Optical Digital Signal Receiver for High-Speed Bandwidth
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Solution Overview
Problem
Current electronic technologies face challenges in processing high-speed serial data due to the 'electronic bottleneck,' limiting their ability to achieve accurate matched filtering for ultra-wideband communication and radar systems with ultra-low signal-to-noise ratios.
Innovation Solution
A waveform matching based optical digital signal receiving device is developed, utilizing an optical arbitrary waveform generating module, electro-optic intensity modulator, opto-electric converter, electric filter, sampling and judging module, and digital signal processing unit to perform matched filtering and noise reduction in the optical domain, breaking the limitations of electronic technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electronic technology is used for high-speed serial data processing, then device complexity is reduced, but bandwidth and processing speed are limited due to the electronic bottleneck
Solution Approach 1:
The patent replaces the electronic mechanical system with an optical system. Specifically, it uses optical pulse generation, electro-optic modulation, and opto-electric conversion to process digital signals in the optical domain, thereby overcoming the bandwidth limitations of electronic technology while maintaining system functionality.
Solution Approach 2:
The patent changes the fundamental operating parameter from electrical domain to optical domain. By generating optical pulses with specific widths and periods, and using electro-optic modulators to modulate these pulses, the system achieves higher bandwidth and processing speeds characteristic of optical technology.
2Object-affected harmful factors
If matched filtering is implemented in electronic domain for ultra-low signal-to-noise ratio detection, then noise elimination capability is improved, but processing accuracy deteriorates due to electronic bottleneck limitations
Solution Approach 1:
The patent substitutes the electronic matched filtering system with an optical domain processing system. By performing pulse generation, modulation, and detection in the optical domain, the system achieves superior noise elimination and signal detection accuracy that overcomes the limitations of electronic technology.
3Speed
If optical technology is used for broadband signal processing, then bandwidth and processing speed are improved, but device complexity increases due to additional optical components
Solution Approach 1:
The patent designs an integrated optical receiving device where a single system performs multiple functions: optical pulse generation, electro-optic modulation, opto-electric conversion, and signal detection. This multi-functional design achieves high bandwidth while managing device complexity through functional integration.
4Device complexity
If conventional electronic receiving devices are used, then device complexity is low, but noise influence on signal reception cannot be eliminated to the maximum extent
Solution Approach 1:
The patent replaces the conventional electronic receiving device with an optical domain receiving system. By utilizing optical pulse processing and electro-optic conversion, the system achieves superior noise rejection capabilities that eliminate noise influence to the maximum extent, overcoming the limitations of electronic technology.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables accurate detection and reception of digital signals with significantly improved bandwidth and speed, effectively eliminating noise and overcoming the limitations of electronic technologies.
Implementation Method 1
an electro-optic intensity modulator... the optical pulse sequence is input into the electro-optic intensity modulator; the modulation terminal of the electro-optic intensity modulator receives the to-be-received electrical signal and outputs an optical pulse sequence which is modulated by the to-be-received signal
Implementation Method 2
the optical pulse sequence is firstly sent into the opto-electric converter to be converted into an electrical signal
Data Source
AI summary
A waveform matching based optical digital signal receiving device sequentially comprises an optical arbitrary waveform generator unit, an electro-optic modulator unit, an opto-electric converter unit, an electric filter unit, a sampling and judging module, a digital signal processing unit and a bit-timing extracting module. Accordingly, signal matched filtering, sampling and judgment can be effectively carried out in the optical domain, and the influence of noises on signal reception can be eliminated to the maximum extent, thereby achieving accurate detection and reception of signals. Meanwhile, compared with a conventional electric receiving device, the digital signal receiving device provided by the present invention breaks the limitation of “electronic bottleneck,” and greatly improves the bandwidth of signal reception, which allows digital signal reception at a higher speed.