Adaptive Equalizer Switching for Inverse-Correlation Antenna Reception
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Solution Overview
Problem
In communication systems using inverse correlation antennas, the reconvergence of equalization coefficients after system switching is time-consuming, leading to potential data demodulation with insufficient output quality and high bit error rates due to changing propagation paths.
Innovation Solution
A reception device with two antennas in inverse correlation, equipped with a switching unit and an adaptive equalizer, where equalization coefficients are altered synchronously with switching, using initial values such as complex conjugates or preset values to reduce reconvergence time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna switching is performed in selection diversity using inverse correlation antennas, then communication quality is maintained through diversity gain, but the equalization coefficients require time-consuming reconvergence leading to high bit error rates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing equalization coefficients for multiple possible propagation paths before switching occurs. When antenna switching is performed, the system can immediately retrieve and apply the pre-computed coefficients corresponding to the new path, eliminating the need for time-consuming reconvergence and maintaining communication quality without bit error rate degradation
Solution Approach 2:
The patent implements dynamics by making the equalization coefficients adaptive and switchable based on the current propagation path. The system dynamically selects among multiple sets of pre-computed coefficients corresponding to different multipath conditions, allowing rapid adaptation to path changes without requiring gradual reconvergence, thus reducing the time loss during antenna switching
2Reliability
If adaptive equalization is used to handle changing propagation paths, then signal quality is maintained, but system complexity increases due to continuous coefficient updating
Solution Approach 1:
The patent reduces system complexity by pre-computing equalization coefficients for all anticipated propagation paths before operation. Instead of continuously updating coefficients through complex adaptive algorithms during operation, the system simply retrieves pre-computed coefficients based on the current path state, maintaining signal quality while dramatically simplifying the real-time processing complexity
Solution Approach 2:
The patent changes the approach from continuous parameter adaptation to discrete parameter selection. By pre-computing coefficients for specific propagation path conditions and selecting the appropriate set based on current conditions, the system maintains signal quality without requiring complex continuous adaptation mechanisms, thereby reducing overall system complexity
Data Source
AI summary
A reception device includes two antennas 1-1, 1-2 that are in an inverse correlation, a switching unit 4 which switches the signal that is to be processed among signals received by the two antennas 1-1, 1-2, and an adaptive equalizer 6 which uses equalization coefficients to perform equalizing processing on the signal considered by the switching unit 4 to be the signal to be processed, and an equalization coefficient altering unit 7 which alters the equalization coefficients used by the adaptive equalizer 6 synchronously with the timing of switching performed by the switching unit 4. In the reception device can reduce the required time for reconvergence of equalization coefficients stemming from reception system switching in selection diversity using an inverse correlation antenna.