Dual-Mode RF Front-End for FDD and TDD Integration
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Solution Overview
Problem
Current wireless transceiver systems face challenges in supporting both Frequency Division Duplex (FDD) and Time Division Duplex (TDD) systems simultaneously due to the need for separate front-end configurations, leading to a large and complex system design.
Innovation Solution
A wireless transceiver system that selectively uses upper and lower frequency bands or adjacent frequency bands to support both FDD and TDD systems, employing a dual-mode RF front-end with switching mechanisms to adapt to different communication modes, thereby simplifying the system configuration and enabling efficient use of limited frequency resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate front-end configurations are used for TDD and FDD systems, then both communication systems can be supported, but the system size and complexity increase significantly
Solution Approach 1:
The patent combines TDD and FDD front-end configurations into a single integrated structure. The transmitting-end and receiving-end are merged into one transceiver unit that can operate in either TDD or FDD mode, eliminating the need for separate transmitting and receiving apparatuses. This merging reduces system complexity while maintaining dual-mode support capability.
Solution Approach 2:
The transceiver is designed with universal functionality to support both TDD and FDD modes through a single apparatus. By incorporating mode selection mechanisms and configurable RF front-end components, the system can adapt to different duplexing modes without requiring separate dedicated hardware for each mode, thereby reducing overall system complexity.
2Reliability
If separate transmitting and receiving apparatuses are used to support both TDD and FDD, then communication functionality is maintained, but the number of components increases
Solution Approach 1:
The patent merges separate transmitting and receiving apparatuses into a single transceiver unit. This transceiver integrates both transmission and reception functions in one apparatus, reducing the total number of components while maintaining the ability to perform both functions reliably through mode selection and configurable RF front-end design.
Solution Approach 2:
The transceiver is designed as a universal apparatus that can perform both transmission and reception operations for both TDD and FDD modes. By making the apparatus multi-functional rather than having separate dedicated devices, the system reduces component quantity while preserving full communication functionality across different modes.
3Device complexity
If a single transceiver supports both TDD and FDD modes, then system compactness is achieved, but frequency resource allocation becomes more challenging
Solution Approach 1:
The patent implements dynamic configuration of the RF front-end based on the selected operating mode. The system can dynamically adjust frequency band allocation, filter configurations, and local oscillator settings depending on whether TDD or FDD mode is active. This dynamic adaptability allows a compact single transceiver design to efficiently handle different frequency resource requirements of both modes.
Solution Approach 2:
The system changes operating parameters such as frequency bands, filter characteristics, and local oscillator frequencies based on the selected mode. By implementing parameter changes rather than requiring separate hardware for each mode, the patent achieves system compactness while maintaining frequency resource flexibility through software-controlled parameter adjustment.
Data Source
AI summary
The present invention relates to a wireless transceiver system for supporting a dual mode that simultaneously supports the Frequency Division Duplex (FDD) method and the Time Division Duplex (TDD) method in a certain frequency band. The present system supports the FDD system conducting transmission and reception simultaneously by using different frequency bands for transmission and reception as well as the TDD system temporally alternating transmission and reception by using the common frequency band among an upper frequency band and a lower frequency band used in the FDD system as well as another frequency band adjacent thereto, thereby selectively supporting both of the two communication systems in a wireless transceiver system.