Dual-ADC RF Receiver for Out-of-Band Interference Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Interference within the same frequency band or between adjacent frequency bands in wireless local area networks (WLANs) significantly impacts transmission stability and throughput, necessitating improved methods to identify and manage different types of interference for enhanced packet receiving performance.
Innovation Solution
A wireless communication device incorporating a mixer, low-pass filter, in-band and wideband ADCs, and a baseband processor to perform frequency conversion, filtering, and signal comparison to distinguish between in-band and out-of-band interference, allowing for real-time adjustment of reception parameters to optimize system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a wireless communication device uses a single in-band ADC for signal conversion, then the device complexity is reduced, but the ability to detect out-of-band interference is lost
Solution Approach 1:
The patent divides the signal conversion function into two separate ADCs: an in-band ADC for converting baseband signals and a wideband ADC for converting mixed signals. This segmentation allows each ADC to be optimized for its specific frequency range, enabling the system to detect both in-band and out-of-band interference simultaneously without requiring a single overly complex wideband ADC.
Solution Approach 2:
The patent introduces a new dimension to the signal processing architecture by adding a parallel wideband signal processing path alongside the existing in-band path. This dimensional expansion enables the system to monitor signal characteristics across a broader frequency spectrum, providing an additional perspective for interference detection without replacing the original in-band processing functionality.
2Reliability
If the wireless communication device implements comprehensive interference processing for different interference types, then the packet receiving performance is improved, but the device complexity increases
Solution Approach 1:
The patent segments the interference detection and processing functions into distinct modules: the in-band ADC handles in-band interference processing while the wideband ADC handles out-of-band interference detection. This modular segmentation allows comprehensive interference processing to be achieved through coordinated operation of simpler, specialized components rather than a single complex processing unit.
Solution Approach 2:
The patent creates a multi-functional system where the baseband processor coordinates both in-band and wideband signal processing paths, enabling a single device to handle multiple interference types (in-band and out-of-band) through universal processing logic that adapts to different interference conditions without requiring separate dedicated hardware for each interference type.
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 solution enables rapid identification and management of interference types, enhancing packet receiving performance by adjusting parameters such as AGC and enabling protocol protection mechanisms, thereby improving overall transmission quality.
Implementation Method 1
The mixer is configured to mix a radio frequency signal and a carrier signal for performing frequency conversion on the radio frequency signal
Implementation Method 2
The LPF is coupled to the mixer and having a passband, and configured to perform filtering on the mixed signal to filter out signal components of the mixed signal out of the passband
Implementation Method 3
The in-band ADC is coupled to the LPF and configured to convert the baseband signal into an in-band signal. The wideband ADC is coupled to the mixer and configured to convert the mixed signal into a wideband signal
Data Source
AI summary
A wireless communication device includes a mixer, a low-pass filter (LPF), an in-band analog-to-digital converter (ADC), a wideband ADC, and a baseband processor. The mixer is configured to mix a radio frequency signal and a carrier signal for performing frequency conversion on the radio frequency signal to obtain a mixed signal. The LPF is coupled to the mixer and configured to perform filtering on the mixed signal to filter out signal components of the mixed signal out of a passband to obtain a baseband signal. The in-band ADC is configured to convert the baseband signal into an in-band signal. The wideband ADC is configured to convert the mixed signal into a wideband signal. The baseband processor is coupled to the in-band ADC and the wideband ADC, and configured to compare the wideband signal with the in-band signal to determine whether an out-of-band interference exists.