Wireless Receiver Interference Detection Using Specialized Detectors
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Solution Overview
Problem
Wireless communications systems are susceptible to interference from blockers and jammers, which degrade receiver sensitivity and increase bit error rates, and existing interference mitigation techniques add complexity and cost to the system.
Innovation Solution
A method and apparatus that utilize multiple detectors, including a Viterbi detector and a threshold detector, to identify and mitigate different types of interference at the receiver, without altering the transmitter channel or adding redundancy, by dynamically switching between detection techniques based on the type of interference present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional interference mitigation techniques (coding, spreading, power adaptation, spatial cancellation) are used, then interference resistance is improved, but device complexity and cost increase
Solution Approach 1:
The detection process is segmented into multiple independent detectors, each specialized for detecting specific interference types. The receiver employs separate detectors for thermal noise, narrowband interference, and wideband interference, allowing each detector to be optimized for its specific function without requiring the entire system to be complex
Solution Approach 2:
Different detectors are assigned to handle different local characteristics of interference. Each detector is tailored to its specific interference type (narrowband, wideband, thermal noise), providing localized optimization for each interference scenario rather than using a single complex universal detector
2Reliability
If error correction codes are added to improve immunity, then reliability is improved, but data throughput decreases
Solution Approach 1:
The invention extracts the interference mitigation function from the transmitter and places it at the receiver. By using multiple specialized detectors at the receiver side, the system achieves error correction capability without requiring additional coding redundancy at the transmitter, thus maintaining full data throughput
3Reliability
If multiple detectors specialized for different interference types are used, then interference resistance is improved, but device complexity increases
Solution Approach 1:
The detection function is segmented into multiple independent detectors, each specialized for specific interference types. This segmentation allows each detector to be simple and optimized for its specific task, rather than requiring one complex universal detector to handle all interference types
Solution Approach 2:
The system dynamically switches between different detectors based on the detected interference type. A controller selects the appropriate detector (thermal noise detector, narrowband interference detector, or wideband interference detector) based on real-time interference conditions, making the system adaptable without requiring all detectors to operate simultaneously
Data Source
AI summary
There are provided methods and apparatuses for reducing the effect of interference at a receiver of a wireless communications system. They include receiving a transmitted bit stream at the receiver, determining a type of interference present in the transmitted bit stream, the type of interference comprising a first type of interference and a second type of interference, detecting the transmitted bit stream based on the type of interference present in the transmitted bit stream.