Full
Outline
In order to improve the quality and reliability of in-vehicle communication, in-vehicle visible light communication technology is introduced by analyzing the influence of infrastructure-vehicle channel transmission model and road infrastructure parameters. Based on the line-of-sight channel between the infrastructure and the vehicle, a model is established to analyze the communication loss during signal transmission. Closed-form analytical equation of the system performance are derived by using the line-of-sight communication Bit Error Rate (BER), downtime probability, and the Block Error Rate (BLER). The effect of the composite pointing error on BER, downtime probability, and BLER of the line-of-sight communication system is analyzed. The experimental results show that: under the no-fading and line-of-sight transmission conditions, increase the height of the street light reduces the BER, while increasing the communication link distance increases the BER; raising the downtime threshold reduces the downtime probability of the line-of-sight link; increasing in the number of transmitted bit blocks helps to improve the performance of BLER; when the number of BER blocks is increased, the system’s BLER decreases rapidly; after considering the pointing errors, BER, downtime probability and BLER all increase, which indicates that pointing error has a debilitating effect on the system communication.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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