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MU-MISO visible light communication system zero-forcing pre-coding matrix determining method

A visible light communication and zero-forcing precoding technology, which is applied in the field of wireless optical communication, can solve problems such as inability to ensure system performance, and achieve the effect of optimal system performance and significant bandwidth utilization gain

Active Publication Date: 2016-03-23
SOUTHEAST UNIV
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Problems solved by technology

The traditional zero-forcing scheme adopts the channel pseudo-inverse form, but for the MU-MISO system where the optical power of each emitted LED is limited, this scheme cannot ensure the optimal system performance

Method used

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  • MU-MISO visible light communication system zero-forcing pre-coding matrix determining method
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  • MU-MISO visible light communication system zero-forcing pre-coding matrix determining method

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Embodiment Construction

[0029] 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.

[0030] A method for determining the zero-forcing precoding matrix of a MU-MISO visible light communication system, such as figure 1 shown, including the following steps:

[0031] Step 1, the bit error parameter η determined according to the bit error rate required by the MU-MISO visible light communication system;

[0032] The error parameter n is:

[0033] η = ( - l ...

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Abstract

The present invention discloses a MU-MISO visible light communication system zero-forcing pre-coding matrix determining method. An error code parameter is determined according to the error code rate needed by an MU-MISO visible light communication system, then according to the error code parameter, the equivalent channel gain of the kth user of the MU-MISO visible light communication system, the standard difference of kth user receiver noise, a channel matrix, the maximum transmitting optical power of an LED, and a corresponding constraint condition, the optimization solution of a target function is carried out, an optimal zero-forcing pre-coding matrix W is obtained, and compared with a traditional zero-forcing pre-coding scheme based on channel pseudo inverse, a significant bandwidth utilization rate gain can be obtained in the scene that each emitting LED light power is limited.

Description

technical field [0001] The invention relates to the technical field of wireless optical communication, in particular to a method for calculating a zero-forcing precoding matrix of an MU-MISO visible light communication system. Background technique [0002] In recent years, visible light communication technology has become a research hotspot in communication academia and industry. This technology can realize lighting and wireless communication functions at the same time, and has the advantages of high transmission data rate, strong confidentiality, no need for spectrum certification, and no electromagnetic interference. It is a key technology with great potential in future wireless communication systems. [0003] The characteristic of the MISO system is that the transmitting end is equipped with multiple antennas, while the receiving end is equipped with a single antenna. If all antennas send the same signal, since the antennas are located in different positions, these signa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/116
CPCH04B10/116H04B10/5055
Inventor 沈弘邓榆钦赵春明
Owner SOUTHEAST UNIV
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