Multi-Antenna Signal Control via Cross-Correlation and Energy Detection
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Solution Overview
Problem
In multi-antenna wireless communication systems, abnormal connection states of antennas can lead to invalid received signals, affecting baseband processing circuits and overall system performance, as existing technologies lack effective mechanisms for early detection and exclusion of such signals.
Innovation Solution
A control apparatus and method that determine the energy of received signals and perform cross-correlation calculations to assess signal validity, allowing for the identification of abnormal antenna connection states without requiring specific calibration signals, comprising a cross-correlation calculation unit, signal energy calculation unit, and control unit to manage signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional multi-antenna systems operate without specific calibration signals, then device complexity is reduced, but the ability to detect abnormal antenna connection states deteriorates
Solution Approach 1:
The system uses existing regular data signals for self-diagnosis of antenna connection states. The base station performs cross-correlation calculations on received signals using locally stored reference sequences, enabling the system to detect abnormal antenna connections without external calibration equipment or additional signaling overhead.
Solution Approach 2:
The base station pre-stores reference sequences corresponding to each antenna's expected signal pattern. By having these reference sequences ready in advance, the system can immediately perform cross-correlation calculations when data signals are received, enabling rapid detection of antenna connection abnormalities without requiring preliminary calibration phases.
2Measurement precision
If cross-correlation calculation is performed on received signals, then antenna connection state detection accuracy is improved, but signal processing time increases
Solution Approach 1:
The system extracts only the essential correlation information needed for antenna detection from the received data signals. By focusing cross-correlation calculations specifically on identifying antenna connection states rather than performing full signal analysis, the processing time is minimized while maintaining detection accuracy.
3Productivity
If energy threshold filtering is applied before cross-correlation calculation, then processing efficiency is improved, but detection sensitivity may deteriorate
Solution Approach 1:
The system applies energy threshold filtering as a partial preprocessing step to eliminate obviously invalid signals before cross-correlation calculation. This partial action efficiently filters out signals that clearly fail to meet minimum energy requirements, improving processing efficiency while the subsequent cross-correlation calculation maintains sensitivity for signals that pass the threshold.
Data Source
AI summary
A method of controlling a multi-antenna communication system includes: obtaining a first baseband signal through a first antenna; performing a cross-correlation calculation on the first baseband signal and default information during a period of time, thereby to obtain a plurality of cross-correlation calculation results; calculating energy of the first baseband signal to obtain a first energy value; determining connectivity state of the first antenna according to the first energy value and the cross-correlation calculation results; and controlling a signal processing circuit of the multi-antenna communication system according to the connectivity state of the first antenna.