Phased Antenna Signal Summation with Noise Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing diversity reception systems face challenges in achieving reliable equiphasing of reception signals, especially in noisy conditions with multi-path propagation, leading to poor signal-to-noise ratios and increased bit error rates.
Innovation Solution
A multi-antenna system with individually adjustable phase rotation elements and switching elements determines the useful signal levels to achieve precise equiphasing, using methods that isolate and adjust the noise component, allowing for reliable symbol detection even in challenging reception conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ancillary modulation is used to achieve equiphasing of reception signals, then phase alignment can be achieved, but the system complexity increases due to additional modulation and detection circuits
Solution Approach 1:
The patent extracts and removes the ancillary modulation component from the system. Instead of using additional modulation signals for phase alignment, the invention directly processes the original reception signals through phase rotation elements, eliminating the need for ancillary modulation circuits and their associated detection mechanisms.
Solution Approach 2:
The patent introduces a control unit as an intermediary that coordinates phase rotation elements in each antenna branch. This control unit receives reception signals, determines optimal phase rotations, and adjusts the phase rotation elements accordingly, replacing the complex ancillary modulation-based control mechanism with a simpler direct control approach.
2Use of energy by moving object
If reception signals with large noise components are used for equiphasing, then all available signal energy is utilized, but the equiphasing precision deteriorates leading to incorrect symbol detection
Solution Approach 1:
The patent applies partial action by selectively using only those reception signals that meet a minimum signal-to-noise ratio threshold for the equiphasing process. Rather than forcing all signals into the combination, the system evaluates each signal's quality and includes only suitable signals, preventing noise-dominated signals from degrading the overall phase alignment precision.
Solution Approach 2:
The patent changes the parameter threshold for signal inclusion in the equiphasing process. By establishing a minimum signal-to-noise ratio requirement, the system dynamically adjusts which signals participate in phase alignment, ensuring that only signals with sufficient quality contribute to the combined output, thereby maintaining high equiphasing precision.
3Reliability
If multiple antennas are combined to improve signal-to-noise ratio, then the combined signal strength increases, but the difficulty of detecting and measuring individual signal phases increases
Solution Approach 1:
The patent applies preliminary action by performing phase rotation adjustment on each individual antenna signal before combining them. The control unit determines the optimal phase rotation for each antenna branch separately, using the known reference phase from burst signals, and pre-adjusts each signal's phase. This preliminary phase alignment simplifies the subsequent combination process and makes phase detection more straightforward in the combined signal.
Solution Approach 2:
The patent segments the phase detection and adjustment process into individual antenna branches. Each antenna's reception signal is processed separately through its own phase rotation element, with independent control based on the reference phase. This segmentation allows precise phase measurement and adjustment for each branch before combination, avoiding the complexity of trying to measure and adjust phases in the already-combined multi-antenna signal.
Data Source
AI summary
A diversity antenna system and method comprising a plurality of antennas, a plurality of switches and a plurality of phase shifters, wherein the switches and the antennas are selectively opened and closed or switched on an off to achieve equiphasing. This system separates the noise signal from the useful signal in order to achieve a proper determination of the different phases. In addition there is a receiver which is configured to receive the output of the diversity system. The logic control unit is configured to perform particular steps or algorithms in order to achieve equiphasing of the received signals.