Vehicular visible light wireless digital voice communication system

A digital voice and communication system technology, applied in the field of communication, can solve the problems of poor anti-interference ability and low communication rate, achieve strong driving ability, high communication rate, and reduce traffic accidents

Inactive Publication Date: 2015-04-01
NANCHANG UNIV
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  • Application Information

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Problems solved by technology

[0003] The patent (application number: 201110284925 a voice information notification system based on LED visible light) uses OOK modulation to modulate the voice signal and the maximum bandwidth does not exceed 100kHz. This modulation method has poor anti-interference ability and low communication rate.

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  • Vehicular visible light wireless digital voice communication system
  • Vehicular visible light wireless digital voice communication system
  • Vehicular visible light wireless digital voice communication system

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Embodiment Construction

[0035] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific examples.

[0036] Such as figure 1 Shown is a general block diagram of a vehicle-mounted visible light wireless digital voice communication system according to an embodiment of the present invention. Including sending module and receiving module. The sending module includes a digital audio acquisition unit, an RS encoding unit, a PWM modulation unit, an LED drive unit, and an LED emission unit. The receiving module includes a PIN photodetection unit, a signal extraction unit, a PWM demodulation unit, an RS decoding unit, and a digital audio output unit.

[0037]The sending module and receiving module are realized based on the platform with Zed-board (FPGA+ARM) as the core. The Zed-board platform is configured with Flash and SDRAM. It is an independent SOPC minimum system board, supports SOPC development, and supports the development based on Nios II soft...

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Abstract

The invention discloses a vehicular visible light wireless digital voice communication system. The vehicular visible light wireless digital voice communication system comprises a sending module and a receiving module. The sending module comprises a digital audio acquisition unit, an RS coding unit, a PWM (pulse width modulation) unit, an LED (light emitting diode) drive unit and an LED transmitting unit, which are connected successively in circuit; the receiving module comprises a PIN photoelectric detection unit, a signal extraction unit, a PWM modulation unit, an RS decoding unit and a digital audio output unit, which are connected successively in circuit. The wireless digital voice communication system realizes instant voice communication between strange vehicles; an LED-based lamp is integrated with automobile lighting and communication without the need of an additional signal emission source installation space and occupation of scarce frequency spectrum resource. The voice signal transmission is high-speed and reliable, high in integration level, strong in anti-interference ability and low in cost, and bigger communication distance and more reliable communication are realized; moreover, a detector has high accuracy, high responsivity, low dark current, higher communication rate, stronger anti-interference ability and high reliability of a transmission channel.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a vehicle-mounted voice communication system. Background technique [0002] Visible light communication (VLC) is a new type of wireless optical communication technology developed on the basis of white light LED technology. It uses the visible light band as an information carrier, does not use optical fiber and other limited-channel transmission media, and directly transmits optical signals in the air. Communication technology. In the visible light communication system, the white light LED has dual functions of communication and lighting. Since the modulation rate of the LED is very high, the human eye cannot feel its flicker at all. In recent years, with the global emphasis on green energy and energy conservation and environmental protection, high-brightness visible light LEDs have developed rapidly due to their significant advantages such as high energy efficiency and no pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116
Inventor 鄢秋荣曹青山刘鸿清陈都顾秀秀廖庆洪王慧
Owner NANCHANG UNIV
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