A Method for Optimizing Downlink Coverage Uniformity of Indoor Visible Light Communication System

A technology of coverage uniformity and visible light communication, applied in the field of optical communication
CN108365891BActive Publication Date: 2020-09-01CHONGQING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV OF POSTS & TELECOMM
Publication Date
2020-09-01

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Abstract

The invention relates to a downlink coverage uniformity optimization method for an indoor visible light communication system, belonging to the technical field of optical communication. The method of the invention includes the following steps: searching a set of optimal power adjustment factors by adopting an improved genetic simulated annealing algorithm, and adjusting the transmitting power of anindoor LED array to ensure that the distribution of the receiving optical power on a receiving plane is more uniform; based on receiving optical power information of all receiving points on the receiving plane, designing a fitness function to serve as a basis for selecting an individual power adjustment factor; dividing a population into two sub-populations in an algorithm flow, and separately performing crossover operations and mutation operations on the two sub-populations; and designing an adaptive mutation probability formula according to the information whether the optimal individual inthe population changes. According to the scheme of the invention, the uniformity of downlink optical power distribution of the indoor visible light communication system can be effectively improved, the difference of the receiving optical power at different locations on the receiving plane can be reduced, and the fairness of system lighting and communication can be improved.
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Description

technical field

[0001] The invention belongs to the technical field of optical communication, and relates to a method for optimizing downlink coverage uniformity of an indoor visible light communication system. Background technique

[0002] Compared with traditional radio frequency (Radio Frequency, RF) communication, indoor visible light communication based on light emitting diode (LED, light emitting diode) has the advantages of low power consumption, high security, no electromagnetic interference, large available bandwidth and no certification, etc. application development prospects. In practical application scenarios, visible light communication systems usually need to arrange multiple LED arrays to achieve lighting and high-density, high-speed data transmission needs. However, the inherent Lambertian radiation model of the LED and the multipath effect of the channel will cause uneven distribution of received optical power and illumination intensity on the receiving pla...

Claims

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