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A wavelength division multiplexing receiving system for wireless optical communication

A wireless optical communication and receiving system technology, applied in wavelength division multiplexing systems, electromagnetic receivers, etc., can solve problems such as large energy loss

Inactive Publication Date: 2017-05-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of spectral separation, optical filters are used for spectral separation, and the energy loss is very large.

Method used

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  • A wavelength division multiplexing receiving system for wireless optical communication
  • A wavelength division multiplexing receiving system for wireless optical communication
  • A wavelength division multiplexing receiving system for wireless optical communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] to combine figure 1 , figure 2 , image 3 , Figure 4 , a wavelength division multiplexing receiving system for wireless optical communication. It includes a pre-optical system 1, a spectral signal separation system 2, a detector array 3, a high voltage power supply circuit 4, a signal preprocessing circuit 5, a demodulation decoding circuit 6, a digital power supply circuit 7 and a sink 8. The front-end optical system collects multi-spectral signals in the atmosphere, and then the spectral signal separation system spatially separates each spectral segment of the multi-spectral signal and focuses them on each unit of the detector array. The detector array has a total of 8 channels. After converting the optical signal of each spectral band into an electrical signal, the 8-channel signal preprocessing circuit is used to perform current / voltage conversion and amplify it to TTL level. Finally, the demodulation and decoding circuit demodulates and decodes the preprocess...

Embodiment approach 2

[0033] In Embodiment 1, the detector array is composed of 8 APD single-tube splicing. In actual use, any number of APD single tubes or PIN single tubes can be spliced ​​to form a detector array under the premise of meeting the space and band requirements. It is also possible to directly use APD array detectors and PIN array detectors to receive optical signals.

Embodiment approach 3

[0035] Figure 5 Shown is a schematic diagram of a pre-optical system of a wavelength division multiplexing receiving system for wireless optical communication according to Embodiment 3 of the present invention. Compared with Embodiment 1, the front optical system is a catadioptric optical system, including a reflective optical system 501 and a refractive optical system 502 . The viewing angle of the catadioptric optical system is 60°, which is slightly smaller. However, the catadioptric optical system has a simple structure, is easy to process, has little light energy loss, and has a gain of 30. The feature of this embodiment is that at the cost of reducing the field of view, the gain of the system is improved, and the cost and complexity of the system are reduced.

[0036] In order to better understand the present invention, relevant content is supplemented as follows:

[0037] 1. About the signal preprocessing circuit

[0038] The signal preprocessing circuit includes t...

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Abstract

The invention discloses a wavelength division multiplexing receiving system for wireless optical communication. The system is characterized by comprising a front-placed optical system (1), a spectral signal separating system (2), a detector array (3), a high-voltage power supply circuit (4), a signal preprocessing circuit (5), a demodulation decoding circuit (6), a digital power circuit (7) and an information sink (8), wherein a multispectral signal is collected through the front-placed optical system (1), and then all spectral sections of the multispectral signal are separated in space through the spectral signal separation system (2) and respectively focused on all units of the detector array (3); after optical signals of all the spectral sections are transformed into electrical signals through the detector array (3), electric current / voltage transforming is performed on the electrical signals, and the electrical signals are enlarged to a TTL level through the signal preprocessing circuit (5); finally, the preprocessed signals are demodulated and decoded through the demodulation decoding circuit (6) so as to obtain original information and transmit the original information to the information sink (8).

Description

technical field [0001] The invention relates to a signal receiver used in wireless optical communication, especially a signal receiver in the ultraviolet to near-infrared spectrum. Background technique [0002] With the popularization of personal network devices such as tablets and the diversification of network services, people's demand and dependence on wireless networks continue to increase, and traditional WIFI wireless networks can no longer meet the growing needs. As an emerging wireless communication technology, wireless optical communication can be combined with existing wireless communication networks to become an important part of the next generation wireless communication network. The Institute of Electrical and Electronics Engineers (IEEE) has established the standard 802.15.7 for wireless communication in the visible spectrum to guide the design of wireless optical communication systems. Researchers in the United Kingdom, Japan, and South Korea have also designe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/60H04J14/02
Inventor 唐义张学彬黄河清郭蕾
Owner BEIJING INSTITUTE OF TECHNOLOGYGY