Multi-Antenna Receiver Combining for Reliable Downlink Decoding
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Solution Overview
Problem
Using a single antenna to receive downlink signals in wireless communication can result in weakened or obstructed signals due to changes in beam coverage or obstructions, leading to poor signal quality and decoding issues.
Innovation Solution
Employing multiple antennas to receive downlink signals with different time and frequency offsets, adjusting and combining these signals to improve signal strength and noise ratio through signal processing techniques such as FFT and SNR estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used to receive downlink signals, then the device complexity is reduced, but the 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 a receiver that integrates their outputs. The processing circuitry combines the signals from different antennas to produce a combined signal, which improves signal reliability by providing signal diversity and reducing the impact of obstructions or beam coverage changes on any single antenna.
2Reliability
If multiple antennas are used to receive downlink signals, then the signal reliability is improved through signal combining, but the device complexity increases
Solution Approach 1:
The receiver is designed with multi-functionality to handle signals from multiple antennas. It performs various functions including receiving signals from both antennas, adjusting signal parameters (time offset, frequency offset, weighting factors), and combining the signals. This universal design allows the same receiver circuitry to process multiple antenna inputs without requiring separate dedicated circuits for each antenna.
3Reliability
If signals from multiple antennas are combined, then the signal-to-noise ratio is improved, but the processing complexity increases due to time and frequency offset adjustments
Solution Approach 1:
The processing circuitry adjusts signal parameters including time offset, frequency offset, and weighting factors to optimize signal combining. By dynamically changing these parameters based on signal conditions, the system improves the signal-to-noise ratio while managing processing complexity through parameter-based adaptation rather than requiring complex fixed processing architectures.
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.