Co-channel Wireless Detection Using Multi-Protocol Correlators
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Solution Overview
Problem
Wireless communication devices face challenges in accurately identifying incoming data packets due to harmonics of one wireless protocol interfering with another, leading to improper interpretation and potential loss of data.
Innovation Solution
An electronic device with multiple correlators for different wireless protocols is used to determine the correct protocol of an incoming data packet, filtering out harmonics and ensuring accurate decoding by employing correlators for each protocol and a comparator to manage signal interpretation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless protocols are supported on the same platform with a common antenna, then the device's versatility and communication capability are improved, but co-channel interference from harmonics causes false detection and data loss
Solution Approach 1:
The patent applies preliminary action by performing protocol detection and harmonic identification before data decoding. The system uses correlation techniques to detect the presence of different wireless protocols and their harmonics in the received signal, then filters out identified harmonics before passing the cleaned signal to the appropriate protocol decoder. This preliminary filtering prevents false detection and ensures accurate data interpretation.
Solution Approach 2:
The patent introduces an intermediary detection and filtering mechanism between the common antenna and multiple protocol decoders. This intermediary system correlates the received signal with known protocol signatures, identifies harmonics from co-channel protocols, and selectively filters them out. This mediator prevents harmonic interference from reaching the decoders, thereby maintaining high detection accuracy while supporting multiple protocols.
2Productivity
If protocol detection is performed without harmonic filtering, then the detection process is simple and fast, but false positives and negatives occur due to harmonic interference
Solution Approach 1:
The system performs preliminary correlation-based protocol detection to quickly identify potential protocols in the received signal. This initial fast detection is followed by harmonic identification and filtering only when needed, maintaining high overall detection speed while improving accuracy. The correlation technique provides rapid protocol signature matching without requiring complex processing of the entire signal.
Solution Approach 2:
The patent changes detection parameters dynamically based on signal characteristics. The system adjusts correlation thresholds and filtering parameters according to the detected protocol type and observed harmonic levels. This adaptive parameter adjustment maintains fast detection for clear signals while applying more rigorous filtering only when harmonic interference is detected, thus balancing speed and accuracy.
3Measurement precision
If harmonics are filtered out using correlation techniques, then false detection is prevented and accuracy improves, but the device complexity and processing requirements increase
Solution Approach 1:
The patent segments the signal processing function into distinct modules: a correlation-based protocol detector, a harmonic identifier, and a selective filter. Each module handles a specific aspect of the detection and filtering process. This segmentation allows the system to apply complex correlation and filtering only when needed for specific protocols, rather than continuously processing all signals through the entire chain, thus reducing overall computational burden.
Solution Approach 2:
The system uses correlation with copied known protocol signatures to detect incoming signals. Instead of complex analysis, it compares the received signal against stored templates of expected protocol signatures. This copying approach provides accurate detection with relatively simple processing, as the correlation operation is computationally efficient compared to full signal reconstruction or advanced spectral analysis.
Data Source
AI summary
An electronic device includes an antenna configured to receive a wireless signal. The electronic device also includes a first correlator configured to correlate the wireless signal to a communication of a first wireless protocol type and a second correlator configured to correlate the wireless signal to a communication of a second wireless protocol type.