UWB Transceiver Narrowband Interference Detection
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Solution Overview
Problem
Ultrawideband wireless communication systems face difficulties in avoiding interference with narrowband transmitters, which can limit communication bandwidth and are challenging to detect, especially in scenarios where interference with allocated spectrum is regulated.
Innovation Solution
A method and transceiver system that includes downconversion, analog-to-digital conversion, Fast Fourier Transform processing, filtering, correlation, and notch filtering to detect and avoid narrowband transmissions by identifying and reducing signal components at frequencies used by narrowband systems, utilizing a combination of hardware and software components for efficient detection and minimization of interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ultrawideband system reduces transmissions to avoid narrowband interferers, then interference with narrowband systems is reduced, but communication bandwidth is limited
Solution Approach 1:
The ultrawideband frequency spectrum is divided into multiple sub-bands or frequency segments. The system identifies which segments contain narrowband interferers and transmits only in the remaining clear segments, thereby maintaining effective communication bandwidth while avoiding interference with narrowband systems.
Solution Approach 2:
The system dynamically adjusts its transmission spectrum by continuously monitoring for narrowband interferers and adapting which frequency portions are used for transmission. This dynamic spectrum access allows the system to maximize bandwidth utilization while avoiding harmful interference in real-time conditions.
2Measurement precision
If ultrawideband system monitors for narrowband transmitters, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The ultrawideband receiver's existing signal processing components are designed to perform multiple functions: standard ultrawideband signal reception and detection of narrowband interferers. By making the receiver multi-functional, the system achieves accurate narrowband detection without adding separate dedicated detection hardware, thus improving detection accuracy while limiting complexity increase.
Solution Approach 2:
The ultrawideband system uses its own received signal processing capabilities to detect narrowband interferers, rather than requiring completely separate detection systems. The existing correlation and signal analysis functions are adapted to identify narrowband characteristics, allowing the system to self-monitor for interferers using its inherent processing resources.
Data Source
AI summary
A method and system for detecting the presence of narrowband transmitters utilizing frequencies also utilized by wider band communication systems. In some embodiments an ultrawideband transceiver detects signals at specific frequencies within a spectrum of frequencies, and analyzes the signals to determine if the signals indicate transmissions by a narrowband transmitter in a narrowband communication system. In further embodiments transmission circuitry reduces signal components at frequencies occupied by the narrowband transmitters.