Adaptive array antenna controller
First Claim
1. An adaptive array antenna controller that adaptively controls weighting coefficients of a plurality of antenna elements of an array antenna based on a digital signal outputted from an analog-to-digital converter receiving a weighted analog signal received from the array antenna, comprising:
- an impulse response measuring device for obtaining impulse responses, based on correlation calculation of the digital signal and a known signal having a predetermined pattern;
an impulse response generator for extracting path components existing within a predetermined time duration from among a plurality of path components included in the impulse responses and generating desired impulse responses;
a reference signal generator for forming a reference signal having a desired pattern, based on convolution calculation of the desired impulse responses and the known signal; and
an adaptive controller for adjusting the weighting coefficients, based on the digital signal and the reference signal.
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Abstract
An adaptive array antenna controller is disclosed that adaptively controls weighting coefficients of multiple antenna elements of an array antenna based on a digital signal outputted from an analog-to-digital converter receiving a weighted analog signal received from the array antenna. The controller includes an impulse response measuring device for obtaining impulse responses, based on correlation calculation of the digital signal and a known signal having a predetermined pattern; an impulse response generator for extracting path components existing within a predetermined time duration from among plural path components included in the impulse responses and generating desired impulse responses; a reference signal generator for forming a reference signal having a desired pattern, based on convolution calculation of the desired impulse responses and the known signal; and an adaptive controller for adjusting the weighting coefficients, based on the digital signal and the reference signal.
35 Citations
13 Claims
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1. An adaptive array antenna controller that adaptively controls weighting coefficients of a plurality of antenna elements of an array antenna based on a digital signal outputted from an analog-to-digital converter receiving a weighted analog signal received from the array antenna, comprising:
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an impulse response measuring device for obtaining impulse responses, based on correlation calculation of the digital signal and a known signal having a predetermined pattern;
an impulse response generator for extracting path components existing within a predetermined time duration from among a plurality of path components included in the impulse responses and generating desired impulse responses;
a reference signal generator for forming a reference signal having a desired pattern, based on convolution calculation of the desired impulse responses and the known signal; and
an adaptive controller for adjusting the weighting coefficients, based on the digital signal and the reference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification