Vehicle Remote Control Repeater for Range Extension
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Solution Overview
Problem
Factory-installed vehicle remote control systems have a limited reception range, typically between 100 and 300 feet, which is insufficient compared to aftermarket systems that often exceed 800 feet, necessitating a solution to extend the range for improved functionality.
Innovation Solution
A repeater system that receives and retransmits radio frequency signals to extend the range of vehicle remote control systems, including down-converting and filtering signals, and determining signal strength to decide whether to generate a second RF signal, thereby enhancing the reception range and enabling compatibility with initially incompatible two-way transmitters/receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a factory-installed remote control system is used, then the system integrates well with the vehicle, but the reception range is limited to 100-300 feet
Solution Approach 1:
A repeater device is introduced as an intermediary component between the remote transmitter and the factory-installed receiver. The repeater receives signals from the transmitter, processes them, and retransmits them to the receiver, thereby extending the effective communication range while maintaining compatibility with the existing factory-installed system.
Solution Approach 2:
The communication system is divided into separate functional components: the original factory-installed receiver, the added repeater device, and the remote transmitter. This segmentation allows the repeater to be independently optimized for signal processing and range extension without modifying the core factory-installed system.
2Length of stationary object
If an aftermarket remote start system is used, then the reception range exceeds 800 feet, but the system requires complete replacement of the factory installation
Solution Approach 1:
The repeater device is designed to work with existing factory-installed remote control systems, providing the extended range capability of aftermarket systems while maintaining compatibility with the original factory installation. This eliminates the need for complete system replacement.
Solution Approach 2:
The repeater serves as a bridge between factory-installed and aftermarket system requirements, allowing users to achieve extended range performance without undergoing a complete system swap.
3Length of stationary object
If the repeater always generates a second RF signal, then the reception range is extended, but false activations may occur due to signal interference
Solution Approach 1:
The repeater continuously monitors the strength and quality of received RF signals, using this feedback information to intelligently determine whether to generate and retransmit a second signal. This prevents false activations by avoiding retransmission of weak or corrupted signals.
Solution Approach 2:
The repeater adjusts its signal processing parameters based on received signal characteristics, including threshold-based decision making and adaptive filtering, to distinguish valid commands from interference or noise.
4Length of stationary object
If the repeater processes and generates second RF signals, then the reception range is extended, but energy consumption increases
Solution Approach 1:
The repeater operates in a periodic manner, actively receiving and processing signals only when remote transmitters are detected within range, rather than continuously transmitting. This reduces overall energy consumption while maintaining extended range capability when needed.
Solution Approach 2:
The repeater dynamically adjusts its operational parameters including receiver sensitivity thresholds and retransmission timing based on signal conditions, optimizing the balance between range extension and energy consumption.
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 repeater system effectively extends the reception range of factory-installed remote control systems, allowing for remote keyless entry and start functions beyond the original range, and enables upgrading to two-way communication capabilities without requiring complete system replacement.
Implementation Method 1
receiving, at a repeater, a first radio frequency (RF) signal having inbound data packets indicating a vehicle function to be performed from a remote transmitter; transmitting, from the repeater, the second RF signal to a reception module of a vehicle remote control system
Implementation Method 2
down-converting, at the repeater, the first RF signal to a base-band signal
Implementation Method 3
filtering, at the repeater, the base-band signal prior to generating the second RF signal
Data Source
AI summary
A method for extending a reception range of a vehicle remote control system includes: receiving, at a repeater, a first radio frequency (RF) signal having inbound data packets indicating a vehicle function to be performed from a remote transmitter; generating, at the repeater, a second RF signal by placing outbound data packets indicating the vehicle function to be performed between the inbound data packets until reception of the first RF signal is complete; and transmitting, from the repeater, the second RF signal to a reception module of a vehicle remote control system.