초록 ▼

An adaptive signal processing system for enhancing the signal-to-interference characteristics on both receive and transmit using an in phase-quadrature correlator to control phase and amplitude adjust circuits located in the antenna signal paths. The amplitude adjustment provides amplitude balance c

An adaptive signal processing system for enhancing the signal-to-interference characteristics on both receive and transmit using an in phase-quadrature correlator to control phase and amplitude adjust circuits located in the antenna signal paths. The amplitude adjustment provides amplitude balance control with variable delay lines between a quadrature hybrid and a sum-difference hybrid. The analog outputs of the correlator are digitized to control incrementally adjustable delay lines of the phase and amplitude circuits in binary steps.

대표청구항 ▼

A steerable null antenna processor system for receiving desired wave energy signals from at least one angular region of space within the area covered by the system and for suppressing interfering signals from at least one other angular region comprising: antenna means having at least first and secon

A steerable null antenna processor system for receiving desired wave energy signals from at least one angular region of space within the area covered by the system and for suppressing interfering signals from at least one other angular region comprising: antenna means having at least first and second antenna elements; antenna signal path means including combining means coupled between said antenna elements and a common port for supplying said desired wave energy signals to said common port; nulling means comprising phase means and amplitude means forming part of said antenna signal path means, both the phase means and the amplitude means being adjustable in incremental steps and having control inputs, operative in response to digital control inputs to adjust the phase and amplitude values of the nulling means; analog controller means having correlator means, at least one reference input and at least one feedback input from said antenna signal path means, said analog controller means being operative to generate analog phase and amplitude control signals, converter means to change the last said signals to digital control signals and to supply them to said control inputs of the nulling means, to thereby steer at least one null to interfering signals; said correlator means comprising an in phase hybrid and a quadrature hybrid with inputs coupled to said feedback and reference inputs, two mixers connected to multiply together outputs from said hybrids, and integration means to generate said analog phase and amplitude control signals.