Antenna Diversity System With Multiple Tuner Circuits
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Solution Overview
Problem
Antenna diversity systems face challenges in effectively decoding radio frequency signals due to destructive interference from multi-path fading, where signals from direct and alternate paths combine to reduce signal amplitude, making reliable decoding difficult, especially under weak signal conditions.
Innovation Solution
An antenna diversity system with multiple tuner circuits configured in a daisy-chain configuration, utilizing inter-chip communication links to synchronize and combine signals from multiple antennas, allowing for phase diversity, switching antenna, and alternate frequency scan modes to enhance signal reception by constructingively combining signals and selecting the strongest signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple tuner circuits are used to receive signals from multiple antennas, then signal reception reliability is improved under multi-path fading conditions, but device complexity increases
Solution Approach 1:
The patent combines multiple tuner circuits into a unified antenna diversity system where tuners are interconnected through inter-chip communication links. The tuners work together as an integrated system rather than independent units, sharing signal processing resources and coordinating through standardized interfaces to achieve diversity reception while managing complexity through consolidation.
Solution Approach 2:
The tuner circuits are designed with multiple operating modes including phase diversity mode, switching antenna mode, and alternate frequency scan mode. Each tuner can perform multiple functions depending on the operating mode selected, allowing the system to adapt to different signal conditions and channel environments, thereby improving reliability without requiring separate dedicated circuits for each function.
2Productivity
If digital communication links are added between tuner circuits for signal combining, then signal processing capability is improved, but spectral energy radiation increases causing interference
Solution Approach 1:
The patent introduces inter-chip communication links as intermediary channels between tuner circuits, allowing digital signal exchange without direct RF coupling. These links serve as isolated mediators that enable coordination and signal combining while preventing the generation of harmful spectral radiation that would occur with direct RF interconnections between tuners.
Data Source
AI summary
In an embodiment, a tuner circuit includes an inter-chip receiver circuit configurable to couple to a first inter-chip communication link to receive a first data stream and includes an analog-to-digital converter configured to convert a radio frequency signal into a digital version of the radio frequency signal. The tuner circuit further includes a digital signal processor coupled to the inter-chip receiver circuit and the analog-to-digital converter. The digital signal processor is configurable to generate an output signal related to at least one of the first data stream and the digital version of the radio frequency signal based on a selected operating mode.