Angle Diversity Receiver Adaptive Horn Orientation
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Solution Overview
Problem
Angle diversity receiving devices face a decrease in reception level and diversity effect due to changes in radio wave arrival angles and tropospheric scatter propagation conditions, particularly experiencing long-period fading and increased correlation between branches.
Innovation Solution
The implementation of phased array synthesis and correlation control mechanisms to dynamically adjust the angular difference between branches, using phased array synthesizing circuits and correlation control circuits to minimize correlation values and maintain optimal reception levels and diversity effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the orientations of the horn antennas are fixed at predetermined angles, then the angle diversity receiving device can perform angle diversity processing on received signals, but the reception level may remarkably decrease when the transmitting direction of radio waves changes due to tropospheric scatter propagation changes
Solution Approach 1:
The patent applies the dynamics principle by making the orientations of the horn antennas adjustable rather than fixed. The orientation adjusting mechanism allows each horn antenna to independently change its orientation angle according to control signals, enabling the system to adapt to changing tropospheric scatter propagation conditions and maintain stable reception levels despite variations in transmitting directions
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the orientation angles of the horn antennas based on detected correlation values between received signals. The correlation value detecting unit monitors the correlation between signals from different horns, and when the correlation exceeds a threshold, the orientation angles are adjusted to reduce correlation and maintain diversity effect, thus adapting to changing propagation conditions
2Reliability
If the angle between receiving horns is preliminarily arranged to minimize correlation value, then angle diversity can be achieved, but the correlation value between branches increases when tropospheric scatter conditions change
Solution Approach 1:
The patent implements feedback by continuously detecting the correlation value between received signals from different horn antennas and using this information to adjust the orientations. The correlation value detecting unit provides feedback to the orientation adjusting mechanism, which adjusts the horn orientations to maintain correlation below a threshold, thereby preserving the diversity effect under changing tropospheric scatter conditions
Solution Approach 2:
The system performs self-adjustment by automatically detecting correlation values and adjusting its own horn orientations without external intervention. When the correlation between branches increases due to propagation changes, the system autonomously modifies the angular relationships between horns to restore optimal diversity conditions
Data Source
AI summary
An angle diversity receiving device performs angle diversity reception by configuring branches of angle diversity in accordance with received signals of an array antenna, the angle diversity receiving device being provided with:a plurality of phased array synthesizing unit that generates a received signal of a branch by performing phased array synthesis for the received signals of a plurality of antenna elements included in the array antenna; anda correlation control unit that outputs a correlation value for the received signals of two branches;wherein the phased array synthesizing unit controls the angular difference in the orientations of the branches for which the correlation value was computed so that the correlation value decreases.