Optical Communication System With Varying Power LED Transmitter
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Solution Overview
Problem
Current optical communication systems face challenges in efficiently transmitting information using light, particularly in applications requiring high data throughput and reliability, such as in modern communication networks and IoT devices, where existing technologies may not adequately address the need for robust and efficient data transmission.
Innovation Solution
An optical communication system comprising a transmitter with a modulator, biaser, drive level controller, and light emitting diodes (LEDs) that emit light at varying power levels, and a receiver with a detector and demodulator, which processes the received light to retrieve information, utilizing frequency shift keying (FSK) and multiple FSK (MFSK) modulation techniques along with pulse width or phase modulation to achieve high data throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional optical communication systems are used, then the system structure is simple, but the data throughput is limited
Solution Approach 1:
The transmitter is divided into multiple independent LED components, each capable of emitting light at different power levels. The receiver is segmented into multiple detector components, each detecting light from specific LEDs. This segmentation allows parallel data transmission across multiple channels, increasing overall data throughput while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The system transitions from single-channel optical communication to multi-dimensional communication by utilizing multiple LEDs at different power levels and multiple detectors. This dimensional expansion enables simultaneous transmission of multiple data streams across different spatial and power dimensions, significantly improving data throughput without proportionally increasing system complexity.
2Length of stationary object
If high power LEDs are used to increase transmission distance, then the transmission distance is improved, but the energy consumption increases
Solution Approach 1:
Instead of using a single high-power LED for maximum transmission distance, the system employs multiple LEDs operating at different power levels. Each LED can be activated partially or fully depending on the transmission requirements, allowing the system to achieve adequate transmission distance with lower overall energy consumption by using only the necessary power level for each transmission task.
Solution Approach 2:
The system dynamically changes the power level parameter of individual LEDs based on transmission distance requirements. By adjusting which LEDs operate at what power levels, the system optimizes the balance between transmission distance and energy consumption, avoiding the excessive energy usage associated with continuously operating high-power LEDs at maximum capacity.
3Productivity
If multiple LEDs at varying power levels are used, then the data throughput is improved, but the device complexity increases
Solution Approach 1:
Multiple LEDs and detectors are designed with universal functionality, where each component can operate across different power levels and detection thresholds. This multi-functionality allows the same hardware components to handle various data transmission tasks, increasing data throughput through parallel processing while minimizing the need for specialized components and reducing overall device complexity.
Solution Approach 2:
The system uses parameter changes in power levels and detection thresholds to differentiate between multiple data streams rather than requiring physically distinct components for each function. By dynamically adjusting operational parameters, the system achieves high data throughput through software-controlled multi-functionality, reducing hardware complexity despite having multiple LEDs and detectors.
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
The system enables efficient data transmission by altering the duty cycle of LEDs to transmit information effectively, achieving high data throughput and reliability, while also calculating the distance between transmitter and receiver using received signal strength indicator (RSSI), thus addressing the limitations of existing optical communication systems.
Implementation Method 1
at least one light emitting diode (LED) electrically connected to the switch and the biaser, wherein the LED is configured to emit light and pulse at varying power levels between the bias level and the reference voltage
Implementation Method 2
a detector configured to receive light emitted by the LED and output a detected signal
Data Source
AI summary
There is provided an optical communication system comprising: a transmitter comprising: a modulator configured to output a digital signal representing information to be transmitted; a biaser configured to output a bias level; a drive level controller configured to output a control signal; a switch electrically connected to the modulator, wherein the switch receives the digital signal and a reference voltage set by the control signal; and at least one light emitting diode (LED) electrically connected to the switch and the biaser. The LED is configured to emit light and pulse at varying power levels between the bias level and the reference voltage. The system further comprises a receiver comprising: a detector configured to receive light emitted by the LED and output a detected signal; and a demodulator configured to receive the detected signal and output demodulated information.