RF Transmitter Identification via Chunk Amplitude Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for identifying radio frequency transmitters are complex and prone to false detections due to the mixture of radio frequency sequences from multiple transmitters, increasing the probability of ghost code detection.
Innovation Solution
A method and system that split radio frequency sequences into chunks, equalize the channel using a subset of these chunks, measure the amplitude of another subset, and compare the amplitudes to predefined sequences to identify the transmitter, reducing noise and false detection rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complicated correlation procedures and decoders are used to identify a radio frequency transmitter, then the identification accuracy is improved, but the device complexity and processing cost increase
Solution Approach 1:
The patent segments the radio frequency sequence into multiple chunks and processes them separately through parallel correlation operations. Instead of using complex sequential correlation procedures, the method divides the sequence into manageable segments that can be processed independently and efficiently, reducing overall processing complexity while maintaining identification accuracy.
Solution Approach 2:
The patent replaces complex mechanical correlation procedures and decoder operations with a simplified mathematical approach based on measuring amplitude ratios of frequency components. This substitution transforms a mechanically complex process into a computationally efficient operation that achieves the same identification goal with reduced complexity.
2Adaptability or versatility
If multiple radio frequency sequences from different transmitters are received, then the coverage and detection capability are improved, but the false detection rate increases due to ghost code
Solution Approach 1:
The patent introduces an intermediary measurement approach by using amplitude ratios of frequency components as a mediator between the received signal and the correlation result. This intermediary measurement is less susceptible to ghost code interference than direct correlation, allowing the system to maintain high detection capability across multiple transmitters while reducing false detection rates.
Solution Approach 2:
The patent changes the measurement parameter from direct correlation output to amplitude ratio of frequency components. By measuring the ratio of amplitudes at different frequencies rather than relying on peak correlation values, the method becomes more robust against ghost code interference while maintaining the ability to distinguish between different transmitters.
3Adaptability or versatility
If the number of radio frequency transmitters increases, then the system versatility is improved, but the probability of ghost code detection increases
Solution Approach 1:
The patent uses amplitude ratio measurement as an intermediary that is inherently more robust to the increased interference from multiple transmitters. This intermediary approach allows the system to scale to more transmitters without proportionally increasing ghost code detection probability.
Solution Approach 2:
By changing from correlation-based detection to amplitude ratio-based detection, the system achieves better scalability. The amplitude ratio parameter remains stable even as the number of transmitters increases, allowing the system to maintain reliability while increasing versatility.
Data Source
AI summary
A method for identifying a radio frequency transmitter is described, wherein a radio frequency signal is received via a radio frequency channel, the radio frequency signal including at least one radio frequency sequence. The sequence received is split into a plurality of chunks. The radio frequency channel is equalized by using a first subset of the plurality of chunks. The amplitude of each chunk of a second subset of the plurality of chunks is measured in the equalized radio frequency channel. The at least one amplitude is used for deciding whether the at least one sequence of the radio frequency signal corresponds to a sequence listed in a list. Further, a system for identifying a radio frequency transmitter is described.