Device for real time correction of channel phase amplitude
A real-time correction and channel technology, applied in the direction of communication channel monitoring, transmission monitoring, electrical components, etc., can solve the problems of inability to achieve dynamic real-time compensation, and achieve the effect of high-precision direction finding
Inactive Publication Date: 2010-09-08
HARBIN ENG UNIV
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The current common measures are to compensate the system error or use software to compensate the phase difference between the two channels, but these methods cannot achieve dynamic real-time compensation
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The invention provides a real-time channel phase and magnitude correction device and a method thereof. The invention is comprised of a switch (3), a switch (4), a switch (16), a phase-locked source (17), a mixer (18), a power amplifier (19), a 0-60dB attenuator (20), a frequency synthesizer (25), a frequency sweep source (21), an amplifier (22), a filter (23), a 0-60dB attenuator (24) and a signal processor. By applying the real-time dynamic correction, the invention overcomes the problems that the existing correction system uses system compensation or software to correct the phase and magnitude according to a certain state and can't realize the dynamic correction. The invention corrects the temperature drift and noise ratio change with the time of vphi, and provides a phase noise random transformation system, thereby realizing the high precision direction finding.
Description
technical field The invention belongs to the technical field of signal detection. Background technique Accurate direction finding is one of the most important technical indicators to measure the quality of a receiver. According to the phase interferometer direction finding error formula, when the frequency is constant (that is, λ is constant) and the distance L between the antennas is constant, the direction finding error depends on the phase difference between the two channels, so accurate direction finding is to ensure the minimum phase difference between the two channels . At present, the commonly used measures are to compensate the system error or compensate the phase difference between the two channels with software methods, but these methods cannot achieve dynamic real-time compensation. Because active components and even passive components in the direction finding channel are affected by temperature and noise, the phase difference between the two channels changes ra...
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IPC IPC(8): H04B17/00H04B1/16H04B17/30
Inventor 司锡才郭立民郜丽鹏
Owner HARBIN ENG UNIV