Optical Communication Drive Circuit Clock Signal Generation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing optical communication systems face delays and errors in data transmission due to the need for waveform selection and inversion of frequency signals, which can lead to communication errors and reduced data transmission rates.

Innovation Solution

An optical communication drive circuit that generates a clock signal with alternating first and second frequency signals based on an initial frequency signal, eliminating the need for waveform selection and inversion, and uses a control sub-circuit to select control words corresponding to bits in the information to be transmitted, ensuring correct demodulation and improved communication quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If waveform selection and inversion of frequency signals is used for modulation, then communication can be implemented, but output delays and bit errors occur

Engineering Contradiction:

Improvecommunication accuracyVSAvoidtransmission delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Instead of inverting frequency signals and selecting waveforms as in conventional modulation, this patent inverts the approach by directly selecting between two predetermined frequency signals (first frequency signal and second frequency signal) based on the data to be transmitted. This eliminates the inversion step that causes delays and bit errors while maintaining modulation functionality.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent prepares two frequency signals with predetermined frequencies before transmission. These pre-prepared signals are stored ready for immediate selection based on the input data, eliminating the need for real-time waveform generation and inversion operations that cause delays in conventional systems.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If waveform selection and inversion is performed, then modulation is achieved, but data transmission rate decreases

Engineering Contradiction:

Improvedata transmission rateVSAvoidmodulation process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent simplifies the modulation process by inverting the conventional approach: instead of generating a carrier wave and then inverting/modifying it, the system directly selects between two pre-defined frequency signals. This eliminates complex waveform selection and inversion operations, reducing processing complexity and increasing transmission rate.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The modulation process is segmented into two distinct frequency signals (first frequency signal and second frequency signal) with predetermined frequencies. Each signal corresponds to specific data states, allowing direct selection without complex processing. This segmentation simplifies the overall modulation operation and enables faster transmission.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11474556B2Optical communication drive circuit and method, optical communication transmitter and system, and vehicle

Publication Date: 2022.10.18 BEIJING BOE TECH DEV CO LTD

AI summary

The present disclosure provides an optical communication drive circuit and method, an optical communication transmitter, an optical communication system, and a vehicle. The optical communication drive circuit includes a clock circuit and a modulation circuit. The clock circuit is configured to output a clock signal with an initial frequency signal as an input under control of information to be transmitted. The clock signal includes alternating first and second frequency signals, the first frequency signal and the second frequency signal having different frequencies and being generated based on the initial frequency signal; and the modulation circuit is configured to modulate an optical signal by the clock signal to obtain a modulated optical signal.