CN116155395B - Optical wireless communication space division multiplexing receiving device - Google Patents
Optical wireless communication space division multiplexing receiving device Download PDFInfo
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- CN116155395B CN116155395B CN202310420100.9A CN202310420100A CN116155395B CN 116155395 B CN116155395 B CN 116155395B CN 202310420100 A CN202310420100 A CN 202310420100A CN 116155395 B CN116155395 B CN 116155395B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides an optical wireless communication space division multiplexing receiving device, which comprises a bottom device and a camera lens, wherein the bottom device comprises a plurality of photoelectric processing units, an external signal input unit and a signal parallel output unit, the photoelectric processing units are arranged in a row-column type array to form a processing unit group, and the processing unit group is electrically connected with the external signal input unit and the signal parallel output unit respectively; the photoelectric processing unit comprises a photoelectric detection pixel unit group, a register group, a control logic unit, a combiner unit, an analog signal processing unit and an analog-to-digital conversion unit, wherein the output end of the control logic unit is electrically connected with the input ends of the analog-to-digital conversion unit and the register group respectively. The pixel photodiodes arranged in an array collect optical signals from different directions, and the multiple photoelectric processing units are arranged in an array mode, so that digital signal output of each photoelectric processing unit is continuous and uninterrupted, frame gaps are avoided, and random frame data loss is caused when the signals are detected.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an optical wireless communication space division multiplexing receiving device.
Background
Optical wireless communication is a communication technology using visible light and infrared wave bands to modulate signals, and because the wave bands are adopted, electromagnetic radiation is not needed, spectrum registration is not needed, compared with the short-cut electric wireless communication spectrum, the optical wireless communication has abundant available spectrum resources, and the optical wireless communication is also regarded as one of key technologies for future 6G wireless communication construction. Similar to electrical wireless communication, optical wireless communication may also employ multiplexing techniques such as time division multiplexing, frequency division multiplexing, code division multiplexing, and space division multiplexing in view of multi-user access, multi-transceiver antennas, or terminal rate boosting. Compared with a multiplexing mode requiring complex algorithm cooperation, the space division multiplexing is the most efficient multiplexing mode, and can doubly improve the channel capacity.
Currently, an image sensor is a natural optical wireless detection device. The visible light communication system based on the image sensor is a typical space division multiplexing optical wireless communication system, and the technology can image and detect the light modulation signal through pixel change in the image, and has the unique advantage on an indoor communication and positioning fusion system. However, two types of image sensors, CCD (charge coupled device) and CMOS (complementary metal oxide semiconductor) image sensors, are used for communication with inherent drawbacks. The CCD response speed is slow, and the CMOS image sensor is based on row and column selection mode, and can produce rolling shutter effect, in addition, the biggest problem is that frame gap always appears in the processing of image sensor, and as a result, when detecting signals, the optical signals carried by two continuous frame image signals detected by the image sensor are discontinuous, and random frame data loss can be caused.
Disclosure of Invention
The invention provides an optical wireless communication space division multiplexing receiving device, which aims to solve the technical problem that random frame data is lost due to the fact that optical signals carried by continuous two-frame image signals detected by an image sensor are discontinuous.
The invention provides an optical wireless communication space division multiplexing receiving device, which comprises a bottom device and a camera lens, wherein the bottom device comprises a plurality of photoelectric processing units, an external signal input unit and a signal parallel output unit, the photoelectric processing units are arranged in a row-column type array to form a processing unit group, and the processing unit group is respectively and electrically connected with the external signal input unit and the signal parallel output unit;
the photoelectric processing unit comprises a photoelectric detection pixel unit group, a register group, a control logic unit, a combiner unit, an analog signal processing unit and an analog-to-digital conversion unit, wherein the output end of the control logic unit is respectively and electrically connected with the input ends of the analog-to-digital conversion unit and the register group;
the photoelectric detection pixel unit group is formed by arranging a plurality of pixel photodiodes through a determinant array and is used for detecting optical signals;
the register group is arranged for a plurality of register unit arrays, and the register units are connected with the corresponding pixel photodiodes through MOSFETs;
the register unit forms a logic circuit through 1 NOT AND gate, 1 NOT gate and 2 OR gates and is used for controlling the pixel photodiode to detect optical signals;
the control logic unit also converts the received input signal into a row or column selection signal, and sends the selection signal to the register unit respectively, wherein the selection signal is a high-low level signal corresponding to the row or column.
Further, the photoelectric detection pixel unit is electrically connected with the register set and the combiner unit respectively, and is electrically connected with the analog signal processing unit and the analog-to-digital conversion unit sequentially through the combiner unit.
Further, the control logic unit converts the received input signal of the external signal input unit, controls the corresponding pixel photodiode to detect the optical signal through the register unit, and performs clock synchronization.
Further, the combiner unit is configured to perform signal synthesis on the electrical signals output in the detection process of the plurality of pixel photodiodes in a direct superposition manner, and output the signals to the analog signal processing unit.
Further, the analog signal processing unit is used for controlling attenuation or amplification of the signal sent by the combiner unit.
Further, the analog-to-digital conversion unit is used for converting the signal attenuated or amplified by the analog signal processing unit into a digital signal and transmitting the digital signal to the signal parallel output unit.
Compared with the prior art, the optical wireless communication space division multiplexing receiving device provided by the invention has the following advantages:
1. the photoelectric detection pixel unit group is arranged in an array through a plurality of pixel photodiodes, the pixel photodiodes arranged in an array collect optical signals from different directions in space, the optical signals are converted into digital signals through the combiner unit, the analog signal processing unit and the analog-to-digital conversion unit in sequence, and the digital signals are output through the signal parallel output unit, so that the use of the multi-input multi-output optical antenna is realized. Meanwhile, the plurality of photoelectric processing unit arrays are arranged, and the single photoelectric processing unit comprises a plurality of pixel photodiode arrays, so that the digital signal output of each photoelectric processing unit is continuous and uninterrupted, and frame gaps are avoided, and random frame data loss can be caused when detecting signals. Meanwhile, the pixel photodiodes and the register unit arrays are connected in a set mode, switching of any pixel photodiode can be achieved, flexible and adjustable space division multiplexing is achieved, and light signal interference can be minimized through selecting the switching pixel photodiodes under different scenes.
Drawings
Fig. 1 is a bottom layer device structure diagram of an optical wireless communication space division multiplexing receiving device provided by the invention;
fig. 2 is a block diagram of an optical-electrical processing unit in an optical wireless communication space division multiplexing receiving device provided by the invention;
FIG. 3 is a block diagram of a register set in an optical wireless communication space division multiplexing receiver device according to the present invention;
fig. 4 is a block diagram of a register unit in an optical wireless communication space division multiplexing receiving device according to the present invention;
fig. 5 is a diagram showing the connection between a register and a pixel photodiode in an optical wireless communication space division multiplexing receiving device.
Detailed Description
For the purpose of making the technical solution and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples of implementation. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Referring to fig. 1 to 5, the invention provides an optical wireless communication space division multiplexing receiving device, which comprises a bottom device and a camera lens, wherein the bottom device comprises a plurality of photoelectric processing units, an external signal input unit and a signal parallel output unit, the photoelectric processing units are arranged in a row-column type array to form a processing unit group, and the processing unit group is respectively and electrically connected with the external signal input unit and the signal parallel output unit; the photoelectric processing unit comprises a photoelectric detection pixel unit group, a register group, a control logic unit, a combiner unit, an analog signal processing unit and an analog-to-digital conversion unit, wherein the output end of the control logic unit is electrically connected with the input ends of the analog-to-digital conversion unit and the register group respectively.
It can be understood that the photoelectric detection pixel unit group is arranged in an array through a plurality of pixel photodiodes, the pixel photodiodes arranged in an array collect optical signals from different directions in space, the optical signals are converted into digital signals through the combiner unit, the analog signal processing unit and the analog-to-digital conversion unit in sequence, and the digital signals are output through the signal parallel output unit, so that the use of the multi-input multi-output optical antenna is realized. Meanwhile, the plurality of photoelectric processing unit arrays are arranged, and the single photoelectric processing unit comprises a plurality of pixel photodiode arrays, so that the digital signal output of each photoelectric processing unit is continuous and uninterrupted, and frame gaps are avoided, and random frame data loss can be caused when detecting signals.
Preferably, the photoelectric detection pixel units are respectively and electrically connected with the register group and the combiner unit, and are sequentially and electrically connected with the analog signal processing unit and the analog-to-digital conversion unit through the combiner unit.
It can be understood that the photoelectric detection pixel unit group works according to the high-low level signals sent by the register group, and the detection pixel unit group receives corresponding optical signals according to the received high-low level signals and sequentially converts the optical signals into digital signals through the combiner unit, the analog signal processing unit and the analog-to-digital conversion unit.
Preferably, the photodetecting pixel unit group is provided with a plurality of pixel photodiodes through a determinant array for performing optical signal detection.
It can be appreciated that the pixel photodiode converts the received optical signal into an electrical signal, and has the characteristics of high sensitivity and rapid response. The photoelectric detection pixel unit group is arranged through a plurality of pixel photodiode arrays, so that light signals from different directions in space can be collected conveniently, and high-speed optical wireless communication is realized.
Preferably, the register set is provided for a plurality of register cell arrays, the register cells being connected to corresponding pixel photodiodes through MOSFETs.
Preferably, the register unit forms a logic circuit by 1 NOT AND gate, 1 NOT gate and 2 OR gates, and is used for controlling the pixel photodiode to detect the optical signal.
It will be appreciated that the array set of registers controls the photodetector pixel cells to turn on or off light signal reception via the set of MOSFETs. Specifically, the MOSFET group is composed of a plurality of MOSFET tubes, wherein the number of the MOSFET tubes, the register unit and the pixel photodiode is identical, the MOSFET tubes are respectively connected with the register unit and the pixel photodiode, the register unit is respectively and correspondingly connected with the pixel photodiode through the MOSFET tubes, and the signal flow between the register and the pixel photodiode is controlled through the MOSFET tubes, so that the signal of each pixel can be correctly read and processed.
It will be appreciated that the photo-detection pixel unit is enabled for optical signal detection when the register stores a high level signal and is disabled when the register stores a low level signal.
Preferably, the control logic unit converts the received input signal of the external signal input unit, controls the corresponding pixel photodiode to perform optical signal detection through the register unit, and performs clock synchronization.
Preferably, the combiner unit is configured to perform signal synthesis on the electrical signals output in the detection process of the plurality of pixel photodiodes in a direct superposition manner and output the signals to the analog signal processing unit.
Preferably, the analog signal processing unit is configured to control attenuation or amplification of the signal sent by the combiner unit.
Preferably, the analog-to-digital conversion unit is configured to convert the signal attenuated or amplified by the analog signal processing unit into a digital signal, and send the digital signal to the signal parallel output unit.
It can be understood that, in operation, the control logic unit can receive the external crystal oscillator signal to generate the system synchronization clock in the optical wireless communication space division multiplexing receiving device. Meanwhile, the control logic unit also converts the received input signals into row or column selection signals and sends the selection signals to the register unit respectively, wherein the selection signals are high-low level signals corresponding to the rows or the columns. The register unit is connected with the pixel photodiodes in a one-to-one correspondence manner, the register unit controls the pixel photodiodes at corresponding positions to detect optical signals through high and low level signals, when the register stores high level signals, the photoelectric detection pixel unit is enabled to detect the optical signals, the register stores low level signals, and the photoelectric detection pixel unit is not enabled. The pixel photodiode converts the detected optical signals into electric signals, the electric signals are superimposed and synthesized through the combiner, the synthesized electric signals are attenuated or amplified through the analog signal processing unit and sent to the analog-to-digital conversion unit, the attenuated or amplified electric signals are converted into digital signals through the analog-to-digital conversion unit, and the digital signals are output through the signal parallel output unit, so that the use of the multi-input multi-output optical antenna is realized. Meanwhile, the digital signal output of each photoelectric processing unit is continuous and uninterrupted, so that frame gaps are avoided, and random frame data loss can be caused when detecting signals. Furthermore, the pixel photodiodes and the register unit arrays are connected in a mode of setting, so that switching of any pixel photodiode can be achieved, flexible and adjustable space division multiplexing is further achieved, and the minimization of optical signal interference can be achieved through selecting the switching pixel photodiodes under different scenes.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, but any modifications, equivalents, improvements, etc. within the principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides an optical wireless communication space division multiplexing receiving device, includes bottom device and camera lens, its characterized in that: the bottom device comprises a plurality of photoelectric processing units, an external signal input unit and a signal parallel output unit, wherein the photoelectric processing units are arranged in a row-column type array to form a processing unit group, and the processing unit group is electrically connected with the external signal input unit and the signal parallel output unit respectively;
the photoelectric processing unit comprises a photoelectric detection pixel unit group, a register group, a control logic unit, a combiner unit, an analog signal processing unit and an analog-to-digital conversion unit, wherein the output end of the control logic unit is respectively and electrically connected with the input ends of the analog-to-digital conversion unit and the register group;
the photoelectric detection pixel unit group is formed by arranging a plurality of pixel photodiodes through a determinant array and is used for detecting optical signals;
the register group is arranged for a plurality of register unit arrays, and the register units are connected with the corresponding pixel photodiodes through MOSFETs;
the register unit forms a logic circuit through 1 NOT AND gate, 1 NOT gate and 2 OR gates and is used for controlling the pixel photodiode to detect optical signals;
the control logic unit also converts the received input signal into a row or column selection signal, and sends the selection signal to the register unit respectively, wherein the selection signal is a high-low level signal corresponding to the row or column.
2. An optical wireless communication space division multiplexing receiving device according to claim 1, wherein: the photoelectric detection pixel unit is respectively and electrically connected with the register group and the combiner unit, and is sequentially and electrically connected with the analog signal processing unit and the analog-to-digital conversion unit through the combiner unit.
3. An optical wireless communication space division multiplexing receiving device according to claim 1, wherein: the control logic unit converts the received input signals of the external signal input unit, controls the corresponding pixel photodiodes to detect optical signals through the register unit, and performs clock synchronization.
4. An optical wireless communication space division multiplexing receiving device according to claim 3, wherein: the combiner unit is used for synthesizing signals of electric signals output in the detection process of the pixel photodiodes in a direct superposition mode and outputting the signals to the analog signal processing unit.
5. An optical wireless communication space division multiplexing receiving device according to claim 4, wherein: the analog signal processing unit is used for controlling attenuation or amplification of the signal sent by the combiner unit.
6. An optical wireless communication space division multiplexing receiving device according to claim 5, wherein: the analog-to-digital conversion unit is used for converting the signal attenuated or amplified by the analog signal processing unit into a digital signal and transmitting the digital signal to the signal parallel output unit.
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| CN203492026U (en) * | 2013-10-10 | 2014-03-19 | 深圳光启创新技术有限公司 | Optical receiver and optical communication system |
| CN106569286B (en) * | 2016-10-27 | 2019-04-16 | 合肥欣奕华智能机器有限公司 | A kind of photoelectric detection system |
| CN109347557B (en) * | 2018-11-27 | 2021-12-10 | 南京邮电大学 | Multi-input multi-output optical communication system and communication method based on filtering effect |
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| CN104243868A (en) * | 2014-09-29 | 2014-12-24 | 上海集成电路研发中心有限公司 | High-resolution CMOS (complementary metal oxide semiconductor) image sensor |
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