Receiver Device Dynamic Bandwidth Switching Without Interruption
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Solution Overview
Problem
Current receivers face challenges in dynamically modifying their frequency bandwidth from 20 MHz to 40 MHz without causing interruptions or interference, particularly in IEEE 802.11n standard-based wireless local area networks, due to the need for changes in intermediate frequency filters and oscillators, leading to disturbances and loss of synchronization.
Innovation Solution
A receiver device with multiple distinct filtering paths, each equipped with band-pass filters corresponding to the frequency bandwidth of adjacent radiofrequency channels, allows for dynamic adjustment of the frequency bandwidth by activating specific paths, maintaining synchronization and avoiding interruptions, using variable gain amplifiers for seamless transitions between 20 MHz and 40 MHz configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the receiver dynamically changes its bandwidth from 20 MHz to 40 MHz by changing intermediate frequency filters and oscillators, then the reception bandwidth is improved, but interruptions and loss of synchronization occur
Solution Approach 1:
The receiver is divided into multiple independent filtering paths (first filtering path with 20 MHz bandwidth, second filtering path with 40 MHz bandwidth), each capable of operating autonomously. This segmentation allows the receiver to switch between bandwidth configurations without interrupting the overall reception process, as one path can be activated while the other is deactivated.
Solution Approach 2:
The receiver implements dynamic bandwidth adjustment by selectively activating or deactiv filtering paths based on the required reception bandwidth. The activation means enable the receiver to transition from 20 MHz to 40 MHz reception dynamically without physical reconfiguration, maintaining synchronization continuity while adapting to different bandwidth requirements.
2Ease of operation
If permanent reception on 40 MHz bandwidth is adopted, then the reception configuration is simplified, but interference on the secondary channel increases
Solution Approach 1:
Each filtering path is designed with specific local characteristics - the first filtering path is optimized for 20 MHz bandwidth with corresponding filter and oscillator parameters, while the second filtering path is optimized for 40 MHz bandwidth. This local quality differentiation allows each path to operate optimally for its designated bandwidth without introducing interference from mismatched frequency parameters.
Solution Approach 2:
The receiver dynamically adapts its reception configuration by activating only the filtering path appropriate for the current transmission bandwidth. When receiving 20 MHz transmissions, only the first filtering path is activated, preventing the secondary channel from being monitored and thus avoiding interference. When 40 MHz transmissions are detected, the second filtering path is activated to capture both channels simultaneously.
3Adaptability or versatility
If the receiver switches between different bandwidth configurations, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The receiver architecture is segmented into distinct filtering paths that can be independently activated or deactivated. Each filtering path contains complete filtering and oscillation components tailored to specific bandwidth requirements, allowing the receiver to achieve multi-bandwidth capability through modular segmentation rather than a single complex reconfigurable system.
Solution Approach 2:
The receiver achieves multi-functionality by incorporating multiple filtering paths that can handle different bandwidth configurations. Rather than designing a single complex path with reconfigurable parameters, the invention uses multiple specialized paths that collectively provide universal bandwidth adaptation capability, with each path serving a specific function.
Data Source
AI summary
A data reception device in a communication network using a plurality of radio frequency channels. At least two adjacent radio frequency channels are concatenated so as to form a concatenated channel. The device is configured to receive “received” data transmitted in at least one radio frequency channel of the concatenated channel; transpose the received data at an intermediate frequency, thus outputting data at an intermediate frequency; filtering the data at the intermediate frequency with a filter including at least two separate filtering channels, each filtering channel including a band-pass filter, the frequency band of which corresponds to the frequency band of a separate radio frequency channel of the concatenated channel such that the total frequency band of the filters is equal to the frequency band of the concatenated channel; activating at least one of the filtering channels; and recombining data from the filtering channels.