spectral efficiency compared with traditional MIMO schemes. Therefore, in recent years, SM and SSK have received extensive attention as a novel MIMO transmission technology. However, SM and SSK only activate one antenna per transmission, so they cannot achieve transmit diversity and can only rely on receive diversity to combat channel fading. [0003] In order to overcome the defect that SM and SSK cannot obtain transmit diversity, various methods have be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34
CPCH04L1/0612H04L1/0625
Inventor 王磊陈诚陈志刚
Owner XI AN JIAOTONG UNIV
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