Adaptive modulation method based on generalized spatial modulation system

A generalized spatial modulation and adaptive modulation technology, applied in the field of MIMO technology, can solve problems such as BER performance loss

Inactive Publication Date: 2016-06-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0004] However, while the GSM system improves the spectral efficiency, it also has a large loss in BER performance, which limits the application of the system.

Method used

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  • Adaptive modulation method based on generalized spatial modulation system
  • Adaptive modulation method based on generalized spatial modulation system
  • Adaptive modulation method based on generalized spatial modulation system

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Embodiment Construction

[0021] The technical solution of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.

[0022] In order to better describe the present invention, the terms used in the technical solution of the present invention and the transmitter structure of the generalized spatial modulation system are introduced here.

[0023] Generalized Spatial Modulation: Schematic as image 3 , assuming that the GSM-MIMO system has N t root transmit antenna and N r Root receiving antennas, each time slot transmitting end only selects N p (N p t ) to transmit data symbols through the transmit antenna. Due to the N t Choose N among the root transmit antennas p The combination of root antennas has a total of , according to the bitmap rule, only need Antenna combinations are used for the mapping of information bits, Indicates rounding down. Therefore, similar to traditional spatial modulation, the information bits to be tra...

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Abstract

The invention belongs to the technical field of communication anti-jamming, relates to a generalized spatial modulation (SM) technology, a quadrature amplitude modulation (QAM) technology, and a relevant MIMO (Multiple Input Multiple Output) technology, and provides an adaptive modulation method based on a generalized spatial modulation system. An optimal modulation way combination is selected to transmit signals, so that a minimum Euclidean distance between constellation points can be increased, and the BER (Bit Error Rate) performance of the system is improved remarkably under the conditions of introducing a relatively small feedback quantity and increasing relatively low complexity.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, and relates to generalized spatial modulation (Generalized Spatial Modulation, SM) technology, quadrature amplitude (Quadrature Amplitude Modulation, QAM) modulation technology, and related MIMO (Multiple Input Multiple Output) technology. Background technique [0002] MIMO modulation technology is a high-speed transmission technology in a wireless environment. It configures more antenna units at the transmitting end and / or receiving end, and combines advanced space-time coding modulation schemes. By making full use of the degree of freedom of space, it can Brings additional diversity, multiplexing and beamforming gains. [0003] Recently, SM technology has been proposed as a new modulation technique as a new MIMO modulation scheme. The basic principle of this technology is to transmit information bits by activating different antennas and using the antenna index value for modu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04L1/06H04L27/34
CPCH04B7/0452H04B7/0413H04L1/06H04L1/203H04L27/3483
Inventor 王宇王金福肖悦李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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