Array Antenna Signal Processing Using Subset Selection
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Solution Overview
Problem
The computation complexity and reliability of array antenna signal processing increase with the number of antenna units, especially in complex wireless environments where signal fading varies across units, necessitating a method to reduce processing dimensions and enhance signal reliability.
Innovation Solution
Selecting a subset of antenna units for signal processing based on system capacity or signal quality, performing feature parameter estimation, and calculating weight coefficients for all units using these selected units, thereby reducing computational complexity and ensuring effective signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all antenna units are used for signal processing, then the reliability of received signal is improved, but the computation amount increases
Solution Approach 1:
The patent segments the antenna units into two groups: a first plurality of antenna units whose received signals are processed to determine weight coefficients, and a second plurality of antenna units that are not processed. This segmentation allows the system to use only a subset of antenna units for computation, thereby reducing the computation amount while maintaining signal reliability through the weight coefficients derived from the processed units.
Solution Approach 2:
The patent extracts and processes only the necessary subset of antenna unit signals (the first plurality) to determine weight coefficients, while excluding the remaining antenna units (the second plurality) from processing. This extraction approach reduces computational load by focusing only on the essential signals needed for reliable reception, rather than processing all available signals.
2Power
If the number of antenna units is increased, then the gain of antenna system is improved, but the computation complexity increases
Solution Approach 1:
The patent divides the antenna units into a first plurality used for signal processing and a second plurality not used for processing. This segmentation enables the system to maintain high gain by having a total of many antenna units (M ≥ N) while limiting computation to only N units, thus achieving high gain without proportional increases in computation complexity.
Solution Approach 2:
The patent applies partial action by processing signals from only a portion (N units) of the total antenna units (M units) to determine weight coefficients. The remaining M-N units are not processed but still contribute to the overall antenna gain, allowing the system to achieve excessive gain capability without the corresponding excessive computation complexity that would result from processing all units.
Data Source
AI summary
A method for processing an array antenna signal is disclosed, comprising steps of: a. determining the number of antenna units participating the processing of the array antenna signals and selecting antenna units to participate the array antenna signal processing from all the antenna units in the array antenna; b. performing signal estimation processing on received signals by all the antenna units selected in step a and obtaining a user feature parameter estimation; c. performing estimation of weight coefficients for all the antenna units of the array antenna based on the user feature parameter estimation obtained in step b; and d. receiving and/or transmitting the array antenna signals based on the weight coefficients estimated in step c. The method of the present invention can effectively reduce a computation amount of the array antenna signal processing and improve a reliability of a received signal.