A Phase Correction Method of Radar Transmitting Channel
A technology of transmitting channel and phase correction, applied in radio wave measurement systems, instruments, etc., can solve the problems of reducing search speed, fixing maximum error, and high error rate, and achieving the effect of improving calculation accuracy, calculation speed and accuracy
Active Publication Date: 2016-11-30
XIDIAN UNIV
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Problems solved by technology
Compared with the traditional phase calculation method using I and Q signals, the accuracy and speed of this CORDIC algorithm are significantly improved, and the implementation complexity is also significantly reduced. However, each iteration of this CORDIC algorithm needs to judge the rotation direction, which increases the implementation time. Complexity; the rotation angle decreases gradually every time, which reduces the search speed; thereby reducing the efficiency of the phase correction of the radar transceiver channel
In addition, the number of iterations of this CORDIC algorithm is fixed, and the maximum possible error is relatively fixed. For some small angle selections, the error rate will be higher
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[0037] The present invention will be further described below in conjunction with accompanying drawing:
[0038] refer to figure 1 , is a schematic flow chart of a radar transmission channel phase correction method of the present invention. The radar transmit channel phase correction method includes the following steps:
[0039] S1: Use any receiving channel of the radar to obtain the I / Q signal of the echo of the first transmitting channel of the radar to the I / Q signal of the echo of the Nth transmitting channel, and N is the number of transmitting channels of the radar. The specific instructions are as follows:
[0040] First, set the 0-degree direction of the beam emitted by the radar. The first to the Nth transmission channel of the radar transmits the signal with the beam pointing at 0 degrees in turn, and N is the number of transmission channels of the radar; any receiving channel (dedicated Correction channel) receives the echo signals of each transmission channel in...
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The invention belongs to the technical field of consistency correction of radar transmitting and receiving channels, and discloses a radar transmitting channel phase correction method. This radar transmission channel phase correction method comprises the following steps: obtain the I / Q signal of the multi-transmission channel echo of radar; Convert the I / Q signal into a complex number vector, if the complex number vector is located in the second quadrant or the third quadrant, then the Rotate it to the first quadrant or the fourth quadrant; perform vector rotation based on unidirectional search until the set accuracy is reached, and determine the final phase corresponding to each transmission channel; according to the final phase corresponding to each transmission channel, for each transmission channel for phase correction.
Description
technical field [0001] The invention belongs to the technical field of consistency correction of radar transmission and reception channels, and in particular relates to a phase correction method of a radar transmission channel. Background technique [0002] Modern radars mostly use digital array antennas, which makes the radar's coverage wider and stronger anti-jamming capability. However, there is inconsistency in the phase of the excitation of each array element in the digital array antenna transceiver channel (ie, the transmitting channel and the receiving channel). There are many reasons for these phase inconsistencies, for example, the damage of the antenna array elements, the error of each functional module in the transmitting channel or receiving channel, the amplitude and phase error between the array elements of the feeder, and the mutual coupling between the antenna array elements. The impedance change of the antenna element, etc. Phase inconsistency will greatly...
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IPC IPC(8): G01S7/40
Inventor 杨明磊陈伯孝夏碧君
Owner XIDIAN UNIV