Multiple-Receiver Signal Combining for Obstructed Downlink Reception
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Solution Overview
Problem
User equipment with a single antenna may struggle to receive and decode weak or obstructed downlink signals due to changes in beam coverage or obstructions, leading to poor signal quality and connectivity issues.
Innovation Solution
User equipment employs multiple antennas to receive downlink signals with different time and frequency offsets, aligning and combining these signals to improve signal strength and noise ratio through signal processing techniques like FFT and SNR estimation, enabling better decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used to receive downlink signals, then device complexity is reduced, but signal reliability deteriorates when beam coverage changes or obstructions occur
Solution Approach 1:
The patent combines signals from multiple antennas (first antenna and second antenna) through signal processing circuitry that receives signals from both antennas, adjusts them for time and frequency offsets, and combines the adjusted signals to improve signal quality and reliability, directly resolving the contradiction by merging multiple signal sources to overcome single-antenna limitations
2Reliability
If multiple antennas are used to receive downlink signals, then signal reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the signal reception function across multiple antennas, with each antenna receiving signals independently and the processing circuitry handling each signal separately before combination. This segmentation allows the system to achieve improved reliability through diversity while managing complexity by distributing the reception function rather than requiring a single complex antenna system
3Reliability
If signals from multiple antennas are combined, then signal strength and noise ratio are improved, but processing complexity increases
Solution Approach 1:
The patent applies parameter changes by adjusting signals for time offsets and frequency offsets before combination. The processing circuitry modifies signal parameters (time alignment and frequency alignment) to optimize the combining process, thereby improving signal quality while managing processing complexity through targeted parameter adjustments rather than comprehensive signal transformation
Data Source
AI summary
User equipment includes a receiver, a first antenna and a second antenna coupled to the receiver, and processing circuitry communicatively coupled to the receiver and configured to cause the receiver to receive a first signal via the first antenna and a second signal via the second antenna, adjust the first signal based on a first time offset and a first frequency offset associated with the first signal to generate a first adjusted signal, adjust the second signal based on a second time offset and a second frequency offset associated with the second signal to generate a second adjusted signal, and decode downlink information based on the first adjusted signal and the second adjusted signal.