Wireless Receiver Signal Path Segmentation for Bluetooth and WLAN
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Solution Overview
Problem
Existing RF receivers face challenges in optimizing signal processing for both Bluetooth and WLAN signals when they share components, leading to attenuation of one signal when optimizing for the other.
Innovation Solution
A wireless communication device architecture that includes pre-stage LNAs, conversion circuits, and filters to separate and optimize signal paths for Bluetooth and WLAN signals, allowing each type of signal to be processed without interference, using a method that configures filters based on the enablement state of each signal type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shared component node is optimized for filtering one signal type (Bluetooth or WLAN), then the receiving performance for that signal type is improved, but the power of the other signal type is attenuated
Solution Approach 1:
The patent divides the signal processing path into separate segments for Bluetooth and WLAN signals. After the shared LNA, the signal path is segmented into distinct filtering paths: a first filter for Bluetooth signals and a second filter for WLAN signals. This segmentation allows each filter to be optimized for its specific signal type without affecting the other, resolving the contradiction between receiving performance optimization and signal power preservation.
Solution Approach 2:
The patent applies local quality by providing different filtering characteristics to different signal paths. The first filter is configured with parameters optimized for Bluetooth signals, while the second filter is configured for WLAN signals. Each filter node has localized optimization for its specific signal type, allowing both signal types to maintain their power levels while achieving optimal receiving performance for各自的信号类型.
2Device complexity
If a shared antenna and LNA architecture is used, then device complexity is reduced, but signal processing optimization for multiple signal types becomes difficult
Solution Approach 1:
The patent segments the signal processing functionality after the shared LNA by introducing separate filter paths for different signal types. This segmentation enables independent optimization of each signal path while maintaining the simple shared antenna and LNA architecture at the front end, thus preserving low device complexity while achieving high adaptability for multiple signal types.
Solution Approach 2:
The shared LNA is designed with multi-functionality to handle both Bluetooth and WLAN signals. By configuring the LNA to support multiple signal types universally, the patent maintains a simple receiver architecture while achieving the versatility needed to process different signal types effectively, resolving the contradiction between simplicity and adaptability.
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
Ensures optimal reception performance for both Bluetooth and WLAN signals under a shared antenna architecture by filtering out unwanted signals, preventing attenuation and improving signal quality.
Implementation Method 1
at least one pre-stage low noise amplifier (LNA) is coupled to an antenna, and the at least one pre-stage LNA is configured to amplify an initial signal received by the antenna
Implementation Method 2
The first filter is configured to filter the first converted signal to reduce powers of signals other than the first-type signal among the first converted signal
Data Source
AI summary
A wireless communication device for concurrently receiving multiple types of signals and associated methods are provided. The wireless communication device includes at least one low noise amplifier (LNA), a first conversion circuit, a second conversion circuit, a first filter and a second filter. The at least one LNA amplifies an initial signal received by an antenna to generate at least one input signal, wherein the first conversion circuit and the second conversion circuit perform conversion operations according to the at least one input signal to generate a first converted signal and a second converted signal, respectively. More particularly, the first filter performs a filtering operation corresponding to a first-type signal upon the first converted signal, and the second filter performs a filtering operation corresponding to a second-type signal upon the second converted signal.