Adaptive symbol set design method based on generalized spatial modulation

A generalized space modulation and design method technology, applied in free space transmission, electromagnetic wave transmission system, electromagnetic transmitter, etc., can solve problems such as system performance degradation, and achieve the effect of eliminating system performance degradation and good bit error rate performance

Active Publication Date: 2021-04-30
SOUTHEAST UNIV
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Problems solved by technology

However, the PAM modulation order of the activated LEDs in this scheme is the same, which is applicable to the situation where the channel conditions of the LEDs are similar. However, if the channel conditions of the LEDs are significantly different, this scheme will bring obvious system performance degradation

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  • Adaptive symbol set design method based on generalized spatial modulation
  • Adaptive symbol set design method based on generalized spatial modulation
  • Adaptive symbol set design method based on generalized spatial modulation

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[0036] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0037] An adaptive symbol set design method based on generalized spatial modulation. First, the initial total symbol set is obtained, and then an optimization model for maximizing the minimum distance between symbols is established. The optimization variable is the symbol set. Then the optimization model is solved by the adaptive iterative generalized space symbol set design method AICGSM. This method first initializes the optimal symbol set and the remaining symbol s...

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Abstract

The invention discloses a generalized spatial modulation-based adaptive symbol set design method, which comprises the following steps of: firstly, obtaining an initial total symbol set, then establishing an optimization model for maximizing the minimum distance between symbols, and taking an optimization variable as a symbol set, and employing AICGSM (Adaptive Iterative Generalized Space Symbol Set Design) method to solve optimization model. The method comprises the steps of firstly initializing an optimal symbol set and a residual symbol set, then adding symbols in the residual symbol set into the optimal symbol set at a time through iteration until the minimum distance of the optimal symbol set is maximum or the number of iterations meets a preset value, stopping iteration. According to the invention, the inter-channel interference in a general MIMO -VLC system can be reduced, and compared with a generalized spatial modulation symbol set design method with a fixed order, the method provided by the invention provides better bit error rate performance.

Description

technical field [0001] The invention relates to an adaptive symbol set design method based on generalized spatial modulation, which belongs to the field of visible light communication. Background technique [0002] Visible light communication (VLC) is a communication technology that transmits data by modulating visible light. Generally, light-emitting diodes (LEDs) are used to send data, and photodiodes (PDs) are used to receive data. But the bandwidth of LED is very narrow, which limits the data transmission rate, so MIMO technology is introduced in VLC. The introduction of MIMO technology improves the spectral efficiency of the system, but also brings interference between channels. When the LED interval or PD interval is close enough, the channel correlation will increase, and the inter-channel interference will also increase, which will seriously degrade the system performance. In order to eliminate inter-channel interference in the MIMO-VLC system, a generalized spati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/516H04B10/116H04B10/50
CPCH04B10/116H04B10/502H04B10/516
Inventor 蒋良成张庆贺陈明肖仁良
Owner SOUTHEAST UNIV
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