Unified Transceiver for 80+80 MHz and 80 MHz PPDUs
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Solution Overview
Problem
Conventional devices face challenges in efficiently processing 80+80 MHz PPDUs with a single spatial stream and 80 MHz PPDUs with two spatial streams, particularly in switching between frequency and spatial multiplexing configurations, and reusing devices across various mobile units.
Innovation Solution
A unified device with two antennas, two local oscillators, and a multiplexer that allows for electrical connection based on switching, enabling the processing of either 80+80 MHz PPDUs with a single spatial stream or 80 MHz PPDUs with two spatial streams by selectively using the frequency signals from the local oscillators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate 80 MHz transceivers are used for 160 MHz or 80+80 MHz PPDUs, then the device can process wide-band modulations, but the device complexity increases and switching between frequency and spatial multiplexing configurations becomes difficult
Solution Approach 1:
The patent implements a unified transceiver that can function as either a single 80+80 MHz transceiver or two separate 80 MHz transceivers by using a single local oscillator that can be selectively divided into two LO groups. This multi-functional design eliminates the need for separate transceiver hardware for different modes, reducing device complexity while maintaining versatility.
Solution Approach 2:
The patent employs dynamic switching mechanisms including a switch matrix and controller that can reconfigure the connections between the single local oscillator and the mixers based on the operating mode. This dynamic reconfiguration allows the system to adapt between 80+80 MHz and 80 MHz modes without requiring permanent separate hardware paths.
2Device complexity
If one local oscillator is used for both transceivers, then device complexity is reduced, but interference between oscillators increases and switching between modes becomes problematic
Solution Approach 1:
The patent segments the single local oscillator signal into two separate LO groups using a switch matrix. When operating in 80 MHz mode, the switch matrix divides the LO output into two separate paths, each feeding a different mixer. This segmentation eliminates interference between oscillators while maintaining a single oscillator hardware component.
Solution Approach 2:
The switch matrix acts as an intermediary between the single local oscillator and the mixers. It controls the signal distribution dynamically, routing the LO signal to appropriate mixers based on the operating mode. This intermediary component enables mode switching while preventing oscillator interference.
3Productivity
If conventional devices are designed for specific frequency configurations, then they can maintain maximum data rates for that configuration, but they cannot be reused across various mobile units with different frequency requirements
Solution Approach 1:
The patent designs a universal transceiver that can operate in multiple frequency configurations (80+80 MHz and 80 MHz modes) within the same device. This universality allows the transceiver to be reused across different mobile units with varying frequency requirements, eliminating the need for separate devices for different configurations while maintaining maximum data rates.
Data Source
AI summary
A unified device for adjacent and non-adjacent channels/carriers for processing Physical layer Protocol Data Units (PPDUs) includes a dual-use configuration capable of processing either 80+80 Megahertz (MHz) PPDUs with a single spatial stream (160/80+80 MHz 1×1) or 80 MHz PPDUs with two spatial streams (80 MHz 2×2).